Perform operations on non-zero locations of the matrix

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lech king
lech king 2020-10-8
评论： Ameer Hamza 2020-10-8
pic1=rgb2gray(pic);
pic2 = imnoise(pic1,'salt & pepper',0.05);
%%%%%%%Hard Thresholding%%%%%%
Container=pic2>80;
Container=uint8(Container);
pic3=pic2.*Container;
Hi
this is my Hard Thresholding in pic3
now i want Soft Thresholding by subtracting the places have non-zero values in pic3 from 80 without using a loop
Thanks for your guidance

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Ameer Hamza
Ameer Hamza 2020-10-8
mask = pic3 > 0; % mask for non-zero values of pic3
pic3(mask) = pic3(mask) - 80;

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R2019b

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