deepset-ai--haystack/docs-website/versioned_docs/version-2.21/pipeline-components/embedders/coheredocumentimageembedder.mdx

---
title: "CohereDocumentImageEmbedder"
id: coheredocumentimageembedder
slug: "/coheredocumentimageembedder"
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."
---

# CohereDocumentImageEmbedder

`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.

<div className="key-value-table">

|  |  |
| --- | --- |
| **Most common position in a pipeline** | Before a [`DocumentWriter`](../writers/documentwriter.mdx) in an indexing pipeline                |
| **Mandatory init variables**           | `api_key`: The Cohere API key. Can be set with `COHERE_API_KEY` or `CO_API_KEY` env var. |
| **Mandatory run variables**            | `documents`: A list of documents, with a meta field containing an image file path        |
| **Output variables**                   | `documents`: A list of documents (enriched with embeddings)                              |
| **API reference**                      | [Cohere](/reference/integrations-cohere)                                                        |
| **GitHub link**                        | https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/cohere |

</div>

## Overview

`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.

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.

`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.

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).

### Installation

To start using this integration with Haystack, install the package with:

```shell
pip install cohere-haystack
```

### Authentication

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:

```python
embedder = CohereTextEmbedder(api_key=Secret.from_token("<your-api-key>"))
```

To get a Cohere API key, head over to https://cohere.com/.

## Usage

### On its own

Remember to set `COHERE_API_KEY` as an environment variable first.

```python
from haystack import Document
from haystack_integrations.components.embedders.cohere import (
    CohereDocumentImageEmbedder,
)

embedder = CohereDocumentImageEmbedder(model="embed-v4.0")
embedder.warm_up()

documents = [
    Document(content="A photo of a cat", meta={"file_path": "cat.jpg"}),
    Document(content="A photo of a dog", meta={"file_path": "dog.jpg"}),
]

result = embedder.run(documents=documents)
documents_with_embeddings = result["documents"]
print(documents_with_embeddings)

## [Document(id=...,
## content='A photo of a cat',
## meta={'file_path': 'cat.jpg',
## 'embedding_source': {'type': 'image', 'file_path_meta_field': 'file_path'}},
## embedding=vector of size 1536),
## ...]
```

### In a pipeline

In this example, we can see an indexing pipeline with three components:

- `ImageFileToDocument` converter that creates empty documents with a reference to an image in the `meta.file_path` field;
- `CohereDocumentImageEmbedder` that loads the images, computes embeddings and store them in documents;
- `DocumentWriter` that writes the documents in the `InMemoryDocumentStore`.

There is also a multimodal retrieval pipeline, composed of a `CohereTextEmbedder` (using the same model as before) and an `InMemoryEmbeddingRetriever`.

```python
from haystack import Pipeline
from haystack.components.converters.image import ImageFileToDocument
from haystack.components.retrievers.in_memory import InMemoryEmbeddingRetriever
from haystack.components.writers import DocumentWriter
from haystack.document_stores.in_memory import InMemoryDocumentStore

from haystack_integrations.components.embedders.cohere import (
    CohereDocumentImageEmbedder,
    CohereTextEmbedder,
)

document_store = InMemoryDocumentStore()

## Indexing pipeline
indexing_pipeline = Pipeline()
indexing_pipeline.add_component("image_converter", ImageFileToDocument())
indexing_pipeline.add_component(
    "embedder",
    CohereDocumentImageEmbedder(model="embed-v4.0"),
)
indexing_pipeline.add_component("writer", DocumentWriter(document_store=document_store))
indexing_pipeline.connect("image_converter", "embedder")
indexing_pipeline.connect("embedder", "writer")

indexing_pipeline.run(data={"image_converter": {"sources": ["dog.jpg", "hyena.jpeg"]}})

## Multimodal retrieval pipeline
retrieval_pipeline = Pipeline()
retrieval_pipeline.add_component("embedder", CohereTextEmbedder(model="embed-v4.0"))
retrieval_pipeline.add_component(
    "retriever",
    InMemoryEmbeddingRetriever(document_store=document_store, top_k=2),
)
retrieval_pipeline.connect("embedder.embedding", "retriever.query_embedding")

result = retrieval_pipeline.run(data={"text": "man's best friend"})
print(result)

## {
## 'retriever': {
## 'documents': [
## Document(
## id=0c96...,
## meta={
## 'file_path': 'dog.jpg',
## 'embedding_source': {
## 'type': 'image',
## 'file_path_meta_field': 'file_path'
## }
## },
## score=0.288
## ),
## Document(
## id=5e76...,
## meta={
## 'file_path': 'hyena.jpeg',
## 'embedding_source': {
## 'type': 'image',
## 'file_path_meta_field': 'file_path'
## }
## },
## score=0.248
## )
## ]
## }
## }
```

## Additional References

:notebook: Tutorial: [Creating Vision+Text RAG Pipelines](https://haystack.deepset.ai/tutorials/46_multimodal_rag)