How can i do the threshold of an image ?

Question

ting 2013-11-27

关闭： MATLAB Answer Bot 2021-8-20

I think i need to do threshold-ing. If i set T=10, If I<10, i want to set them to be zero and only keep those intensities >=10

 Results==idct2(X_dq);
 T=10;
 Ouput=Results>=10;

But i got this result, However, i want to keep my second row instead of all ones. I don't want a binary image.

What can i change ?? Thank you

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Answer 1

Image Analyst 2013-11-27

T = 10;
binaryImage = Results > T;
% Get new X with zeros where it's less than 10:
X(~binaryImage) = 0;

ting 2013-11-28

I want to threshold those I<10 but keep this row how can i do that? Thank you

Image Analyst 2013-11-28

编辑：Image Analyst 2013-11-28

What is the name of that array, is it I? If so, then do:

I(I<10)=0;