how can i filter a RGB without using imfilter,conv,conv2 or similar?

Question

Alprcnkt 2016-4-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/277024-how-can-i-filter-a-rgb-without-using-imfilter-conv-conv2-or-similar

评论： Image Analyst 2020-4-18

hi guys,

i have to create a function which has 2 inputs (one for image ,one for kernel which is [5 5]) and for the pixels from outside the original image must be [0,0,0]

ps : no conv, conv2, imfilter or similar

TO be clear : the code must be something in it but i dont know how i do that

function [result] = evc_filter(I, kernel)
    result = I;
end

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Leo Meditz 2020-4-18

Have you figured it out? I have the same problem

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Answer 1

Walter Roberson 2016-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/277024-how-can-i-filter-a-rgb-without-using-imfilter-conv-conv2-or-similar#answer_216336

http://www.mathworks.com/help/matlab/ref/conv.html#buc311j-4

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Answer 2

Image Analyst 2020-4-18

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https://ww2.mathworks.cn/matlabcentral/answers/277024-how-can-i-filter-a-rgb-without-using-imfilter-conv-conv2-or-similar#answer_426778

convolution_manual.m

See my attached manual convolution script.

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Leo Meditz 2020-4-18

Thanks for the fast reply. The skript is pretty large and I'm a beginner. how do i find the thing i'm searching for?

Image Analyst 2020-4-18

在 MATLAB Online 中打开

The beginning stuff is just asking the user for the image and the window size. The main part is where it says:

%=================================================================================================
% HERE IS THE MAIN COMPUTATION ENGINE OF THE WHOLE PROCESS:

That's where the 4-deep nested for loop is.

I think it's very well commented. If you disagree, tell me what parts need more explanation.

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