Automated Image Classification with KNN and Vector Databases
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Leverage the power of AI for intelligent image classification. This workflow automates the process of embedding images and querying a vector database using a K-Nearest Neighbors (KNN) approach to identify and categorize your visual assets.
About This Workflow
This n8n workflow provides a robust solution for automated image classification, perfect for organizing and understanding large image datasets. It begins by generating dense vector embeddings for images using a sophisticated multimodal embedding model. These embeddings are then used to query a Qdrant vector database, retrieving the most similar image data points based on the KNN algorithm. A 'Majority Vote' logic is applied to the top results to determine the most probable classification, ensuring accuracy. The workflow intelligently handles potential ties by iteratively increasing the KNN search limit until a definitive classification is achieved or a predefined threshold is met, offering a scalable and reliable image categorization system.
Key Features
- Multimodal Image Embedding: Converts images into high-dimensional vector representations for semantic understanding.
- KNN Similarity Search: Efficiently finds the most relevant image matches within a vector database.
- Automated Majority Voting: Determines the most likely classification based on the nearest neighbors.
- Tie-Breaking Mechanism: Intelligently expands search to resolve classification ambiguities.
- Seamless Integration: Connects Voyage AI embeddings with Qdrant vector storage.
How To Use
- Configure Voyage API Credentials: Set up your Voyage API key in n8n for the 'Voyage API' credential type.
- Configure Qdrant Credentials: Provide your Qdrant Cloud URL and API key in n8n for the 'QdrantApi account' credential type.
- Set Initial Variables: In the 'Qdrant variables + embedding + KNN neigbours' node, configure your
qdrantCloudURL,collectionName, and an initiallimitKNN(e.g., 10). - Input Image and Query: The 'Image Test URL' node expects an
imageURLin its input JSON. The 'Embed image' node will then generate the embedding. - Query Vector Database: The 'Query Qdrant' node uses the generated embedding to search your specified collection.
- Majority Vote & Tie Resolution: The 'Majority Vote' and 'Check tie' nodes process the query results, determining the classification and iteratively increasing
limitKNNif needed. - Output Classification: The 'Return class' node outputs the final determined classification.
Apps Used
Workflow JSON
{
"id": "b6b12fe8-ab4f-4d81-9230-41a128dc6c5e",
"name": "Automated Image Classification with KNN and Vector Databases",
"nodes": 14,
"category": "Operations",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: b6b12fe8-ab4f...
About the Author
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