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Examples

Basic Geometric example using objectHashes

GCP Examples

A simple example of how you might utilise the objectHashes can be done via:

from typing import Annotated

from encord.objects.ontology_labels_impl import LabelRowV2
from encord.objects.ontology_object_instance import ObjectInstance

from encord_agents.core.data_model import FrameData
from encord_agents.core.dependencies import Depends
from encord_agents.gcp.dependencies import dep_objects
from encord_agents.gcp.wrappers import editor_agent


@editor_agent
def handle_object_hashes(
    frame_data: FrameData,
    lr: LabelRowV2,
    object_instances: Annotated[list[ObjectInstance], Depends(dep_objects)],
) -> None:
    for object_inst in object_instances:
        print(object_inst)

An example use case of the above: Suppose that I have my own OCR model and I want to selectively run OCR on objects I've selected from the Encord app. You can then trigger your agent from the app and it'll appropriately send a list of objectHashes to your agent. Then via the dep_objects method above, it gives the agent immediate access to the object instance making it easier to integrate your OCR model.

Test the Agent

  1. Save the above code as agent.py.
  2. Then in your current terminal, run the following command to run the agent in debug mode.
functions-framework --target=handle_object_hashes --debug --source agent.py
  1. Open your Project in the Encord platform and navigate to a frame with an object that you want to act on. Choose an object from the bottom left sider and click Copy URL as shown:
Copy URL from left sider

Tip

The url should have roughly this format: "https://app.encord.com/label_editor/{project_hash}/{data_hash}/{frame}/0?other_query_params&objectHash={objectHash}".

  1. In another shell operating from the same working directory, source your virtual environment and test the agent.

    source venv/bin/activate
encord-agents test local agent '<your_url>'

  2. To see if the test is successful, refresh your browser to see the action taken by the Agent. Once the test runs successfully, you are ready to deploy your agent. Visit the deployment documentation to learn more.

Nested Classification using Claude 3.5 Sonnet

The goals of this example are:

  1. Create an editor agent that automatically adds frame-level classifications.
  2. Demonstrate how to use the OntologyDataModel for classifications.

Prerequisites

Before you begin, ensure you have:

Run the following commands to set up your environment:

python -m venv venv                 # Create a virtual Python environment  
source venv/bin/activate            # Activate the virtual environment  
python -m pip install encord-agents anthropic  # Install required dependencies  
export ANTHROPIC_API_KEY="<your_api_key>"     # Set your Anthropic API key  
export ENCORD_SSH_KEY_FILE="/path/to/your/private/key"  # Define your Encord SSH key

Project Setup

Create a Project with visual content (images, image groups, image sequences, or videos) in Encord. This example uses the following Ontology, but any Ontology containing classifications can be used.

Ontology

See the ontology JSON
ontology.json
{
  "objects": [],
  "classifications": [
    {
      "id": "1",
      "featureNodeHash": "TTkHMtuD",
      "attributes": [
        {
          "id": "1.1",
          "featureNodeHash": "+1g9I9Sg",
          "type": "text",
          "name": "scene summary",
          "required": false,
          "dynamic": false
        }
      ]
    },
    {
      "id": "2",
      "featureNodeHash": "xGV/wCD0",
      "attributes": [
        {
          "id": "2.1",
          "featureNodeHash": "k3EVexk7",
          "type": "radio",
          "name": "is there a person in the frame?",
          "required": false,
          "options": [
            {
              "id": "2.1.1",
              "featureNodeHash": "EkGwhcO4",
              "label": "yes",
              "value": "yes",
              "options": [
                {
                  "id": "2.1.1.1",
                  "featureNodeHash": "mj9QCDY4",
                  "type": "text",
                  "name": "What is the person doing?",
                  "required": false
                }
              ]
            },
            {
              "id": "2.1.2",
              "featureNodeHash": "37rMLC/v",
              "label": "no",
              "value": "no",
              "options": []
            }
          ],
          "dynamic": false
        }
      ]
    }
  ]
}

To construct the same Ontology as used in this example, run the following script.

import json
from encord.objects.ontology_structure import OntologyStructure
from encord_agents.core.utils import get_user_client

encord_client = get_user_client()
structure = OntologyStructure.from_dict(json.loads("{the_json_above}"))
ontology = encord_client.create_ontology(
    title="Your ontology title",
    structure=structure
)
print(ontology.ontology_hash)

The aim is to trigger an agent that transforms a labeling task from Figure A to Figure B. (Hint: Click the images and use the keyboard arrows to toggle between them.)

Figure A: No classification labels.
Figure B: Multiple nested classification labels generated by an LLM.

Create the Agent

Here is the full code, but a section-by-section explanation follows.

The full code for agent.py
agent.py
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import os

from anthropic import Anthropic
from encord.objects.ontology_labels_impl import LabelRowV2
from numpy.typing import NDArray
from typing_extensions import Annotated

from encord_agents.core.ontology import OntologyDataModel
from encord_agents.core.utils import get_user_client
from encord_agents.core.video import Frame
from encord_agents.gcp import Depends, editor_agent
from encord_agents.gcp.dependencies import FrameData, dep_single_frame

client = get_user_client()
project = client.get_project("<your_project_hash>")

# Data model
data_model = OntologyDataModel(project.ontology_structure.classifications)

system_prompt = f"""
You're a helpful assistant that's supposed to help fill in json objects 
according to this schema:

    ```json
    {data_model.model_json_schema_str}
    ```

Please only respond with valid json.
"""

