Hi community tech,

On Sun, 12 Mar 2017 13:34:21 +0800
community tech <commun...@dnsbed.com> wrote:

> Hi,
> 
> Giving a pic which is 5x5 pixels, I want to read the grayscale value of
> each pixel.
> which module should I use? thanks.

There's https://metacpan.org/release/GD and there are also the Perl bindings to
https://en.wikipedia.org/wiki/ImageMagick and
https://en.wikipedia.org/wiki/GraphicsMagick . Also of interest may be
https://en.wikipedia.org/wiki/GIMP and GUI frameworks such as the ones in
http://www.shlomifish.org/open-source/portability-libs/ (note that it's a page
on my site).

Good luck!

Regards,

        Shlomi Fish

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