Reverse of -crop

[vvaz]

Hello,

I have a big set of images in various sizes and I want to get only bottom 45 pixels I can easily get rid of this row with
mogrify -crop +0-45 +repage *.tif

But how to get rid of *rest* of image and retain only those bottom 45px???

TIA

v.

[fmw42]

try

mogrify -gravity south -crop x45+0+0 +repage *.tif

[vvaz]

Thank you very much. I don't know why I didn't try this.

[anthony]

For all forms of cropping see
http://www.imagemagick.org/Usage/crop/