# Prompts
ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
anthropic_client = Anthropic(api_key=ANTHROPIC_API_KEY)


@editor_agent()
def agent(
    frame_data: FrameData,
    lr: LabelRowV2,
    content: Annotated[NDArray, Depends(dep_single_frame)],
):
    frame = Frame(frame_data.frame, content=content)
    message = anthropic_client.messages.create(
        model="claude-3-5-sonnet-20241022",
        max_tokens=1024,
        system=system_prompt,
        messages=[
            {
                "role": "user",
                "content": [frame.b64_encoding(output_format="anthropic")],
            }
        ],
    )
    try:
        classifications = data_model(message.content[0].text)
        for clf in classifications:
            clf.set_for_frames(frame_data.frame, confidence=0.5, manual_annotation=False)
            lr.add_classification_instance(clf)
    except Exception:
        import traceback

        traceback.print_exc()
        print(f"Response from model: {message.content[0].text}")

    lr.save()

  1. Import dependencies and set up the Project.

    Info

    Ensure you insert your Project's unique identifier.

    agent.py
    import os

from anthropic import Anthropic
from encord.objects.ontology_labels_impl import LabelRowV2
from numpy.typing import NDArray
from typing_extensions import Annotated

from encord_agents.core.ontology import OntologyDataModel
from encord_agents.core.utils import get_user_client
from encord_agents.core.video import Frame
from encord_agents.gcp import Depends, editor_agent
from encord_agents.gcp.dependencies import FrameData, dep_single_frame

client = get_user_client()
project = client.get_project("<your_project_hash>")

  2. Create a data model and a system prompt based on the Project Ontology to tell Claude how to structure its response:

    agent.py
    data_model = OntologyDataModel(project.ontology_structure.classifications)

system_prompt = f"""
You're a helpful assistant that's supposed to help fill in json objects 
according to this schema:

    ```json
    {data_model.model_json_schema_str}
    ```

Please only respond with valid json.
"""

    ??? "See the result of data_model.model_json_schema_str for the given example" 

    {
  "$defs": {
    "IsThereAPersonInTheFrameRadioModel": {
      "properties": {
        "feature_node_hash": {
          "const": "k3EVexk7",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "k3EVexk7"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "choice": {
          "description": "Choose exactly one answer from the given options.",
          "discriminator": {
            "mapping": {
              "37rMLC/v": "#/$defs/NoNestedRadioModel",
              "EkGwhcO4": "#/$defs/YesNestedRadioModel"
            },
            "propertyName": "feature_node_hash"
          },
          "oneOf": [
            {
              "$ref": "#/$defs/YesNestedRadioModel"
            },
            {
              "$ref": "#/$defs/NoNestedRadioModel"
            }
          ],
          "title": "Choice"
        }
      },
      "required": [
        "feature_node_hash",
        "choice"
      ],
      "title": "IsThereAPersonInTheFrameRadioModel",
      "type": "object"
    },
    "NoNestedRadioModel": {
      "properties": {
        "feature_node_hash": {
          "const": "37rMLC/v",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "37rMLC/v"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "title": {
          "const": "no",
          "default": "Constant value - should be included as-is.",
          "enum": [
            "no"
          ],
          "title": "Title",
          "type": "string"
        }
      },
      "required": [
        "feature_node_hash"
      ],
      "title": "NoNestedRadioModel",
      "type": "object"
    },
    "SceneSummaryTextModel": {
      "properties": {
        "feature_node_hash": {
          "const": "+1g9I9Sg",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "+1g9I9Sg"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "value": {
          "description": "Please describe the image as accurate as possible focusing on 'scene summary'",
          "maxLength": 1000,
          "minLength": 0,
          "title": "Value",
          "type": "string"
        }
      },
      "required": [
        "feature_node_hash",
        "value"
      ],
      "title": "SceneSummaryTextModel",
      "type": "object"
    },
    "WhatIsThePersonDoingTextModel": {
      "properties": {
        "feature_node_hash": {
          "const": "mj9QCDY4",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "mj9QCDY4"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "value": {
          "description": "Please describe the image as accurate as possible focusing on 'What is the person doing?'",
          "maxLength": 1000,
          "minLength": 0,
          "title": "Value",
          "type": "string"
        }
      },
      "required": [
        "feature_node_hash",
        "value"
      ],
      "title": "WhatIsThePersonDoingTextModel",
      "type": "object"
    },
    "YesNestedRadioModel": {
      "properties": {
        "feature_node_hash": {
          "const": "EkGwhcO4",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "EkGwhcO4"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "what_is_the_person_doing": {
          "$ref": "#/$defs/WhatIsThePersonDoingTextModel",
          "description": "A text attribute with carefully crafted text to describe the property."
        }
      },
      "required": [
        "feature_node_hash",
        "what_is_the_person_doing"
      ],
      "title": "YesNestedRadioModel",
      "type": "object"
    }
  },
  "properties": {
    "scene_summary": {
      "$ref": "#/$defs/SceneSummaryTextModel",
      "description": "A text attribute with carefully crafted text to describe the property."
    },
    "is_there_a_person_in_the_frame": {
      "$ref": "#/$defs/IsThereAPersonInTheFrameRadioModel",
      "description": "A mutually exclusive radio attribute to choose exactly one option that best matches to the give visual input."
    }
  },
  "required": [
    "scene_summary",
    "is_there_a_person_in_the_frame"
  ],
  "title": "ClassificationModel",
  "type": "object"
}

  3. Create an Anthropic API client to communicate with Claude.

    agent.py
    ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
anthropic_client = Anthropic(api_key=ANTHROPIC_API_KEY)

  4. Define the editor agent.

    agent.py
    @editor_agent()
def agent(
    frame_data: FrameData,
    lr: LabelRowV2,
    content: Annotated[NDArray, Depends(dep_single_frame)],
):
    frame = Frame(frame_data.frame, content=content)
    message = anthropic_client.messages.create(
        model="claude-3-5-sonnet-20241022",
        max_tokens=1024,
        system=system_prompt,
        messages=[
            {
                "role": "user",
                "content": [frame.b64_encoding(output_format="anthropic")],
            }
        ],
    )
    try:
        classifications = data_model(message.content[0].text)
        for clf in classifications:
            clf.set_for_frames(frame_data.frame, confidence=0.5, manual_annotation=False)
            lr.add_classification_instance(clf)
    except Exception:
        import traceback

        traceback.print_exc()
        print(f"Response from model: {message.content[0].text}")

    lr.save()

The agent follows these steps:

  1. Automatically retrieves the frame content using the dep_single_frame dependency.
  2. Sends the frame image to Claude for analysis.
  3. Parses Claude's response into classification instances using the predefined data model.
  4. Adds the classifications to the label row and saves the results.

