Legacy ImageMagick Discussions Archive

Ah seems to be what I was looking for, thanks
(I tested PNM files, and they're nice, but getting them into nice dimensions wasn't as pretty as I liked, and it inevitably involves changing the file format.)

Ah, using RGB:out seems to make the bits end up with the correct value. (if I use sRGB: it gives blank output on my version (6.7.7.10)) But, how would I extract one channel and compact that to pixel-per-byte, can I do it in ImageMagick? I've been trying things back and forth, I'm guessing I'm ...

It seems like this issue crops up not only when converting from XPM, I created two PNG files, the first one "bad" is a convert XPM->PNG in GIMP, the "good" one is ImageMagick-extracted from the old "-depth 8 gray" binary file (which was previously generated from the XPM files). When I open these two ...

I tried adding -colorspace sRGB/RGB/Gray without any difference (before input, before output, before both...)

I'm not sure that this is the issue, ot seems more like a general loss of brightness, or truncation of all colours into some lower depth in the process of reading of the XPM file, throughout the whole image. For example convert gfx1.xpm -depth 8 gray:- >> result.bin results in these raw values ...

Hi, In version 6.7.7.10 (and 6.7.9.3) of imagemagick I've discovered what I assume is a regression: When converting these xpm files to another format (e.g. png, or -depth 8 gray in my case) they change noticably, something which did not happen in version 6.6.9.7 http://ubuntuone.com ...

Yep, works on 6.6.9-5 for me too.
Fails on 6.6.0-4 which is the current on Debian (sid included).
So that's entirely a packaging matter.
Sorry for noise

- arand

Source image (original has questionable copyright regarding stand-alone distribution, hence modified beyond recognition): http://ubuntuone.com/p/nCG/ When trying to extract the largest 128x128 layer using: convert image.ico[3] image.png It produces convert: No IDATs written into file `image.png ...

Hmm, that still does not produce a pixel-perfect result like gimp's. But it seems that my problem lies in fact that a simple convert danger_nm.jpg danger_nm_im.jpg Does not produce a clone, but a slightly altered version. Even if -quality 100 is used there are a few pixels not matching the original ...

I am trying to replace/remove colour profiles in a set of images that have a HP copyright embedded in them (default photoshop stuff I guess). I have tested to do this with GIMP, at it seems to manage to apply just a general colour profile without changing the image (pixel perfect). However when I ...