How does photoshop blend two images together?

Question

how-does-photoshop-blend-two-images-together

somebody could explain how photoshop combine two pictures with DIVIDE mode? i want to implement this effect in java or c++.

score 1 · Answer 1 · answered Mar 09 '12 at 08:30

1

Since multiply is this:

#define ChannelBlend_Multiply(A,B)   ((uint8)((A * B) / 255))

Divide must be:

#define ChannelBlend_Multiply(A,B)   ((uint8)((A / B) * 255))

answered Mar 09 '12 at 08:30

Pubby

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score 0 · Answer 2 · answered Mar 09 '12 at 08:31

0

This page on wikipedia should help you: http://en.wikipedia.org/wiki/Blend_modes#Divide.

Pixel operation in blending mode are quiet simple operations. So you should manage to write code with the explanations on the webpage.

answered Mar 09 '12 at 08:31

Patrice Bernassola

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score 0 · Answer 3 · answered Mar 09 '12 at 08:36

Take the three images: output and two inputs, and analyze their pixel values. You should be able to work out the formula by fitting samples from the image data data to some equations. I wouldn't make assumptions that Photoshop's divide blend is. If you like that effect, duplicate that effect.

How does photoshop blend two images together?

3 Answers3