Monday, February 20, 2017

irfanview - How can I see what Irfan View did to my original image?


I used Irfan View's "Auto Adjust Colors" to remove yellow tint in bathroom image under. But I want see all changes and steps so I can learn myself what variables to adjust.


enter image description here



Answer




Just look at the histograms before and after.


enter image description here


So basically the adjustment was just black point adjustment per channel, and white point per channel (so spread colors across full range).


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