Test the Agent

  1. In your current terminal, run the following command to run the agent in debug mode.

    functions-framework --target=agent --debug --source agent.py

  2. Open your Project in the Encord platform and navigate to a frame you want to add a classification to. Copy the URL from your browser.

    Tip

    The url should have roughly this format: "https://app.encord.com/label_editor/{project_hash}/{data_hash}/{frame}".

  3. In another shell operating from the same working directory, source your virtual environment and test the agent.

    source venv/bin/activate
encord-agents test local agent '<your_url>'

  4. To see if the test is successful, refresh your browser to view the classifications generated by Claude. Once the test runs successfully, you are ready to deploy your agent. Visit the deployment documentation to learn more.

Nested Attributes using Claude 3.5 Sonnet

The goals of this example are:

  1. Create an editor agent that can convert generic object annotations (class-less coordinates) into class specific annotations with nested attributes like descriptions, radio buttons, and checklists.
  2. Demonstrate how to use both the OntologyDataModel and the dep_object_crops dependency.

Prerequisites

Before you begin, ensure you have:

Run the following commands to set up your environment:

python -m venv venv                 # Create a virtual Python environment  
source venv/bin/activate            # Activate the virtual environment  
python -m pip install encord-agents anthropic  # Install required dependencies  
export ANTHROPIC_API_KEY="<your_api_key>"     # Set your Anthropic API key  
export ENCORD_SSH_KEY_FILE="/path/to/your/private/key"  # Define your Encord SSH key

Project Setup

Create a Project with visual content (images, image groups, image sequences, or videos) in Encord. This example uses the following Ontology, but any Ontology containing classifications can be used provided the object types are the same and there is one entry called "generic".

Ontology

See the ontology JSON
ontology.json
{
  "objects": [
    {
      "id": "1",
      "name": "person",
      "color": "#D33115",
      "shape": "bounding_box",
      "featureNodeHash": "2xlDPPAG",
      "required": false,
      "attributes": [
        {
          "id": "1.1",
          "featureNodeHash": "aFCN9MMm",
          "type": "text",
          "name": "activity",
          "required": false,
          "dynamic": false
        }
      ]
    },
    {
      "id": "2",
      "name": "animal",
      "color": "#E27300",
      "shape": "bounding_box",
      "featureNodeHash": "3y6JxTUX",
      "required": false,
      "attributes": [
        {
          "id": "2.1",
          "featureNodeHash": "2P7LTUZA",
          "type": "radio",
          "name": "type",
          "required": false,
          "options": [
            {
              "id": "2.1.1",
              "featureNodeHash": "gJvcEeLl",
              "label": "dolphin",
              "value": "dolphin",
              "options": []
            },
            {
              "id": "2.1.2",
              "featureNodeHash": "CxrftGS4",
              "label": "monkey",
              "value": "monkey",
              "options": []
            },
            {
              "id": "2.1.3",
              "featureNodeHash": "OQyWm7Sm",
              "label": "dog",
              "value": "dog",
              "options": []
            },
            {
              "id": "2.1.4",
              "featureNodeHash": "CDKmYJK/",
              "label": "cat",
              "value": "cat",
              "options": []
            }
          ],
          "dynamic": false
        },
        {
          "id": "2.2",
          "featureNodeHash": "5fFgrM+E",
          "type": "text",
          "name": "description",
          "required": false,
          "dynamic": false
        }
      ]
    },
    {
      "id": "3",
      "name": "vehicle",
      "color": "#16406C",
      "shape": "bounding_box",
      "featureNodeHash": "llw7qdWW",
      "required": false,
      "attributes": [
        {
          "id": "3.1",
          "featureNodeHash": "79mo1G7Q",
          "type": "text",
          "name": "type - short and concise",
          "required": false,
          "dynamic": false
        },
        {
          "id": "3.2",
          "featureNodeHash": "OFrk07Ds",
          "type": "checklist",
          "name": "visible",
          "required": false,
          "options": [
            {
              "id": "3.2.1",
              "featureNodeHash": "KmX/HjRT",
              "label": "wheels",
              "value": "wheels"
            },
            {
              "id": "3.2.2",
              "featureNodeHash": "H6qbEcdj",
              "label": "frame",
              "value": "frame"
            },
            {
              "id": "3.2.3",
              "featureNodeHash": "gZ9OucoQ",
              "label": "chain",
              "value": "chain"
            },
            {
              "id": "3.2.4",
              "featureNodeHash": "cit3aZSz",
              "label": "head lights",
              "value": "head_lights"
            },
            {
              "id": "3.2.5",
              "featureNodeHash": "qQ3PieJ/",
              "label": "tail lights",
              "value": "tail_lights"
            }
          ],
          "dynamic": false
        }
      ]
    },
    {
      "id": "4",
      "name": "generic",
      "color": "#FE9200",
      "shape": "bounding_box",
      "featureNodeHash": "jootTFfQ",
      "required": false,
      "attributes": []
    }
  ],
  "classifications": []
}
`

