How do we know what are the superpixels connected to each other ?

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编辑： Casio Uploader 2018-6-9
I am using SLIC superpixel algorithm. How to create adjacency matrix for superpixels? How do we know what are the superpixels connected to each other?
Thanks in advance

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回答（2 个）

Image Analyst
Image Analyst 2017-4-23
You can use GLCM - the Gray Level Cooccurrence Matrix, done by graycomatrix(). It tells you which gray levels are next to which other gray levels. I attached a demo.
  2 个评论
Ad
Ad 2017-4-23
I have used GLCM. I got result like this.
graystats.Correlation,0.056197194015968
graystats.Energy,0.985076430158353
graystats.Homogeneity,0.245757011433993;
graystats.Contrast,0.992415460185401
Q. How do I know the connected superpixels?
GLCMS2= graycomatrix(rgbtogray);% it is accepting 2D images only
graystats = graycoprops(GLCMS2,{'all'});
Image Analyst
Image Analyst 2017-4-23
You don't need the stats. Just look at the matrix and see what locations have non-zero pixel pair counts. It says what label is next to what other label.
2 is next to 3, 4, 5, and 6
3 is next to 2, 4, 5, 6, and 7
4 is next to 2, 3, 5, and 6
and so on.

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Casio Uploader
Casio Uploader 2018-6-9
编辑：Casio Uploader 2018-6-9
glcms=graycomatrix(L); % 'L' is Labled Image output of SLIC superpixel algorithm
kkkk=glcms(:,SupNum); %if you want to find neibours of 1,then input SupNum=1 in both places
[rrrr,~]=find(kkkk>0); aa=find(rrrr==SupNum);
rrrr(aa)=[];
%%rrrr is output matrix which contains the neighbours of 1(or your desired one)
N.B.:It will give you just right directions neighbour information,to get all direction use 'Offset' optiom for graycomatrix() function.See: https://in.mathworks.com/help/images/ref/graycomatrix.html

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