Legacy ImageMagick Discussions Archive

Hi everyone! I hope you are well during this crazy time. I'm having an oddity with histogram output: convert in.jpg -alpha off -depth 8 -flatten -separate -append -strip -define histogram:unique-colors=false histogram:histo.gif is outputting a fine global histogram, except it has a huge spike in the ...

I just realized that histograms would make a lot more sense if the Y axis showed the percentage of pixels at a particular intensity, rather than a pixel count. I can't conceive of a counterargument at this time, though presumably a count can be useful as well. But if we defaulted to percentage, then ...

If you: convert filename.psb[0] output.jpg and the file was saved WITHOUT maximizing compatibility, it renders a horribly inaccurate mess of a file, when in fact it should fail totally and report that no data was found. Thanks for your attention to this matter, and for this wonderful software! This ...

It appears it failed this test only:

checking for jpeg_read_header in -ljpeg... no

I built JPEG per Magick’s instructions, moved it into the IM directory, then built IM. It saw it fine it just failed to include it because it didn’t pass all tests (see above).

This is the best thread on this topic - http://www.imagemagick.org/discourse-server/viewtopic.php?t=13145 I have tried per Magick's instructions but the JPEG build fails when IM build is attempted: checking for JPEG... checking jconfig.h usability... yes checking jconfig.h presence... yes checking ...

Did you ever solve this? I am also struggling.

I am trying this but it will not configure with JPEG or LCMS with this command: ./configure --disable-shared --disable-installed --without-magick-plus-plus --without-perl --without-bzlib --without-fftw --without-fontconfig --without-freetype --with-jpeg=yes --with-lcms=yes --without-openexr ...

Thanks, Fred. But will this create a self-contained portable binary I can distribute with my software? That is my aim.

Hi there! Thanks to all for such wonderful work and collaboration. I'm writing in hopes of finding someone intimate with the build process who can build a macOS binary of ImageMagick 7.x whose sole purpose is to extract embedded previews from Photoshop files: filename.psd[0] I believe this only ...

You're very kind to share your thoughts. Thank you for your time! - J

I get this when running a convert command with OpenCL variant of 6.9.6-5: Assertion failed: (cache_info->opencl != (OpenCLCacheInfo *) NULL), function GetOpenCLEvents, file magick/cache.c, line 1699. Abort trap: 6 Can anyone explain what this means, and if there might be a way to address the issue ...

thanks so much! I didn't know of the "time" command! : )

I simply want to compare two images and know if they are visually different at all. (They will be the same size.)

I know of the AE compare metric, of IM image signatures... but what is the FASTEST method to do this?

Thanks for your consideration!

- J

I've submitted a ticket to the Macports team and this is the thread detailing the issues and progress:

https://trac.macports.org/ticket/47911