To construct the Ontology used in this example, run the following script:

```python
import json
from encord.objects.ontology_structure import OntologyStructure
from encord_agents.core.utils import get_user_client

encord_client = get_user_client()
structure = OntologyStructure.from_dict(json.loads("{the_json_above}"))
ontology = encord_client.create_ontology(
    title="Your ontology title",
    structure=structure
)
print(ontology.ontology_hash)

The goal is create an agent that takes a labeling task from Figure A to Figure B, below (Hint: you can click them and use keyboard arrows toggle between images).

Figure A: A generic label without any type annotations. Notice that in the left sidebar, there are two "generic" labels.
Figure B: A nested label with all details filled for the predicted class. Notice that in the left sidebar, there are two "animal" labels with both type and description filled.

Create the Agent

Warning

Some code blocks in this section have incorrect indentation. If you plan to copy and paste, we strongly recommend using the full code below instead of the individual sub-sections.

Here is the full code, but a section-by-section explanation follows.

The full code for agent.py
agent.py
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import os

from anthropic import Anthropic
from encord.objects.ontology_labels_impl import LabelRowV2
from typing_extensions import Annotated

from encord_agents.core.ontology import OntologyDataModel
from encord_agents.core.utils import get_user_client
from encord_agents.gcp import Depends, editor_agent
from encord_agents.gcp.dependencies import FrameData, InstanceCrop, dep_object_crops

# User client
client = get_user_client()
project = client.get_project("<project_hash>")
generic_ont_obj, *other_objects = sorted(
    project.ontology_structure.objects,
    key=lambda o: o.title.lower() == "generic",
    reverse=True,
)

# Data model
data_model = OntologyDataModel(other_objects)
system_prompt = f"""
You're a helpful assistant that's supposed to help fill in 
json objects according to this schema:

`{data_model.model_json_schema_str}`

Please only respond with valid json.
"""

# Claude
ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
anthropic_client = Anthropic(api_key=ANTHROPIC_API_KEY)


# Setup agent
@editor_agent()
def agent(
    frame_data: FrameData,
    lr: LabelRowV2,
    crops: Annotated[
        list[InstanceCrop],
        Depends(dep_object_crops(filter_ontology_objects=[generic_ont_obj])),
    ],
):
    # Query Claude
    changes = False
    for crop in crops:
        message = anthropic_client.messages.create(
            model="claude-3-5-sonnet-20241022",
            max_tokens=1024,
            system=system_prompt,
            messages=[
                {
                    "role": "user",
                    "content": [crop.b64_encoding(output_format="anthropic")],
                }
            ],
        )

        # Parse result
        try:
            instance = data_model(message.content[0].text)

            coordinates = crop.instance.get_annotation(frame=frame_data.frame).coordinates
            instance.set_for_frames(
                coordinates=coordinates,
                frames=frame_data.frame,
                confidence=0.5,
                manual_annotation=False,
            )
            lr.remove_object(crop.instance)
            lr.add_object_instance(instance)
            changes = True
        except Exception:
            import traceback

            traceback.print_exc()
            print(f"Response from model: {message.content[0].text}")

    # Save changes
    if changes:
        lr.save()
  1. Create a file called "agent.py".

  2. Run the following imports and read the Project Ontology. Ensure that you replace <project_hash> with the unique identifier of your Project.

    agent.py
    import os

from anthropic import Anthropic
from encord.objects.ontology_labels_impl import LabelRowV2
from typing_extensions import Annotated

from encord_agents.core.ontology import OntologyDataModel
from encord_agents.core.utils import get_user_client
from encord_agents.gcp import Depends, editor_agent
from encord_agents.gcp.dependencies import FrameData, InstanceCrop, dep_object_crops

# User client
client = get_user_client()
project = client.get_project("<project_hash>")

  3. Extract the generic Ontology object and the Ontology objects that we are interested in. The following code sorts the Ontology objects based on whether they have the title "generic" or not.

    We use the generic object to query image crops within the agent. Before doing so, we utilize other_objects to communicate the specific information we want Claude to focus on.

    To facilitate this, the OntologyDataModel class helps translate Encord Ontology Objects into a Pydantic model, as well as convert JSON objects into Encord ObjectInstances.

    agent.py
    generic_ont_obj, *other_objects = sorted(
    project.ontology_structure.objects,
    key=lambda o: o.title.lower() == "generic",
    reverse=True,
)

  4. Prepare the system prompt to go along with every object crop. For that, we use the data_model from above to create the json schema. It is worth noticing that we pass in just the other_objetcs such that the model is only allowed to choose between the object types that are not of the generic one.

    agent.py
    data_model = OntologyDataModel(other_objects)
system_prompt = f"""
You're a helpful assistant that's supposed to help fill in 
json objects according to this schema:

`{data_model.model_json_schema_str}`

Please only respond with valid json.
"""
    See the result of data_model.model_json_schema_str for the given example 
    {
  "$defs": {
    "ActivityTextModel": {
      "properties": {
        "feature_node_hash": {
          "const": "aFCN9MMm",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "aFCN9MMm"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "value": {
          "description": "Please describe the image as accurate as possible focusing on 'activity'",
          "maxLength": 1000,
          "minLength": 0,
          "title": "Value",
          "type": "string"
        }
      },
      "required": [
        "feature_node_hash",
        "value"
      ],
      "title": "ActivityTextModel",
      "type": "object"
    },
    "AnimalNestedModel": {
      "properties": {
        "feature_node_hash": {
          "const": "3y6JxTUX",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "3y6JxTUX"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "type": {
          "$ref": "#/$defs/TypeRadioModel",
          "description": "A mutually exclusive radio attribute to choose exactly one option that best matches to the give visual input."
        },
        "description": {
          "$ref": "#/$defs/DescriptionTextModel",
          "description": "A text attribute with carefully crafted text to describe the property."
