How to delete one of the two outlines of an image

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Jórdan Venâncio Leite
评论： Rena Berman 2020-10-12
I have a binary image with two outlines (attachment). One larger and one smaller. I used the bwconncomp and regionprops function to identify such outlines and their respective areas. I would like to get another image, similar to the image i attached, but without the smaller outline. The regionprops function returns a struct with a field and two values where it is possible to identify the area of the smallest contour in which I want to remove it from my initial image. Do you have any idea how to solve this?
Thanks in advance
Contour = bwconncomp(image, 8);
area = regionprops(Contour, 'Area');

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Ameer Hamza
Ameer Hamza 2020-4-5
Following code will select the smallest region and remove it from the image
load('Image.mat');
image = preenc;
Contour = bwconncomp(image, 8);
area = regionprops(Contour, 'Area');
[~, idx] = min([area.Area]);
mask = Contour.PixelIdxList{idx};
image(mask) = 0;
imshow(image);
  2 个评论
Ameer Hamza
Ameer Hamza 2020-4-5
preenc is the name of the variable in your Image.mat file. Just set it to whatever is the name of your image variable.
Ameer Hamza
Ameer Hamza 2020-4-5
Like this
load('Image.mat');
image = preenc;
Contour = bwconncomp(image, 8);
area = regionprops(Contour, 'Area');
idx = find([area.Area] < 50000);
for i=1:numel(idx)
mask = Contour.PixelIdxList{idx(i)};
image(mask) = 0;
imshow(image);
end

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