README.md

metadata

title: Image File Compare
emoji: 🔍
colorFrom: blue
colorTo: purple
sdk: streamlit
sdk_version: 1.36.0
app_file: app.py
pinned: false
license: mit

🔍 Image File Compare

A web-based tool for comparing two images with threshold-based difference detection.

Features

• Multi-format support — TIFF, FITS, PNG, JPG, BMP
• Threshold control — Adjustable slider to filter noise and focus on meaningful differences
• Auto-scaling — When image sizes differ, automatically scales one to match (configurable method)
• Multiple scaling algorithms — Nearest, Bilinear, Bicubic, Lanczos, Area
• Difference visualization:
  • Actual difference image (with optional amplification)
  • Binary mask (white = pixels exceeding threshold)
  • Colored overlay (red = differences)
  • Overlay blended on original image
• Download outputs — All result images downloadable as PNG or TIFF
• Statistics — Pixel count, percentage, max/mean difference values

Usage

1. Upload two images (supports TIF, FITS, PNG, JPG, BMP)
2. Adjust the difference threshold in the sidebar
3. If sizes differ, choose a scaling method and which image to resize
4. View results: difference image, binary mask, colored overlay
5. Download any output using the download buttons at the bottom

Running Locally

pip install -r requirements.txt
streamlit run app.py