How can I vectorize the following code?

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Ba Ba Black Sheep! 2017-7-28

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/350594-how-can-i-vectorize-the-following-code

评论： Image Analyst 2017-7-29

采纳的回答： Image Analyst

在 MATLAB Online 中打开

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 2017-7-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/350594-how-can-i-vectorize-the-following-code#answer_275860

在 MATLAB Online 中打开

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! 2017-7-29

I was talking about retaining some_function().

Image Analyst 2017-7-29

在 MATLAB Online 中打开

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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