> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# ImageDeduplication - ComfyUI Built-in Node Documentation

> Complete documentation for the ImageDeduplication node in ComfyUI. Learn its inputs, outputs, parameters and usage.

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/ImageDeduplication/en.md)

This node removes duplicate or very similar images from a batch. It works by creating a perceptual hash for each image—a simple numerical fingerprint based on its visual content—and then comparing them. Images whose hashes are more similar than a set threshold are considered duplicates and filtered out.

## Inputs

| Parameter              | Data Type | Required | Range     | Description                                                                                                                   |
| ---------------------- | --------- | -------- | --------- | ----------------------------------------------------------------------------------------------------------------------------- |
| `images`               | IMAGE     | Yes      | -         | The batch of images to process for deduplication.                                                                             |
| `similarity_threshold` | FLOAT     | No       | 0.0 - 1.0 | Similarity threshold (0-1). Higher means more similar. Images above this threshold are considered duplicates. (default: 0.95) |

## Outputs

| Output Name | Data Type | Description                                          |
| ----------- | --------- | ---------------------------------------------------- |
| `images`    | IMAGE     | The filtered list of images with duplicates removed. |