how to smooth / refine edges ??
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hello all, i have a final image as an output.. as a result of processing image edges got irregular... how can it be possible for me to smooth/refine just the edges not the complete image... actually i was trying to apply gaussian filter on it it smooths the entire image... P.S image type is RGB .. waiting for replies...
Thanks,
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Sean de Wolski
2013년 6월 6일
편집: Sean de Wolski
2013년 6월 6일
Similar to what Paul is suggesting:
%Standard IPT Image
I = imread('cameraman.tif');
%Its edges
E = edge(I,'canny');
%Dilate the edges
Ed = imdilate(E,strel('disk',2));
%Filtered image
Ifilt = imfilter(I,fspecial('gaussian'));
%Use Ed as logical index into I to and replace with Ifilt
I(Ed) = Ifilt(Ed);
For an RGB image you may first have to repmat() Ed so that it exists in all three dimensions
Ed3 = repmat(Ed,[1 1 3]);
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Sean de Wolski
2013년 6월 7일
If you change the image to be three dimensional, you'll need to either extract a color plane from it or use rgb2gray
For example
Igray = rgb2gray(I);
or
Ired_channel = I(:,:,1);
추가 답변 (2개)
Paul Kelly
2013년 6월 6일
I've never tried this but I would probably approach it in the following way:
convert the image to grayscale RGB = imread(imageFile); I = rgb2gray(RGB);
binarise it (this will be quite tricky) or find another way to isolate the edge you are interested in. For example:
level = graythresh(I);
BW = im2bw(I,level);
find the edges of the binarised image:
edgeImage = edge(BW,'canny');
Then use morphological functions to broaden the edges to a reasonable size
Finally use the edge image as a mask for the smoothing operation
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Pallawi Pallawi
2017년 9월 21일
Image 1 with the gray background was my input image and I removed the gray background with a white one! Now I need to refine the edges ,making it look smoother . I have tried ,gaussian and above suggestions but it does not works.can someone please help me!LOOKING FOR AN URGENT HELP.
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