how to copy circle for a new image using imfindcircle?

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Shoval Matzner
Shoval Matzner 2020-2-23
回答： Devineni Aslesha 2020-3-2
i have this code and i need to copy the circle part of the image to a new image and for the life of me i cant figure out a way to do it.. thanks in advance!!
A = imread('Speed.jpg');
% Resize the image
rowSZ = size(A, 1);
colSZ = size(A, 2);
rows = 250*(colSZ/rowSZ);
J = imresize(A, [rows 250]);
% Show image
imshow(J)
% Set circle radius to find
Rmin = 50;
Rmax = 100;
% Find circles within the raidus
[centers, radii, metric] = imfindcircles(J,[Rmin Rmax]);
% Show circle on the image
viscircles(centers, radii,'EdgeColor','b');

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回答（1 个）

Devineni Aslesha
Devineni Aslesha 2020-3-2
Use the code below to copy circle for a new image using 'imfindcircle'.
theta=0:1:360;
r=round(centers(1,1) + radii*sin(theta));
c=round(centers(1,2) + radii*cos(theta));
for j=1:length(r)
B(c(j),r(j),:)=[0 0 255];
end
figure(2)
imshow(B)
For more information, refer the following link.
https://www.mathworks.com/matlabcentral/answers/260958-how-to-save-image-of-the-result-imfindcircle

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