imagemagick
imagemagick
Table of Contents
1 position
start point
0,0 – NorthWest
2 Cropping multiple images in batch mode
2.1 intro
tools: GIMP and mogrify (from the ImageMagick suite),
- GIMP – graphically select the area to be cropped
- mogrify – cropping.
mogrify -gravity North -chop 0x300 gap0.25ur3.92.jpg # remove 300 rows of pixels from the top
convert -crop 240x160+100+50 input.jpg output.jpg
convert -crop 1547x465+186+307 input.jpg output.jpg
convert -crop 388x148+380+622 input.jpg output.jpg
mogrify -gravity East -chop 960x0 *.jpg
| mogrify | overwrites the existing image |
| convert | saves the image as a new image without modifying the original image |
mogrify -gravity North -chop 0x300 *.jpg mogrify -gravity South -chop 0x300 *.gif
| North | South | West | East |
mogrify -gravity West -chop 150x0 *.gif
1 pixel (X) = 0.0264583333 cm
pixel –>> cm https://www.blitzresults.com/en/pixel/
The asterisk makes bash fill in all png files in the current directory, and mogrify will handle them all happily.
2.2 cache resources exhausted
mogrify-im6.q16: cache resources exhausted `gap0.25ur3.92.gif' @ error/cache.c/OpenPixelCache/3984.
/etc/ImageMagick-6/policy.xml
change memory
3 combine side by side
- Montage: Generate a thumbnail index of a list of images
montage 1.png 2.png -geometry 1920x1080+1+1 -quality 100 out.png montage 1.jpg 2.jpg 3.jpg 4.jpg -tile 2x2 -geometry +0+0 out.jpg
| geometry | size of the individual thumbnail images, and the spacing between them |
