What are the advantages/disadvantages to using the ball compared to the disk structuring element?

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Jason Motl on 16 Jan 2013

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Accepted Answer: Amith Kamath

I'm new to MATLAB and am trying to understand the strel operation.

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Answer 1

Amith Kamath on 16 Jan 2013

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https://ch.mathworks.com/matlabcentral/answers/59021-what-are-the-advantages-disadvantages-to-using-the-ball-compared-to-the-disk-structuring-element#answer_71424

http://blogs.mathworks.com/steve/2006/10/23/nonflat-grayscale-dilation-and-erosion/ has some details about the non-flat structuring elements. In one line, flat strels have a common weight for each pixel in it, and non-flat strels are weighted. The 'ball' strel in particular has highest weight at the center, and tapers down uniformly towards the edges. As to which one is better, I suppose it is application specific.