Find intersecting points in a image
显示 更早的评论
How can I extract the boundary points of the first image. How can I plot it? How can I fiit a polynomical on the image boundary?
In the bottom image, after fitting a polynomial on the image boundary how an I find the intersecting points of the line and fitted polynomial ?
回答（1 个）
KSSV
2021-2-2
I = imread('myimage') ; % give your image
[y,x] = find(I==0) ; % white pixel value;
idx = boundary(x,y) ;
bnd = [x(idx) y(idx)] ; % boundary points data
Now you have boundary data points in hand. Make your line for which you want to get the intersection points with boundary. And then use https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections
Also there are other ways to get the intersection points without using the above. Read about knnsearch.
类别
在 帮助中心 和 File Exchange 中查找有关 Lighting, Transparency, and Shading 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
