© 2021,2023 by Zack Smith. All rights reserved.
What is ImageMagick?
ImageMagick is the Swiss Army Knife of image conversion and manipulation. It can't do everything, but it can do quite a lot. It is very much a manually-operated utility and requires knowing various parameters to achieve the best image output.
Useful commands
Strip metadata from your image
convert photograph.jpg -strip output.png |
Convert photo to grayscale
convert photograph.jpg -Colorspace gray output.png |
Color negative
convert photograph.png -channel RGB -negate output.png |
Flip an image horizontally
convert photograph.png -flop output.png |
Flip an image vertically
convert photograph.png -flip output.png |
Rotate an image
convert photograph.png -rotate 90 output.png |
Swap color channels
- 0 = red channel
- 1 = green channel
- 2 = blue channel
To swap green and blue channels, it is:
convert image.png -separate +channel -swap 1,2 -combine -colorspace sRGB output.png |
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