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How can i adjust the contrast of an image using HTML5 Canvas pixel manipulation capabilities ? I already succeeded in changing the brightness of the image quite easily, but contrast seems to be a little bit more complex.
Does anyone know of an algorithm i can follow or perhaps sample javascript code i could take ideas from ?
thanks in advance for any help regarding this issue.
Since you said you already adjusted the brightness and it sounds like all you need is the algorithm for contrast adjusting here’s a thread for a C# method (Look at Update 2), the logic of the code is sound and will work in any program:
Adjust the contrast of an image in C# efficiently – Stack Overflow