[solved] convert -crop gives rest images unless specify +0+0

[qubodup]

Hello,

Code: Select all

$ convert rose: -crop 70x40 +repage rose.png

creates and but I really just want the first one.

It works when I use

Code: Select all

$ convert rose: -crop 70x40+0+0 +repage rose.png

I don't understand what difference "+0+0" does. Can somebody please explain?

Cheers

[fmw42]

without the +0+0 you are getting tile cropping. see http://www.imagemagick.org/Usage/crop/#crop_tile

[qubodup]

Thanks for clarifying!

[expatmark]

More precisely, the +0+0 tells the command where to use as the top left hand corner of the cropped image.

So if you use +50+50 it will start your crop area 50 pixels from the top and 50 pixels from the left. This enables you to accurately select exactly which part of the image you want.