croping image to visible area

[Marcin S]

Hello,

a have a bundle of B/W images, size 128x64. Let me show You a sample

https://picasaweb.google.com/lh/photo/1EAL-kfbV4PdevJESGDOEW8pL2HRQALB594k7UVmewY?feat=directlink

Im trying to figure out convert command to crop out this little white
piece and resize image to croped area (it's repage command i think).
Its something like "Image->Autocrop Image" in gimp if You have it.

anyideas?

[Fred Weinhaus]

Post by Marcin S
Im trying to figure out convert command to crop out this little white
piece and resize image to croped area (it's repage command i think).
Its something like "Image->Autocrop Image" in gimp if You have it.

Your image has two frames. The second is only 1x1. So you want to
process only the first frame.

convert el-306.gif[0] -trim +repage el-306_f0_trim.gif

However, as your white spot is not rectangular, the trim will get a
bounding rectangle that will show some black as well as the white. It
should end up as 5x5 pixels in widthxheight.

see http://www.imagemagick.org/Usage/crop/#trim

[Marcin S]

That is exactly what I wanted =]

now i need to add 1px red border, but i think ill manage

Thanks

Post by Fred Weinhaus

Post by Marcin S
Im trying to figure out convert command to crop out this little white
piece and resize image to croped area (it's repage command i think).
Its something like "Image->Autocrop Image" in gimp if You have it.

Your image has two frames. The second is only 1x1. So you want to
process only the first frame.
convert el-306.gif[0] -trim +repage el-306_f0_trim.gif
However, as your white spot is not rectangular, the trim will get a
bounding rectangle that will show some black as well as the white. It
should end up as 5x5 pixels in widthxheight.
see http://www.imagemagick.org/Usage/crop/#trim
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