How can I convert an image to grayscale via the command line? [closed]
If you have imagemagick
installed,
convert source.jpg -colorspace Gray destination.jpg (true grayscale only)convert source.jpg -monochrome destination.jpg (true black and white)convert source.jpg -separate destination.jpg (separate into gray channels)
If you don't care about losing the original file: mogrify -colorspace Gray file
.
use one of: -monochrome
or -colorspace gray
options for imagemagick
(convert
).