> ## Documentation Index
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# ImageDeduplication - ComfyUI Built-in Node Documentation

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

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

## Outputs

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

> 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)

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