Hi everyone, I have a problem that I do not understand as below: I write a program to detect the circle, my goal is detect it in binary (only black and white) image. I read some example and I can use Houghcircle to detect the circle but only on gray image, in binay image I can not. Can you help to explain and solve my problem. Thank you!
You can try to smooth your binary image a bit with cv::GaussianBlur or cv::blur before calling HoughCircles.
hough works on gradients, and a binary image does not have those.
please have a look at the tutorial
you either need a different image format, or a different method (findContours -> ellipse approx.)
my problem is I gonna detect a circle real time, but in the gray image, the speed quite slow, (use houghcircles)
Asked: 2016-09-27 07:22:26 -0600
Seen: 329 times
Last updated: Sep 27 '16
