• ImageMagick: Install using:
  • Windows: winget install -e --id ImageMagick.ImageMagick
  • macOS: brew install imagemagick
  • Ubuntu: sudo apt install imagemagick

Brightens slightly dark images, skips very dark ones, and copies ideal images.
Uses ImageMagick with gamma, modulate, level, sigmoidal contrast, and optional desaturation.
Uses a three steps pipline to do this.

./brighten.sh [--input_dir=PATH] [--output_dir=PATH] [--brightness_factor=FACTOR] [--threshold=TARGET_BRIGHT]

./brighten.sh
./brighten.sh --input_dir=./input
./brighten.sh --input_dir=./input --output_dir=./output
./brighten.sh --input_dir=./input --output_dir=./output --brightness_factor=1.2
./brighten.sh --input_dir=./input --output_dir=./output --threshold=60

• Images below threshold skipped, above threshold copied
• Adding chnaged parameters to the file name of the images.

This script processes .jpg and .jpeg images by normalizing brightness and contrast, and optionally enhancing saturation and adjusting hue based on user-defined parameters. The processed images are saved to a specified output directory.

Run the script with optional input and output directory arguments, along with optional modulate parameters:

./process_images.sh [-i input_dir] [-o output_dir] [-b brightness] [-s saturation] [-h hue]

• -i <input_dir>: Input directory for images (defaults to the current directory).
• -o <output_dir>: Output directory for processed images (defaults to processed_images).
• -b <brightness>: Brightness percentage (defaults to 101, meaning no change).
• -s <saturation>: Saturation percentage (defaults to 105, meaning 5% increase).
• -h <hue>: Hue percentage (defaults to 101, meaning no change).

1. Default behavior (process images with default settings):

   ./process_images.sh

2. Custom input and output directories:

   ./process_images.sh -i /path/to/input -o /path/to/output

3. Custom brightness, saturation, and hue values:

   ./process_images.sh -i /path/to/input -o /path/to/output -b 110 -s 120 -h 100

• The script processes .jpg and .jpeg files in the input directory.
• It applies -normalize to adjust brightness and contrast automatically.
• It enhances saturation by 5% (default -s 105) and adjusts hue as specified by the user.
• The processed images are saved in the output directory with the same filenames.
• Progress is logged every 20 images processed.

• Normalization: The -normalize option automatically adjusts the image's brightness and contrast to balance the color levels.
• Modulate: The -modulate option adjusts brightness, saturation, and hue. The default values are 101, 105, 101, which means no change in brightness, a 5% increase in saturation, and no change in hue.
• The script ensures the input directory exists and creates the output directory if necessary.
• Errors in processing individual images will not stop the script.