Legacy ImageMagick Discussions Archive

I'd like to set the gravity depending on the size of the image.
I tried fx and set:option, but IM reported errors.

I could solve that problem with additional code, but I would prefer a pure IM solution.
Is there a way to achieve this?

convert -units PixelsPerInch $infile \
-background white ...

Version: ImageMagick 7.0.7-25 Q8 x86_64 2018-03-05 http://www.imagemagick.org
Copyright: © 1999-2018 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC HDRI OpenMP

The following problem is most likely based on my IM version. I consulted the ...

Version: ImageMagick 6.9.4-1 Q16 x86_64 2016-05-17 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2016 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP
Delegates (built-in): bzlib freetype jng jp2 jpeg lcms ltdl lzma png ...

Thank you, that set me on the right track.

As it turns out, using "-depth 8" only is sufficient, as this allows the gray-max-value to reach 255.

I wasn't aware that the "depth" is related to the min/max values.

Gray:
min: 0 (0)
max: 255 (1)
mean: 228.765 (0.897117)
standard deviation: 77 ...

Version: ImageMagick 6.9.4-1 Q16 x86_64 2016-05-17 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2016 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP
Delegates (built-in): bzlib freetype jng jp2 jpeg lcms ltdl lzma png ...

Hello,

I process scanned pages of text. Some of these pages show blue pen notes, which I want to replace with another colour.

Every pixel within a blue pen note shows a higher value in the Blue channel, compared to Red and Green channels. I'd like to use this ratio as a pixel selector, as this is ...

Version: ImageMagick 6.9.4-1 Q8 x86_64 2016-05-11 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2016 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP
Delegates (built-in): bzlib freetype jng jp2 jpeg lcms ltdl lzma png ...

Yay, it works.

Thanks!

Thanks, I had to use compile IM 7 on OSX for that.

Version: ImageMagick 7.0.1-1 Q8 x86_64 2016-05-08 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2016 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC HDRI
Delegates (built-in): bzlib ...

Hello,

I am trying add a border on a specific side. And the border width has to depend on the dimensions of the current image.

The two snippets below result in an error "mogrify: invalid argument for ...".
Obviously the fx is not allowed here.
I read that distort would allow for adding borders ...

That works well, thank you both for your help

Version: ImageMagick 6.9.3-7 Q8 x86_64 2016-04-29 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2016 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP
Delegates (built-in): bzlib freetype jng jp2 jpeg lcms ltdl lzma png ...