how to eliminate white pixels(smoke pixels) in the rgb image

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senthil vadivu
senthil vadivu 2016-12-8
回答： Gautam 2024-10-24，6:06
how to eliminate white pixels(smoke pixels) in the rgb image

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Gautam
Gautam 2024-10-24，6:06
Hello @senthil vadivu
You can eliminate white pixels from an RGB image by identifying these pixels and then replacing them with a suitable value, such as the background color or making them transparent. This can be done in two steps
  1. Identify White Pixels: Define a threshold to identify white pixels based on their RGB values.
  2. Replace White Pixels: Replace these identified pixels with another color or make them transparent.
img = imread(image);
whiteThreshold = 240;
% Create a mask for white pixels
whiteMask = img(:,:,1) > whiteThreshold & img(:,:,2) > whiteThreshold & img(:,:,3) > whiteThreshold;
%Replace white pixels with black (or any other color)
replacementColor = [0, 0, 0];
img(repmat(whiteMask, [1, 1, 3])) = repmat(reshape(replacementColor, [1, 1, 3]), sum(whiteMask(:)), 1);

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