Update README.md

README.md

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-// Commands:
+# Crop White Backgrounds from Photos
 
-`python crop_white_background.py --folder photo`
+This Python script automatically crops white (or near-white) backgrounds from scanned or photographed images. It handles scanner dust and tiny specks by using a density-based approach, ensuring only the real photo content is kept.
 
-or
+All cropped images are saved into a **`cropped`** folder inside the input folder.
 
-`python crop_white_background.py photo\*.jpg`
+---
+
+## Features
+
+- Crop white/near-white backgrounds from scanned photos.
+- Ignores scanner dust and tiny specks.
+- Supports batch processing using folders or glob patterns.
+- Saves all outputs in a `cropped` folder automatically.
+- Adjustable `threshold`, `padding`, and `min-density` parameters.
+
+---
+
+## Requirements
+
+- Python 3.8+
+- [Pillow](https://pypi.org/project/Pillow/) ≥ 9.0.0
+- [NumPy](https://pypi.org/project/numpy/) ≥ 1.22.0
+
+Install dependencies via pip:
+
+```bash
+pip install -r requirements.txt
+
+# Crop a single image
+python crop_white_background.py photo/image1.jpg
+
+# Crop a single image with custom parameters
+python crop_white_background.py photo/image1.jpg --threshold 220 --padding 20 --min-density 30
+
+# Crop all JPEG images in a folder using glob pattern
+python crop_white_background.py photo/*.jpg
+
+# Crop all images in a folder using --folder
+python crop_white_background.py --folder photo/