How to get the first derivative of pixels along of line?

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BA 2022-8-11

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https://ww2.mathworks.cn/matlabcentral/answers/1778080-how-to-get-the-first-derivative-of-pixels-along-of-line

评论： BA 2022-8-12

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#Here's my code

#it works for one frame when I did 'plot(diff(test))' but I need a way to implement it to the whole images

imshow(M(:,:,1))
[x ,y]= ginput(2);
dif = zeros(size(M,3),1);
for i = 1:size(M,3)
    I = M(:,:,i);
    
    n = ceil(norm([diff(x), diff(y)]));
    
    test = improfile(I,linspace(x(1), x(2),n), linspace(y(1), y(2),n));
end
dif(i) = diff(test);

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Rik 2022-8-12

Why did you flag your question as unclear? The only person who can clarify your question is you. Why don't you do so?

And why did you change your user name?

BA 2022-8-12

@RikI'd like to do some attempts and then reframe the question.

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回答（1 个）

KSSV 2022-8-12

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REad about gradient

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Image Processing and Computer Vision Image Processing Toolbox Image Filtering and Enhancement ROI-Based Processing

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