How can i detect Squire and Circle objects in image?

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odai kiwan
odai kiwan 2018-2-26
评论： odai kiwan 2018-2-26
My project is about detecting color and shapes, And i have two shapes (Circle and Squire).How can i detect the shape in this case. And after that extract the color of the shape? Like this image for example

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KSSV
KSSV 2018-2-26
I = imread('circle.jpg') ;
I1 = im2bw(I) ;
[y,x] = find(I1~=1) ;
c = mean([x y]) ;
R = max(sqrt((c(1)-x).^2+(c(2)-y).^2)) ;
th = linspace(0,2*pi) ;
xc = c(1)+R*cos(th) ;
yc = c(2)+R*sin(th) ;
imshow(I) ;
hold on
plot(xc,yc,'r')

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