How can I vectorize the following code?

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Ba Ba Black Sheep!
Ba Ba Black Sheep! 2017-7-28
评论： Image Analyst 2017-7-29
main.m
I = imread('bear.png');
J = rgb2gray(imread('marked_bear.png'));
mask = I-J;
for r=1:size(I,1)
for c=1:size(I,2)
if(mask(r,c))
I = some_function(I, r, c);
end
end
end
imshow(I);
some_function.m
function I = some_function(I, r, c)
% some processing on image 'I'
I(r,c) = 255;
bear.png
marked_bear.png

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采纳的回答

Image Analyst
Image Analyst 2017-7-28
Like this:
I = imread('bear.png');
J = rgb2gray(imread('marked_bear.png'));
mask = I-J; % Weird, but okay...whatever.
I(mask~=0)=255;
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Ba Ba Black Sheep!
Ba Ba Black Sheep! 2017-7-29
I was talking about retaining some_function().
Image Analyst
Image Analyst 2017-7-29
OK, then...
function I = some_function(I, J)
mask = I - J;
I(mask ~= 0) = 255;
There. It's vectorized, still has a function, and that function is called "some_function" (instead of MaskI as I had called it), just like you asked for.

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