spread_correlation
Detect hidden data in images by analyzing autocorrelation of pixel values to identify periodic embedding patterns used in spread spectrum steganography.
Instructions
Autocorrelation-based steganography detection. Computes the autocorrelation of pixel values to find periodic embedding patterns. Spread spectrum and watermarking methods often introduce periodic signals that appear as peaks in the autocorrelation function.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| channel | No | Color channel to analyze: 0=R, 1=G, 2=B (default: 0) | |
| max_lag | No | Maximum lag to compute (default: 512) | |
| file_path | Yes | Path to image file (PNG or JPEG) for autocorrelation analysis |