How to detect yellow color from YCbCr color space using Cb component along with the histogram algorithm given?

Answer 1

[Image Analyst]

Try the Color Thresholder App on the Apps tab of the tool ribbon. Load your image and tell it to do the segmentation in YCbCr color space.

It may not be so easy. OK, so you can find yellow, but what if there were a school bus or two in the field of view?

[Md Ashraf]

yes, it is too difficult. But I have to solve the problem according the given algorithm.

And I solve it. Thanks for your answer.

I = imread('f00001.png');
J = rgb2ycbcr(I);
CB = J(:,:,2);
histCB = imhist(CB)/numel(CB);
CCB = zeros(size(histCB));
for i = 1:length(CCB)
    CCB(i) = sum(histCB(1:i));
end
inx = find(CCB < 0.01,1,'last');
B = CB <= inx-1;
figure,imshow(B)

[Image Analyst]

You're welcome. Can you then click the "Accept this answer" link? You might want to look at the other image processing demos in my FIle Exchange, including some on color segmentation. Click for Image Analyst's File Exchange

[Md Ashraf]

I also vote you.