mogrify
Tool that allows making operations on multiple images ie. resizing, cropping, flipping, adding effects. Replaces the original file.
- Resize all jpg images in the folder to 50% of their initial size:
mogrify -resize {{50%}} {{*.jpg}}
- Resize all images starting with DSC to 800x600:
mogrify -resize {{800x600}} {{DSC*}}
- Convert all png images in the folder to jpg:
mogrify -format {{jpg}} {{*.png}}
- Halve the saturation for all image files in the folder:
mogrify -modulate {{100,50}} {{*}}
- Double the brightness for all image files in the folder:
mogrify -modulate {{200}} {{*}}