Error in image normalization

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Matlab Student
Matlab Student 2018-10-6
评论： Matlab Student 2018-10-7
Hello Team,
I have written this code to compute the normalization of a gradient image.
if true
% code
function [horDiffNorm, verDiffNorm] = normalization(H, V)
sumH = 0;
sumV = 0;
[rowsH, colsH, depthH] = size(H);
[rowsV, colsV, depthV] = size(V);
for jH = 1:1:rowsH
for iH = 1:1:colsH
for zH = 1:1:colsH
if (zH ~= iH)
sumH = sumH + power(H(jH, zH), 2);
end
end
horDiffNorm(jH, iH) = H(jH, iH)/ sqrt(double(1/(2*(colsH-1))*sumH));
end
end
end
end
I performed debugging and noticed the value of SumH reaches (255) at zH = 32 and then it stuck at 255, even though the next pixels are not 0.
Can you please help?

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采纳的回答

Walter Roberson
Walter Roberson 2018-10-6
Right after the function header put in
H = double(H) ;

更多回答（1 个）

Image Analyst
Image Analyst 2018-10-6
Why not simply use imgradient()?
  10 个评论
显示 8更早的评论
Matlab Student
Matlab Student 2018-10-7
I am trying to implement a method designed to measure the blockiness of distorted images. This methods was proposed in "A Blind Reference-Free Blockiness Measure" paper for Chunhua Chen and Jeffrey A. Bloom (Dialogic Media Labs) and was published in 2010.
Matlab Student
Matlab Student 2018-10-7
I have already written the code, but while testing/ debugging it still need some modifications.

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