How to detect yellow and white colors simultaneously in a live video??

I came across the codes to detect yellow and white colors from a live video. But, these are the codes that allow to detect only one color, either of them. If at all I want to detect multiple colors,yellow and white in this case, hoe can I do it?

Answer 1

[Image Analyst]

I have all kinds of color segmentation routines in my file Exchange http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 Just detect white and yellow and AND them together. Or do it in one shot:

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Threshold each channel with the right thresholds
whiteAndYellow = redChannel > redThreshold & ...
    greenChannel > greenThreshold & ...
    (blueChannel > blueThreshold1 | blueChannel < blueThreshold2);

Play around with the threshold values until you find some that work.

[Pannag Katti]

What will be the thresholds for rgb?

[Pannag Katti]

Will you post entire code which detects white and yellow simultaneously?