[Gambas-user] Color Range

[Claus Dietrich]

Am 26.07.23 um 11:01 schrieb Benoit Minisini:
>
> I don't understand: do you want -automatic- or -manual- processing?
>
> If you want manual processing, I can add a function that applies a 
> "curve" to the image components (red, green, blue, alpha, value...) 
> but I won't make a GUI for defining the curve like the GIMP has. It's 
> up to you.
>
> Regards,
>
> -- 
> Benoît Minisini.

Dear Benoít

Sorry that I mailed you directly. I forgot to change the addressee.

In order to demonstrate the current limitations of Gambas and to show 
how the proposed feature could improve aged photos, I took a fraction of 
a less private old photo for my assessment application and offer it in 
the cloud for download: https://magentacloud.de/s/RHdt5YgwKYgQMwC

Please refer to the histograms which will provide you with an indication 
how they have to be stretched (manually and individually) for better 
results. If this is convincing you and if there is no other solution I 
suggest to have a look into the histogram-stretching routine of the 
"Normalize" method in kimageeffects.cpp. According to my observation it 
might by usable for the purpose.

With best regards

Claus