How to extract RGB information from an segmented image excluded white background.
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Hi, I am working on project about image processing. I would like to know about how to extract the RGB information from an segmented image excluded the white background. I only need the RGB value for my region of interest, and I don't want the white pixels RGB value to exist in my data file. Thank you.
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Image Analyst
2017년 7월 22일
Get a mask of where white is, then extract pixels from where it's not white
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
whiteMask = redChannel == 255 & greenChannel == 255 & blueChannel == 255;
redValues = redChannel(~whiteMask);
greenValues = greenChannel(~whiteMask);
blueValues = blueChannel(~whiteMask);
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Image Analyst
2017년 7월 22일
Note, if white is just bright areas, then you don't have to use just pure 255, it can be any values above some intensity that you consider "white", so for example you can do:
whiteMask = redChannel >= 200 & greenChannel >= 225 & blueChannel >= 230;
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KALYAN ACHARJYA
2017년 7월 22일
편집: KALYAN ACHARJYA
2017년 7월 22일
You can directly calculate the R G B from the image, Apply If R=255, G=255, B=255, then ignore the region else ...do your program. Similar Image is needed for more clarification.
Please note: I am beginner in Matlab
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