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how to suppress max value of b component

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Sarmad Paracha
Sarmad Paracha 2018-11-10
评论： Walter Roberson 2018-11-10
For fire detection algorithm for class A flames I need to apply rules on the red R, green G, and blue B component on each pixel of the frame acquired, but before that I need to suppress the maximum values (255) of the blue component image so that the flame will not be captured as a source of bright light.

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TADA
TADA 2018-11-10
编辑：TADA 2018-11-10
You can find those pixels you want to ignore first then analyze the rest
ignoreBrightnessFactor = 255;
mask = B < ignoreBrightnessFactor;
% do calculations on relevant pixels
doSomething(R(mask), G(mask), B(mask));
  2 个评论
Sarmad Paracha
Sarmad Paracha 2018-11-10
so how can i apply this now on the orignal image which should show image with suppressed b channel.
TADA
TADA 2018-11-10
If you want to simply change the blue value of those pixels you can do
%use the factor variable from above
B(B >= ignoreBrightnessFactor) = 0;
Or if you want to remove them altogether:
%use the mask vector from above
R1 = R(mask);
B1 = B(mask);
G1 = G(mask);

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更多回答（1 个）

Walter Roberson
Walter Roberson 2018-11-10
B(B==255)=0;
  2 个评论
Sarmad Paracha
Sarmad Paracha 2018-11-10
so how can i apply this now on the orignal image which should show image with suppressed b channel.

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