How can I create structuring element arbitrarily in marker control watershed?
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% here a sample code and I wolud like to set structuring element arbitrarily
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se = strel('disk',10);
Io = imopen(I, se);
Ie = imerode(I, se);
Iobr = imreconstruct(Ie, I);
Ioc = imclose(Io, se);
Iobrd = imdilate(Iobr, se);
Iobrcbr = imreconstruct(imcomplement(Iobrd), imcomplement(Iobr));
Iobrcbr = imcomplement(Iobrcbr);
fgm = imregionalmax(Iobrcbr);
I2 = I;
I2(fgm) = 255;
%clean the edges of the marker blobs
se2 = strel(ones(5,5));
fgm2 = imclose(fgm, se2);
fgm3 = imerode(fgm2, se2);
fgm4 = bwareaopen(fgm3,10); %shink them a bit e.g 20
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%please help me ,how can i set arbitrarily
2 个评论
Walter Roberson
2014-1-6
What is the difference between this question and your previous http://www.mathworks.co.uk/matlabcentral/answers/111276-how-many-ways-to-define-shape-and-size-of-structuring-element-depend-on-images-in-watershed-segmenta ?
In that previous one I already pointed out that strel() can take arbitrary neighbourhoods for the shape. Look at the documentation: it is the second sample syntax http://www.mathworks.com/help/images/ref/strel.html
kyawt kyawt
2014-1-6
采纳的回答
Walter Roberson
2014-1-6
0 个投票
The example does not show [100;100;101] and instead shows [1 0 0; 1 0 0; 1 0 1] . The example is arbitrary and might not be useful in any real situation (but might be.)
If you want to understand what a particular structuring element will do for you, you need to study morphology; see http://en.wikipedia.org/wiki/Dilation_%28morphology%29
I am not able to explain this at the moment as it is too late at night for me to be able to understand the formulas on first reading.
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