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how to sort histogram generated count and corresponding gray value.. pls help

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ARJUN K P
ARJUN K P 2015-5-18
评论： Image Analyst 2015-5-20
m=imread('ll.bmp');
[count,gray]=imhist(m);
the answer is:
i want to sort the count and corresponding gray value..
and delete the zero count values answer like this..

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ARJUN K P
ARJUN K P 2015-5-20
编辑：ARJUN K P 2015-5-20
i got answer from :
https://www.facebook.com/thematrixcoded
the code is :
m=imread('ll.bmp');
>> [c,g]=imhist(m);
>> K=[c,g];
>> Ks=sortrows(K);
Ki=Ks(end:-1:1,:);
Ki(Ki(:,1)==0,:)=[];
>> Ki
Thanku all for supporting
  1 个评论
Image Analyst
Image Analyst 2015-5-20
It does the same thing that I did but combined the counts and gray level arrays into a single 2D array (which we didn't know you wanted to do).

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更多回答（2 个）

Image Analyst
Image Analyst 2015-5-18
Don't use gray as a variable name - it's the name of a built in function that creates a colormap, and you just blew it away.
I don't know why you need to, but to get rid of array elements with zero counts
[count, grayLevels]=imhist(m);
rowsToDelete = count == 0;
count(rowsToDelete) = [];
grayLevels(rowsToDelete) = [];
  5 个评论
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Image Analyst
Image Analyst 2015-5-19
% Sort count in descending order.
[sortedCounts, sortIndexes] = sort(count, 'descend');
% Sort grayLevels the same way.
grayLevels = grayLevels(sortIndexes);

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ARJUN K P
ARJUN K P 2015-5-19
sir you mistaken, i want sort the count in decreasing order...
eg:
before sorting
after sorting
i want ans like

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