How can i do the threshold of an image ?

• The above image of size 8*8 is my original image

• The second one reconstructs from idct, i.e (idct2 is used here)

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

Answer 1

[Image Analyst]

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

[ting]

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

[Image Analyst]

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

I(I<10)=0;