how can i generate the histogram of an hsv image?

Question

Josephine 2013-12-17

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https://ww2.mathworks.cn/matlabcentral/answers/109980-how-can-i-generate-the-histogram-of-an-hsv-image

评论： Image Analyst 2013-12-17

hi i wanna generate the histogram of an hsv image without using the hist function of matlab. can someone give me an algorithm or a step-by-step process on this? thanks in advance.

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Image Analyst 2013-12-17

Why? What do you have against hist? Is imhist or histc okay?

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Answer 1

Walter Roberson 2013-12-17

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https://ww2.mathworks.cn/matlabcentral/answers/109980-how-can-i-generate-the-histogram-of-an-hsv-image#answer_118590

在 MATLAB Online 中打开

counters = zeros(1,10);
Hpart = YourImageAsHSV(:,:,1);
for K = 1 : numel(Hpart)
  if Hpart(K) < 255/10
    counters(1) = counters(1) + 1;
  elseif Hpart(K) < 2*255/10
    counters(2) = counters(2) + 1;
  elseif Hpart(K) < 3*255/10
    counters(3) = counters(3) + 1;
  elseif Hpart(K) < 4*255/10
    ....
  else
    counters(10) = counters(10) + 1;
  end
end