        }
      },
      "required": [
        "feature_node_hash",
        "type",
        "description"
      ],
      "title": "AnimalNestedModel",
      "type": "object"
    },
    "DescriptionTextModel": {
      "properties": {
        "feature_node_hash": {
          "const": "5fFgrM+E",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "5fFgrM+E"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "value": {
          "description": "Please describe the image as accurate as possible focusing on 'description'",
          "maxLength": 1000,
          "minLength": 0,
          "title": "Value",
          "type": "string"
        }
      },
      "required": [
        "feature_node_hash",
        "value"
      ],
      "title": "DescriptionTextModel",
      "type": "object"
    },
    "PersonNestedModel": {
      "properties": {
        "feature_node_hash": {
          "const": "2xlDPPAG",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "2xlDPPAG"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "activity": {
          "$ref": "#/$defs/ActivityTextModel",
          "description": "A text attribute with carefully crafted text to describe the property."
        }
      },
      "required": [
        "feature_node_hash",
        "activity"
      ],
      "title": "PersonNestedModel",
      "type": "object"
    },
    "TypeRadioEnum": {
      "enum": [
        "dolphin",
        "monkey",
        "dog",
        "cat"
      ],
      "title": "TypeRadioEnum",
      "type": "string"
    },
    "TypeRadioModel": {
      "properties": {
        "feature_node_hash": {
          "const": "2P7LTUZA",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "2P7LTUZA"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "choice": {
          "$ref": "#/$defs/TypeRadioEnum",
          "description": "Choose exactly one answer from the given options."
        }
      },
      "required": [
        "feature_node_hash",
        "choice"
      ],
      "title": "TypeRadioModel",
      "type": "object"
    },
    "TypeShortAndConciseTextModel": {
      "properties": {
        "feature_node_hash": {
          "const": "79mo1G7Q",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "79mo1G7Q"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "value": {
          "description": "Please describe the image as accurate as possible focusing on 'type - short and concise'",
          "maxLength": 1000,
          "minLength": 0,
          "title": "Value",
          "type": "string"
        }
      },
      "required": [
        "feature_node_hash",
        "value"
      ],
      "title": "TypeShortAndConciseTextModel",
      "type": "object"
    },
    "VehicleNestedModel": {
      "properties": {
        "feature_node_hash": {
          "const": "llw7qdWW",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "llw7qdWW"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "type__short_and_concise": {
          "$ref": "#/$defs/TypeShortAndConciseTextModel",
          "description": "A text attribute with carefully crafted text to describe the property."
        },
        "visible": {
          "$ref": "#/$defs/VisibleChecklistModel",
          "description": "A collection of boolean values indicating which concepts are applicable according to the image content."
        }
      },
      "required": [
        "feature_node_hash",
        "type__short_and_concise",
        "visible"
      ],
      "title": "VehicleNestedModel",
      "type": "object"
    },
    "VisibleChecklistModel": {
      "properties": {
        "feature_node_hash": {
          "const": "OFrk07Ds",
          "description": "UUID for discrimination. Must be included in json as is.",
          "enum": [
            "OFrk07Ds"
          ],
          "title": "Feature Node Hash",
          "type": "string"
        },
        "wheels": {
          "description": "Is 'wheels' applicable or not?",
          "title": "Wheels",
          "type": "boolean"
        },
        "frame": {
          "description": "Is 'frame' applicable or not?",
          "title": "Frame",
          "type": "boolean"
        },
        "chain": {
          "description": "Is 'chain' applicable or not?",
          "title": "Chain",
          "type": "boolean"
        },
        "head_lights": {
          "description": "Is 'head lights' applicable or not?",
          "title": "Head Lights",
          "type": "boolean"
        },
        "tail_lights": {
          "description": "Is 'tail lights' applicable or not?",
          "title": "Tail Lights",
          "type": "boolean"
        }
      },
      "required": [
        "feature_node_hash",
        "wheels",
        "frame",
        "chain",
        "head_lights",
        "tail_lights"
      ],
      "title": "VisibleChecklistModel",
      "type": "object"
    }
  },
  "properties": {
    "choice": {
      "description": "Choose exactly one answer from the given options.",
      "discriminator": {
        "mapping": {
          "2xlDPPAG": "#/$defs/PersonNestedModel",
          "3y6JxTUX": "#/$defs/AnimalNestedModel",
          "llw7qdWW": "#/$defs/VehicleNestedModel"
        },
        "propertyName": "feature_node_hash"
      },
      "oneOf": [
        {
          "$ref": "#/$defs/PersonNestedModel"
        },
        {
          "$ref": "#/$defs/AnimalNestedModel"
        },
        {
          "$ref": "#/$defs/VehicleNestedModel"
        }
      ],
      "title": "Choice"
    }
  },
  "required": [
    "choice"
  ],
  "title": "ObjectsRadioModel",
  "type": "object"
}

  5. With the system prompt ready, instantiate an API client for Claude.

    agent.py
    ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
anthropic_client = Anthropic(api_key=ANTHROPIC_API_KEY)

  6. Define the editor agent.

    • All arguments are automatically injected when the agent is called. For details on dependency injection, see here.
    • The dep_object_crops dependency allows filtering. In this case, it includes only "generic" object crops, excluding those already converted to actual labels.
    agent.py
    @editor_agent()
def agent(
    frame_data: FrameData,
    lr: LabelRowV2,
    crops: Annotated[
        list[InstanceCrop],
        Depends(dep_object_crops(filter_ontology_objects=[generic_ont_obj])),
    ],
):

  7. Call Claude using the image crops. Notice how the crop variable has a convenient b64_encoding method to produce an input that Claude understands.

agent.py
# Query Claude
changes = False
for crop in crops:
    message = anthropic_client.messages.create(
        model="claude-3-5-sonnet-20241022",
        max_tokens=1024,
        system=system_prompt,
        messages=[
            {
                "role": "user",
                "content": [crop.b64_encoding(output_format="anthropic")],
            }
        ],
    )

