How to morphologically open a binary image ?

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Gn Gnk
Gn Gnk on 21 Nov 2020
Commented: Gn Gnk on 24 Nov 2020
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 ?

Answers (2)

Image Analyst
Image Analyst on 21 Nov 2020
This works just fine:
grayImage = imread('moon.tif');
subplot(2, 2, 1);
title('Original Gray Scale Image', 'FontSize', 15);
original_binary = imbinarize(grayImage);
subplot(2, 2, 2);
title('Binarized Image', 'FontSize', 15);
se=strel('disk',3, 0);
subplot(2, 2, 3:4);
title('Opened Image', 'FontSize', 15);
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).
Gn Gnk
Gn Gnk on 24 Nov 2020
Got it ! Do you know any other function that i can use to do what i want ?For example check this binary image before and after using imopen() . This is what i want to achieve in the end.

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asd asd
asd asd on 21 Nov 2020
Good luck with ΨΕΕ file!


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