How to get the centerline of a binary region

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Sam Ade
Sam Ade 2021년 10월 17일
댓글: Image Analyst 2021년 10월 18일
I have a binarize image below, I am trying to find the centerline of the image such as that in red on the binarize image. I did use the bskel function but get branches. I am hoping to elimated (prone or remove) all branches.
Any suggestions will be most appreciated. Any other way to do this another than using bskel will be great too.

채택된 답변

DGM 2021년 10월 17일
There's this.
A = imread('arc.png')>128;
B = bwmorph(A,'skel',inf); % skeletonize
B = imfill(B,'holes'); % get rid of any tiny closed paths
B = bwmorph(B,'skel',inf); % finish skeletonizing
% remove endpoints until only two are left
while true
e = bwmorph(B,'endpoints');
if nnz(e)>2
B = B & ~e;

추가 답변(1개)

KSSV 2021년 10월 17일
You can get the indices of white pixels using find and to the data you can try fitting a line or quadratic equation using polyfit.
[y,x] = find(I) ;
p = polyfit(x,y,2) ;
xi = linspace(min(x),max(x)) ;
yi = polyval(p,xi) ;
hold on
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Image Analyst
Image Analyst 2021년 10월 18일
This is exactly how I'd do it.

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