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Type: prompter Subtype: see Settings

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Usage guidance

An image description node enriches an element’s text attribute, as does an Optical Character Recognition (OCR) enrichment. Always place the image description enrichment after the OCR enrichment, so that it overwrites the results from the OCR enrichment. For more information, see Image descriptions.
Unstructured can potentially generate image summary descriptions only for workflows that are configured as follows:
  • With a Partitioner node set to use the Auto or High Res partitioning strategy, and an image summary description node is added.
  • With a Partitioner node set to use the VLM partitioning strategy. No image summary description node is needed (or allowed).
Even with these configurations, Unstructured actually generates image summary descriptions only for files that contain images and are also eligible for processing with the following partitioning strategies:
  • High Res, when the workflow’s Partitioner node is set to use Auto or High Res.
  • VLM or High Res, when the workflow’s Partitioner node is set to use VLM.
Unstructured never generates image summary descriptions for workflows that are configured as follows:
  • With a Partitioner node set to use the Fast partitioning strategy.
  • With a Partitioner node set to use the Auto, High Res, or VLM partitioning strategy, for all files that Unstructured encounters that do not contain images.

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Settings

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subtype
string
required
Enrichment algorithm and provider. Set at the WorkflowNode level, outside of settings. Allowed values:
  • twopass_image_description — Agentic AI image description output. Best for complex images. Do not specify provider_type or model when using this subtype.
  • anthropic_image_description - VLM image description output using Anthropic.
  • bedrock_image_description - VLM image description output using Amazon Bedrock.
  • openai_image_description - VLM image description output using OpenAI.
  • vertexai_image_description - VLM image description output using Vertex AI.
The preceding list applies only to Unstructured Let’s Go and Pay-As-You-Go accounts.For Unstructured Business accounts, to get your current list of available values, contact your Unstructured account administrator or Unstructured sales representative, or request support.
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provider_type
string
required
Provider that matches the prefix of subtype. Not used with twopass_image_description. Allowed values:
  • anthropic
  • bedrock
  • openai
  • vertexai
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model
string
required
Model to use for image description. Not used with twopass_image_description. For a full list of the models available in Unstructured, see Available models.
image_description_enrichment_workflow_node = WorkflowNode(
    name="Enrichment",
    subtype="<subtype>",
    type="prompter",
    settings={
        "provider_type": "<provider-type>",
        "model": "<model>"
    }
)