  1. To parse the message from Claude, the data_model is again useful. When called with a JSON string, it attempts to parse it with respect to the the JSON schema we saw above to create an Encord object instance. If successful, the old generic object can be removed and the newly classified object added.

    agent.py
    try:
    instance = data_model(message.content[0].text)

    coordinates = crop.instance.get_annotation(frame=frame_data.frame).coordinates
    instance.set_for_frames(
        coordinates=coordinates,
        frames=frame_data.frame,
        confidence=0.5,
        manual_annotation=False,
    )
    lr.remove_object(crop.instance)
    lr.add_object_instance(instance)
    changes = True
except Exception:
    import traceback

    traceback.print_exc()
    print(f"Response from model: {message.content[0].text}")

  2. Save the labels with Encord.

    agent.py
    if changes:
    lr.save()

Test the Agent

  1. In your current terminal, run the following command to run the agent in debug mode.

    functions-framework --target=agent --debug --source agent.py

  2. Open your Project in the Encord platform and navigate to a frame you want to add a generic object to. Copy the URL from your browser.

    Hint

    The url should have the following format: "https://app.encord.com/label_editor/{project_hash}/{data_hash}/{frame}".

  3. In another shell operating from the same working directory, source your virtual environment and test the agent.

    source venv/bin/activate
encord-agents test local agent <your_url>

  4. To see if the test is successful, refresh your browser to view the classifications generated by Claude. Once the test runs successfully, you are ready to deploy your agent. Visit the deployment documentation to learn more.

FastAPI Examples

Basic Geometric example using objectHashes

A simple example of how you might utilise the objectHashes can be done via:

from typing import Annotated

from encord.objects.ontology_labels_impl import LabelRowV2
from encord.objects.ontology_object_instance import ObjectInstance
from fastapi import Depends, FastAPI

from encord_agents.fastapi.cors import EncordCORSMiddleware
from encord_agents.fastapi.dependencies import (
    FrameData,
    dep_label_row,
    dep_objects,
)

# Initialize FastAPI app
app = FastAPI()
app.add_middleware(EncordCORSMiddleware)


@app.post("/handle-object-hashes")
def handle_object_hashes(
    frame_data: FrameData,
    lr: Annotated[LabelRowV2, Depends(dep_label_row)],
    object_instances: Annotated[list[ObjectInstance], Depends(dep_objects)],
) -> None:
    for object_inst in object_instances:
        print(object_inst)

An example use case of the above: Suppose that I have my own OCR model and I want to selectively run OCR on objects I've selected from the Encord app. You can then trigger your agent from the app and it'll appropriately send a list of objectHashes to your agent. Then via the dep_objects method above, it gives the agent immediate access to the object instance making it easier to integrate your OCR model.

Test the Agent

  1. First save the above code as main.py then in your current terminal run the following command to runFastAPI server in development mode with auto-reload enabled.

    uvicorn main:app --reload --port 8080

  2. Open your Project in the Encord platform and navigate to a frame with an object that you want to act on. Choose an object from the bottom left sider and click Copy URL as shown:

Copy URL from left sider

!!! tip The url should have roughly this format: "https://app.encord.com/label_editor/{project_hash}/{data_hash}/{frame}/0?other_query_params&objectHash={objectHash}".

  1. In another shell operating from the same working directory, source your virtual environment and test the agent.

    source venv/bin/activate
encord-agents test local agent '<your_url>'

  2. To see if the test is successful, refresh your browser to see the action taken by the Agent. Once the test runs successfully, you are ready to deploy your agent. Visit the deployment documentation to learn more.

Nested Classification using Claude 3.5 Sonnet

The goals of this example is to:

  1. Create an editor agent that can automatically fill in frame-level classifications in the Label Editor.
  2. Demonstrate how to use the OntologyDataModel for classifications.
  3. Demonstrate how to build an agent using FastAPI that can be self-hosted.

Prerequisites

Before you begin, ensure you have:

Run the following commands to set up your environment:

python -m venv venv                   # Create a virtual Python environment  
source venv/bin/activate              # Activate the virtual environment 
python -m pip install "fastapi[standard]" encord-agents anthropic # Install required dependencies  
export ANTHROPIC_API_KEY="<your_api_key>" # Set your Anthropic API key 
export ENCORD_SSH_KEY_FILE="/path/to/your/private/key"  # Define your Encord SSH key

Project Setup

Create a Project with visual content (images, image groups, image sequences, or videos) in Encord. This example uses the following Ontology, but any Ontology containing classifications can be used.

Ontology

See the ontology JSON

[Same JSON as in GCP Frame Classification example]

The aim is to trigger an agent that transforms a labeling task from Figure A to Figure B. (Hint: Click the images and use the keyboard arrows to toggle between them.)

Figure A: no classification labels.
Figure B: Multiple nested labels coming from an LLM.

Create the FastAPI agent

Here is the full code, but a section-by-section explanation follows.

The full code for main.py
main.py
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import os

import numpy as np
from anthropic import Anthropic
from encord.objects.ontology_labels_impl import LabelRowV2
from fastapi import Depends, FastAPI, Form
from numpy.typing import NDArray
from typing_extensions import Annotated

from encord_agents.core.data_model import Frame
from encord_agents.core.ontology import OntologyDataModel
from encord_agents.core.utils import get_user_client
from encord_agents.fastapi.cors import EncordCORSMiddleware
from encord_agents.fastapi.dependencies import (
    FrameData,
    dep_label_row,
    dep_single_frame,
)

# Initialize FastAPI app
app = FastAPI()
app.add_middleware(EncordCORSMiddleware)

# Setup project and data model
client = get_user_client()
project = client.get_project("<your_project_hash>")
data_model = OntologyDataModel(project.ontology_structure.classifications)

# Setup Claude
system_prompt = f"""
You're a helpful assistant that's supposed to help fill in json objects 
according to this schema:

    ```json
    {data_model.model_json_schema_str}
    ```

Please only respond with valid json.
"""

ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
anthropic_client = Anthropic(api_key=ANTHROPIC_API_KEY)


@app.post("/frame_classification")
async def classify_frame(
