how to find the local maxima and minima of histogram for color image

please help me i need it immedaitely

[John D'Errico]

Don't post the same question multiple times every time you want to add some information. Posting multiple times will not get you a faster or better answer.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Answer 1

[Image Analyst]

Like we said in your duplicate question from last month, use findpeaks() in the Signal Processing Toolbox

[peakValues, peakIndexes] = findpeaks(counts);
[~, valleyIndexes] = findpeaks(-counts);
valleyValues = counts(valleyIndexes);

just do that for each histogram from each color channel.