Help me to find high saturation and brightness colors.

[snibgo]

Are you using HDRI? This can cause very small differences, due to IM and C code doing arithmetic differently. With integer IM, these differences are usually swamped by rounding to integers.

[el_supremo]

Version: ImageMagick 7.0.5-5 Q16 x64 2017-04-25 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2015 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Visual C++: 180040629
Features: Cipher DPC Modules OpenMP
Delegates (built-in): bzlib cairo flif freetype jng jp2 jpeg lcms lqr openexr pangocairo png ps rsvg tiff webp xml zlib

Doesn't look like HDRI is there.

Pete

[rpatelob]

I checked the output. It gives me the perfect output.
Could you notice, there is a HDRI in features.
So as @snibgo said, I think the HDRI might causes the differences.

And I have installed ImageMagick from source for Linux.

Version: ImageMagick 7.0.5-9 Q16 x86_64 2017-06-01 http://www.imagemagick.org
Copyright: © 1999-2017 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC HDRI OpenMP
Delegates (built-in): bzlib djvu fontconfig freetype gvc jbig jng jpeg lcms lqr lzma openexr png tiff wmf x xml zlib

[el_supremo]

OK. Now I'm with you. The "magick" command line program in my IM install is not HDRI enabled but I've just checked the MagickWand code (from the same package) and it has MAGICKCORE_HDRI_ENABLE defined so the command line and the program aren't exactly the same.

Pete