How to divide a binary image circularly into "n" non overlapping equal size sectors around its center of gravity to count foreground pixels in each sector?

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Burhan
Burhan 2015-12-29
编辑： Matt J 2015-12-29
How to divide a binary image circularly into "n" non overlapping equal size sectors around its center of gravity to count foreground pixels in each sector?

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Matt J
Matt J 2015-12-29
编辑：Matt J 2015-12-29
Use NDGRID and FIND,
[M,N]=size(binaryImage);
[X,Y]=ndgrid((1:M)-centerX,(1:N)-centerY)
[i,j]=find(binaryImage);
Then use cart2pol to convert to polar coordinates,
theta = cart2pol(X(i),Y(j));
and finally apply histcounts() to theta.

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