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exclusion blend mode for grayscale images

New Here ,
Nov 15, 2020

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I was using the exclusion blend mode for blending two grayscale images. I realized the blending results are different when operating in RGB mode(R=G=B) and grayscale mode(K=some value). I looked up the adobe reference, and it seems in RGB mode the exclusion blend mode conforms with the equation detailed in the reference (a+b-2*a*b). However, in grayscale mode, it doesn't. I'm just wondering why this is the case, and how the exclusion blending operation is done in grayscale mode. Thanks.

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exclusion blend mode for grayscale images

New Here ,
Nov 15, 2020

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I was using the exclusion blend mode for blending two grayscale images. I realized the blending results are different when operating in RGB mode(R=G=B) and grayscale mode(K=some value). I looked up the adobe reference, and it seems in RGB mode the exclusion blend mode conforms with the equation detailed in the reference (a+b-2*a*b). However, in grayscale mode, it doesn't. I'm just wondering why this is the case, and how the exclusion blending operation is done in grayscale mode. Thanks.

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How to, Problem or error

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22

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Nov 15, 2020 0
New Here ,
Nov 15, 2020

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It seems in grayscale mode the exclusion blend operates like this: 1-(K1+K2-2*K1*K2). 

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