Imagemagick chop 30px off each edge (variable width and height)

问题

I need to chop 30px off each side (top bottom left right). I've tried crop and also -chop 30x30 but that only seems to work on one side;

convert -verbose -density 150 -trim pdfs/test/test.pdf -quality 80  -chop 30x30 images/agents/test/temp/test.jpg

回答1:

If it's an even amount on both sides of a dimension, then the command you want is -shave

convert -verbose -density 150 -trim pdfs/test/test.pdf -quality 80 -shave 30x30 images/agents/test/temp/test.jpg

来源：https://stackoverflow.com/questions/12200763/imagemagick-chop-30px-off-each-edge-variable-width-and-height