I Built a Multimodal RAG Agent in n8n #n8n #rag #aiagents

The AI AutomatorsAbout 2 min readJun 30, 2025Watch original
THE SUMMARYAI-generated

Key Concepts:

  • Multimodal Agents: Agents capable of processing multiple data types (text, images, tables).
  • OCR (Optical Character Recognition): Technology to extract text from images.
  • AI Vision Model: AI that understands the content of images.
  • Superbase: A platform used for image storage.
  • Chunking: Dividing data into smaller segments.
  • Embeddings: Numerical representations of data used to create vectors.
  • Vector Database: A database optimized for storing and querying vectors.

Multimodal Agent for PDF Analysis

The video discusses building a multimodal agent that can analyze text, images, and tables from complex PDFs at scale, making agents more useful.

OCR and Image Understanding

The process begins by sending PDF documents to Mistral's OCR API. This API extracts images and annotates them. Crucially, it uses an AI vision model to understand the content of the images, providing context for the agent's answers. This functionality works for both machine-readable and scanned PDFs.

Data Storage and Retrieval

After the data is extracted, the images are uploaded to Superbase for storage. This allows the agent to retrieve them later as needed.

Data Processing and Vectorization

The extracted data is then chunked into smaller segments. Embeddings are created from these chunks, and these embeddings are used to create vectors. These vectors are stored in a vector database.

Agent Query and Response

When a message is sent to the agent, it triggers a simple agent that queries the vector database. The query returns the top results, and the agent renders the text and images to the user.

Conclusion

The video presents a method for creating a multimodal agent capable of analyzing complex PDFs by combining OCR, AI vision, data chunking, vector embeddings, and a vector database. This allows the agent to understand and respond to queries based on both text and image data within the PDFs.

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