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How to blur some part of image without affecting rest of the part?

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Narendra Kumar
Narendra Kumar 2022-7-5
回答： Chunru 2022-7-5
Suppose I have an image (Cameraman.tif) and I want to select some part of the input image then I Want to apply imfilter() operation only for the selected part not for the rest part. Lastly, when i will showing the blurred image then It has the same size which is equal to input image.

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Chunru
Chunru 2022-7-5
Ran in:
I = imread("peppers.png");
imshow(I)
LEN = 31; THETA = 11;
PSF = fspecial('motion', LEN, THETA);
% Blur part of image
I(100:300, 100:300, :) = imfilter(I(100:300, 100:300, :), PSF);
figure
imshow(I)

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