Comments on: Detecting Circular Objects in Images

By: Nino

Nino — Tue, 11 Sep 2012 17:30:26 +0000

If you use this method along with RGB thresholding you might get better results, don’t you?

By: Spandan Tiwari

Spandan Tiwari — Thu, 06 Sep 2012 13:37:02 +0000

Sven,

That’s a nice suggestion for the cartoon. I especially like the randi(360) touch!

By: Steve Eddins

Steve Eddins — Wed, 05 Sep 2012 17:49:25 +0000

The methods used are from the family of circular Hough transform algorithms.

By: michael

michael — Wed, 05 Sep 2012 17:46:00 +0000

what method circels detected i am familier with hough circle transform is it this method?
or it find object use bwlabel and match eccentrity 0 for circle

By: Sven

Sven — Tue, 04 Sep 2012 22:28:09 +0000

Nice post Spandan – I’ve got some old code that used a FEX houghcircle submission that looks like it could be cleaned up and perhaps made more efficient with these 2012a additions.

There’s one thing missing from your cartoon though!

t = text(centers(:,1),centers(:,2),’m',’Color’,[1 1 1]*.75,’FontWeight’,'bold’,'Fontsize’,14,’HorizontalAlignment’,'center’,'VerticalAlignment’,'middle’);
for i=1:length(t), set(t(i),’Rotation’,randi(360)), end