    frame_data: FrameData,
    lr: Annotated[LabelRowV2, Depends(dep_label_row)],
    content: Annotated[NDArray[np.uint8], Depends(dep_single_frame)],
):
    """Classify a frame using Claude."""
    frame = Frame(frame=frame_data.frame, content=content)
    message = anthropic_client.messages.create(
        model="claude-3-5-sonnet-20241022",
        max_tokens=1024,
        system=system_prompt,
        messages=[
            {
                "role": "user",
                "content": [frame.b64_encoding(output_format="anthropic")],
            }
        ],
    )
    try:
        classifications = data_model(message.content[0].text)
        for clf in classifications:
            clf.set_for_frames(frame_data.frame, confidence=0.5, manual_annotation=False)
            lr.add_classification_instance(clf)
    except Exception:
        import traceback

        traceback.print_exc()
        print(f"Response from model: {message.content[0].text}")

    lr.save()

  1. Import dependencies and set up the Project. The CORS middleware is crucial as it allows the Encord platform to make requests to your API.

    main.py
    import os

import numpy as np
from anthropic import Anthropic
from encord.objects.ontology_labels_impl import LabelRowV2
from fastapi import Depends, FastAPI, Form
from numpy.typing import NDArray
from typing_extensions import Annotated

from encord_agents.core.data_model import Frame
from encord_agents.core.ontology import OntologyDataModel
from encord_agents.core.utils import get_user_client
from encord_agents.fastapi.cors import EncordCORSMiddleware
from encord_agents.fastapi.dependencies import (
    FrameData,
    dep_label_row,
    dep_single_frame,
)

# Initialize FastAPI app
app = FastAPI()
app.add_middleware(EncordCORSMiddleware)

  2. Set up the Project and create a data model based on the Ontology.

    main.py
    client = get_user_client()
project = client.get_project("<your_project_hash>")
data_model = OntologyDataModel(project.ontology_structure.classifications)

  3. Create the system prompt that tells Claude how to structure its response.

    main.py
    system_prompt = f"""
You're a helpful assistant that's supposed to help fill in json objects 
according to this schema:

    ```json
    {data_model.model_json_schema_str}
    ```

Please only respond with valid json.
"""

ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
anthropic_client = Anthropic(api_key=ANTHROPIC_API_KEY)

  4. Define the endpoint to handle the classification:

    main.py
    @app.post("/frame_classification")
async def classify_frame(
    frame_data: FrameData,
    lr: Annotated[LabelRowV2, Depends(dep_label_row)],
    content: Annotated[NDArray[np.uint8], Depends(dep_single_frame)],
):
    """Classify a frame using Claude."""
    frame = Frame(frame=frame_data.frame, content=content)
    message = anthropic_client.messages.create(
        model="claude-3-5-sonnet-20241022",
        max_tokens=1024,
        system=system_prompt,
        messages=[
            {
                "role": "user",
                "content": [frame.b64_encoding(output_format="anthropic")],
            }
        ],
    )
    try:
        classifications = data_model(message.content[0].text)
        for clf in classifications:
            clf.set_for_frames(frame_data.frame, confidence=0.5, manual_annotation=False)
            lr.add_classification_instance(clf)
    except Exception:
        import traceback

        traceback.print_exc()
        print(f"Response from model: {message.content[0].text}")

    lr.save()

The endpoint:

  1. Receives frame data via FastAPI's Form dependency.
  2. Retrieves the label row and frame content using Encord agents' dependencies.
  3. Constructs a Frame object with the content.
  4. Sends the frame image to Claude for analysis.
  5. Parses Claude's response into classification instances.
  6. Adds classifications to the label row and saves the updated data.

Test the Agent

  1. In your current terminal run the following command to runFastAPI server in development mode with auto-reload enabled.

    uvicorn main:app --reload --port 8080

  2. Open your Project in the Encord platform and navigate to a frame you want to add a classification to. Copy the URL from your browser.

    Tip

    The url should have the following format: "https://app.encord.com/label_editor/{project_hash}/{data_hash}/{frame}".

  3. In another shell operating from the same working directory, source your virtual environment and test the agent.

    source venv/bin/activate
encord-agents test local frame_classification '<your_url>'

  4. To see if the test is successful, refresh your browser to view the classifications generated by Claude. Once the test runs successfully, you are ready to deploy your agent. Visit the deployment documentation to learn more.

Nested Attributes using Claude 3.5 Sonnet

The goals of this example are:

  1. Create an editor agent that can convert generic object annotations (class-less coordinates) into class specific annotations with nested attributes like descriptions, radio buttons, and checklists.
  2. Demonstrate how to use both the OntologyDataModel and the dep_object_crops dependency.

Prerequisites

Before you begin, ensure you have:

Run the following commands to set up your environment:

python -m venv venv                 # Create a virtual Python environment  
source venv/bin/activate            # Activate the virtual environment  
python -m pip install encord-agents anthropic  # Install required dependencies  
export ANTHROPIC_API_KEY="<your_api_key>"     # Set your Anthropic API key  
export ENCORD_SSH_KEY_FILE="/path/to/your/private/key"  # Define your Encord SSH key

Project Setup

Create a Project with visual content (images, image groups, image sequences, or videos) in Encord. This example uses the following Ontology, but any Ontology containing classifications can be used provided the object types are the same and there is one entry called "generic".

Ontology

See the ontology JSON

[Same JSON as in GCP Object Classification example]

The goal is to trigger an agent that takes a labeling task from Figure A to Figure B, below:

Figure A: A generic label without any type annotations.
Figure B: A nested label with all details filled for the predicted class.

Create the FastAPI Agent

Here is the full code, but a section-by-section explanation follows.

The full code for main.py
main.py
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import os

from anthropic import Anthropic
from encord.objects.ontology_labels_impl import LabelRowV2
from fastapi import Depends, FastAPI
from typing_extensions import Annotated

from encord_agents.core.data_model import InstanceCrop
from encord_agents.core.ontology import OntologyDataModel
from encord_agents.core.utils import get_user_client
from encord_agents.fastapi.cors import EncordCORSMiddleware
