Legacy ImageMagick Discussions Archive

I recently upgraded to the latest ImageMagick - 6.8.9, from 6.2.x, and have since noticed some odd things.

The biggest perplexity is in cropping. I am converting a ps file to png, like so:
convert -resize 512x512 -crop 256x256 image.ps image.png

Previously, this created 4 images that were each 256x256. However, now with the latest version, I am getting 9 (3x3) unequally sized dimension images. I am thoroughly confused.
Can someone offer any suggestions?

I've noticed some other differences as well, but this is the one I'm having trouble getting around.

There have been many changes since that very old version.

Syntax ordering is now more logical: read an input, process it, output it. Thus: Old syntax may work, but don't count on it.

What size is the image after "-resize 512x512"? If it was exactly 512x512, the crop should give four equal-size images. This will happen only if the input is square. To force the resize to be exactly 512x512, use a "!" suffix: Your shell may need the "!" to be escaped.

See: http://www.imagemagick.org/script/comma ... ptions.php and http://www.imagemagick.org/script/comma ... essing.php etc.

Okay, I see.

So, i was successful in creating the equal 4 images like so: But, that was a simplified version of what I need to do. It looks like when I add in -trim, it doesn't work the way I expect: I need to trim the white space before resizing. Thanks for your help!

I see that I need to add the +repage, since the trim option caries over the original dimensions... I think I"m good now!