magick-mogrify
Perform operations on multiple images, such as resizing, cropping, flipping, and adding effects.
TLDR
Resize all JPEG images in the directory to 50% of their initial size
$ magick mogrify -resize [50%] [*.jpg]
Resize all images starting with DSC to 800x600
$ magick mogrify -resize [800x600] [DSC*]
Convert all PNGs in the directory to JPEG
$ magick mogrify -format [jpg] [*.png]
Halve the saturation of all image files in the current directory
$ magick mogrify -modulate [100,50] [*]
Double the brightness of all image files in the current directory
$ magick mogrify -modulate [200] [*]