from encord_agents.fastapi.dependencies import (
    FrameData,
    dep_label_row,
    dep_object_crops,
)

# Initialize FastAPI app
app = FastAPI()
app.add_middleware(EncordCORSMiddleware)

# User client and ontology setup
client = get_user_client()
project = client.get_project("d2f7665e-8767-4686-8178-0844fac37a7f")
generic_ont_obj, *other_objects = sorted(
    project.ontology_structure.objects,
    key=lambda o: o.title.lower() == "generic",
    reverse=True,
)

# Data model
data_model = OntologyDataModel(other_objects)
system_prompt = f"""
You're a helpful assistant that's supposed to help fill in 
json objects according to this schema:

`{data_model.model_json_schema_str}`

Please only respond with valid json.
"""

# Claude setup
ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
anthropic_client = Anthropic(api_key=ANTHROPIC_API_KEY)


@app.post("/object_classification")
async def classify_objects(
    frame_data: FrameData,
    lr: Annotated[LabelRowV2, Depends(dep_label_row)],
    crops: Annotated[
        list[InstanceCrop],
        Depends(dep_object_crops(filter_ontology_objects=[generic_ont_obj])),
    ],
):
    """Classify generic objects using Claude."""
    # Query Claude for each crop
    changes = False
    for crop in crops:
        message = anthropic_client.messages.create(
            model="claude-3-haiku-20240307",
            max_tokens=1024,
            system=system_prompt,
            messages=[
                {
                    "role": "user",
                    "content": [crop.b64_encoding(output_format="anthropic")],
                }
            ],
        )

        # Parse result
        try:
            instance = data_model(message.content[0].text)

            coordinates = crop.instance.get_annotation(frame=frame_data.frame).coordinates
            instance.set_for_frames(
                coordinates=coordinates,
                frames=frame_data.frame,
                confidence=0.5,
                manual_annotation=False,
            )
            lr.remove_object(crop.instance)
            lr.add_object_instance(instance)
            changes = True
        except Exception:
            import traceback

            traceback.print_exc()
            print(f"Response from model: {message.content[0].text}")

    # Save changes
    if changes:
        lr.save()

  1. Set up the FastAPI app and CORS middleware.

    main.py
    import os

from anthropic import Anthropic
from encord.objects.ontology_labels_impl import LabelRowV2
from fastapi import Depends, FastAPI
from typing_extensions import Annotated

from encord_agents.core.data_model import InstanceCrop
from encord_agents.core.ontology import OntologyDataModel
from encord_agents.core.utils import get_user_client
from encord_agents.fastapi.cors import EncordCORSMiddleware
from encord_agents.fastapi.dependencies import (
    FrameData,
    dep_label_row,
    dep_object_crops,
)

# Initialize FastAPI app
app = FastAPI()
app.add_middleware(EncordCORSMiddleware)

  2. Set up the client, Project, and extract the generic Ontology object.

    main.py
    client = get_user_client()
project = client.get_project("d2f7665e-8767-4686-8178-0844fac37a7f")
generic_ont_obj, *other_objects = sorted(
    project.ontology_structure.objects,
    key=lambda o: o.title.lower() == "generic",
    reverse=True,
)

  3. Create the data model and system prompt for Claude.

    main.py
    data_model = OntologyDataModel(other_objects)
system_prompt = f"""
You're a helpful assistant that's supposed to help fill in 
json objects according to this schema:

`{data_model.model_json_schema_str}`

Please only respond with valid json.
"""

# Claude setup
ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
anthropic_client = Anthropic(api_key=ANTHROPIC_API_KEY)

  4. Define the attribute endpoint:

main.py
@app.post("/object_classification")
async def classify_objects(
    frame_data: FrameData,
    lr: Annotated[LabelRowV2, Depends(dep_label_row)],
    crops: Annotated[
        list[InstanceCrop],
        Depends(dep_object_crops(filter_ontology_objects=[generic_ont_obj])),
    ],
):
    """Classify generic objects using Claude."""
    # Query Claude for each crop
    changes = False
    for crop in crops:
        message = anthropic_client.messages.create(
            model="claude-3-haiku-20240307",
            max_tokens=1024,
            system=system_prompt,
            messages=[
                {
                    "role": "user",
                    "content": [crop.b64_encoding(output_format="anthropic")],
                }
            ],
        )

        # Parse result
        try:
            instance = data_model(message.content[0].text)

            coordinates = crop.instance.get_annotation(frame=frame_data.frame).coordinates
            instance.set_for_frames(
                coordinates=coordinates,
                frames=frame_data.frame,
                confidence=0.5,
                manual_annotation=False,
            )
            lr.remove_object(crop.instance)
            lr.add_object_instance(instance)
            changes = True
        except Exception:
            import traceback

            traceback.print_exc()
            print(f"Response from model: {message.content[0].text}")

    # Save changes
    if changes:
        lr.save()

The endpoint:

  1. Receives frame data using FastAPI's Form dependency.
  2. Retrieves the label row using dep_label_row.
  3. Fetches object crops, filtered to include only "generic" objects, using dep_object_crops.
  4. For each crop:
    1. Sends the cropped image to Claude for analysis.
    2. Parses the response into an object instance.
    3. Replaces the generic object with the classified instance.
  5. Saves the updated label row.

Testing the Agent

  1. In your current terminal run the following command to runFastAPI server in development mode with auto-reload enabled.

    fastapi dev agent.py --port 8080

  2. Open your Project in the Encord platform and navigate to a frame you want to add a classification to. Copy the URL from your browser.

    Tip

    The url should have roughly this format: "https://app.encord.com/label_editor/{project_hash}/{data_hash}/{frame}".

  3. In another shell operating from the same working directory, source your virtual environment and test the agent:

    source venv/bin/activate
encord-agents test local object_classification '<your_url>'

  4. To see if the test is successful, refresh your browser to view the classifications generated by Claude. Once the test runs successfully, you are ready to deploy your agent. Visit the deployment documentation to learn more.

Agent Examples in the Making

The following example are being worked on:

  • Tightening Bounding Boxes with SAM
  • Extrapolating labels with DINOv
  • Triggering internal notification system
  • Label assertion