How to morphologically open a binary image ?
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Hello , i am trying to morphologically open(to decrease the retrieved area) a binary image . However i am getting a black image (all pixels are 0) .What is wrong ?
se=strel('disk',3);
Im_open=imopen(original_binary,se);
figure;
imshow(Im_open);
回答(2 个)
Image Analyst
2020-11-21
This works just fine:
grayImage = imread('moon.tif');
subplot(2, 2, 1);
imshow(grayImage);
title('Original Gray Scale Image', 'FontSize', 15);
original_binary = imbinarize(grayImage);
subplot(2, 2, 2);
imshow(original_binary);
title('Binarized Image', 'FontSize', 15);
se=strel('disk',3, 0);
Im_open=imopen(original_binary,se);
subplot(2, 2, 3:4);
imshow(Im_open);
title('Opened Image', 'FontSize', 15);
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/422273/image.png)
If it doesn't for you then it's possible all your white blobs in your original image are less than 7 pixels in diameter (3 in radius). Or else your image is so big that the small things just get subsampled away for display (zoom in, in that case to see them).
6 个评论
Image Analyst
2020-11-23
OK, but then what that will do is to remove any blobs smaller than 3 pixels in radius, or 7 pixels in diameter.
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