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* Update versionedReferenceLinks.js * fixing all links * github-hanlp-swap --------- Co-authored-by: Stefano Fiorucci <stefanofiorucci@gmail.com>
163 lines
6.7 KiB
Plaintext
163 lines
6.7 KiB
Plaintext
---
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title: "CohereDocumentImageEmbedder"
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id: coheredocumentimageembedder
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slug: "/coheredocumentimageembedder"
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description: "`CohereDocumentImageEmbedder` computes the image embeddings of a list of documents and stores the obtained vectors in the embedding field of each document. It uses Cohere embedding models with the ability to embed text and images into the same vector space."
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---
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# CohereDocumentImageEmbedder
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`CohereDocumentImageEmbedder` computes the image embeddings of a list of documents and stores the obtained vectors in the embedding field of each document. It uses Cohere embedding models with the ability to embed text and images into the same vector space.
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| -------------------------------------- | ---------------------------------------------------------------------------------------- |
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| **Most common position in a pipeline** | Before a [`DocumentWriter`](../writers/documentwriter.mdx) in an indexing pipeline |
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| **Mandatory init variables** | "api_key": The Cohere API key. Can be set with `COHERE_API_KEY` or `CO_API_KEY` env var. |
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| **Mandatory run variables** | "documents": A list of documents, with a meta field containing an image file path |
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| **Output variables** | "documents": A list of documents (enriched with embeddings) |
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| **API reference** | [Cohere](/reference/integrations-cohere) |
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| **GitHub link** | https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/cohere |
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## Overview
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`CohereDocumentImageEmbedder` expects a list of documents containing an image or a PDF file path in a meta field. The meta field can be specified with the `file_path_meta_field` init parameter of this component.
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The embedder efficiently loads the images, computes the embeddings using a Cohere model, and stores each of them in the `embedding` field of the document.
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`CohereDocumentImageEmbedder` is commonly used in indexing pipelines. At retrieval time, you need to use the same model with a `CohereTextEmbedder` to embed the query, before using an Embedding Retriever.
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This component is compatible with Cohere Embed models v3 and later. For a complete list of supported models, see the [Cohere documentation](https://docs.cohere.com/docs/models#embed).
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### Installation
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To start using this integration with Haystack, install the package with:
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```shell
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pip install cohere-haystack
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```
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### Authentication
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The component uses a `COHERE_API_KEY` or `CO_API_KEY` environment variable by default. Otherwise, you can pass an API key at initialization with a [Secret](../../concepts/secret-management.mdx) and `Secret.from_token` method:
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```python
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embedder = CohereTextEmbedder(api_key=Secret.from_token("<your-api-key>"))
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```
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To get a Cohere API key, head over to https://cohere.com/.
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## Usage
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### On its own
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Remember to set `COHERE_API_KEY` as an environment variable first.
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```python
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from haystack import Document
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from haystack_integrations.components.embedders.cohere import CohereDocumentImageEmbedder
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embedder = CohereDocumentImageEmbedder(model="embed-v4.0")
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embedder.warm_up()
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documents = [
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Document(content="A photo of a cat", meta={"file_path": "cat.jpg"}),
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Document(content="A photo of a dog", meta={"file_path": "dog.jpg"}),
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]
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result = embedder.run(documents=documents)
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documents_with_embeddings = result["documents"]
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print(documents_with_embeddings)
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## [Document(id=...,
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## content='A photo of a cat',
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## meta={'file_path': 'cat.jpg',
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## 'embedding_source': {'type': 'image', 'file_path_meta_field': 'file_path'}},
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## embedding=vector of size 1536),
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## ...]
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```
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### In a pipeline
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In this example, we can see an indexing pipeline with three components:
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- `ImageFileToDocument` converter that creates empty documents with a reference to an image in the `meta.file_path` field;
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- `CohereDocumentImageEmbedder` that loads the images, computes embeddings and store them in documents;
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- `DocumentWriter` that writes the documents in the `InMemoryDocumentStore`.
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There is also a multimodal retrieval pipeline, composed of a `CohereTextEmbedder` (using the same model as before) and an `InMemoryEmbeddingRetriever`.
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```python
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from haystack import Pipeline
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from haystack.components.converters.image import ImageFileToDocument
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from haystack.components.retrievers.in_memory import InMemoryEmbeddingRetriever
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from haystack.components.writers import DocumentWriter
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from haystack.document_stores.in_memory import InMemoryDocumentStore
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from haystack_integrations.components.embedders.cohere import CohereDocumentImageEmbedder, CohereTextEmbedder
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document_store = InMemoryDocumentStore()
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## Indexing pipeline
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indexing_pipeline = Pipeline()
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indexing_pipeline.add_component("image_converter", ImageFileToDocument())
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indexing_pipeline.add_component(
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"embedder",
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CohereDocumentImageEmbedder(model="embed-v4.0")
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)
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indexing_pipeline.add_component(
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"writer", DocumentWriter(document_store=document_store)
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)
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indexing_pipeline.connect("image_converter", "embedder")
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indexing_pipeline.connect("embedder", "writer")
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indexing_pipeline.run(data={"image_converter": {"sources": ["dog.jpg", "hyena.jpeg"]}})
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## Multimodal retrieval pipeline
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retrieval_pipeline = Pipeline()
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retrieval_pipeline.add_component(
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"embedder",
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CohereTextEmbedder(model="embed-v4.0")
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)
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retrieval_pipeline.add_component(
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"retriever",
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InMemoryEmbeddingRetriever(document_store=document_store, top_k=2)
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)
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retrieval_pipeline.connect("embedder.embedding", "retriever.query_embedding")
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result = retrieval_pipeline.run(data={"text": "man's best friend"})
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print(result)
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## {
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## 'retriever': {
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## 'documents': [
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## Document(
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## id=0c96...,
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## meta={
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## 'file_path': 'dog.jpg',
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## 'embedding_source': {
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## 'type': 'image',
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## 'file_path_meta_field': 'file_path'
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## }
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## },
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## score=0.288
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## ),
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## Document(
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## id=5e76...,
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## meta={
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## 'file_path': 'hyena.jpeg',
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## 'embedding_source': {
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## 'type': 'image',
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## 'file_path_meta_field': 'file_path'
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## }
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## },
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## score=0.248
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## )
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## ]
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## }
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## }
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```
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## Additional References
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:notebook: Tutorial: [Creating Vision+Text RAG Pipelines](https://haystack.deepset.ai/tutorials/46_multimodal_rag)
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