can some help me please with Otsu thresholding matlab code in which the dimensions, width, height, of the output image is equal to the orignal image (input image). Thanks in advance.

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Arshad Ali 2018-11-22

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评论： Arshad Ali 2018-11-24

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Walter Roberson 2018-11-24

how are you saving the output image ?

Arshad Ali 2018-11-24

i found my mistake instead of using imwrite() command i save images directly . when i used imwrite() command it save image with original dimension .. Thank you Walter Roberson. Thank you so much..

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KALYAN ACHARJYA 2018-11-22

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Hello Arshad, otsu thresolding techniqie is very popular thresholding approach in image segmentation domain. I have posted the following code from Gonzalez book (Digital Image Processing using Matlab), requested you to refer the book for detail explanation.

function [T,SM]=otsuthresh(h);
h=h/sum(h);
h=h(:);
i=(1:numel(h))';
P1=cumsum(h);
m=cumsum(i.*h);
mG=m(end);
sigSquared=((mG*P1-m).^2)./(P1.*(1-P1)+eps);
maxSigsq=max(sigSquared);
T=mean(find(sigSquared==maxSigsq));
T=(T-1)/(numel(h)-1);
SM=maxSigsq/(sum(((i-mG).^2).*h)+eps);
end