Ask Your Question
0

What filter is recommended before applying HoughCircles

asked 2013-04-23 15:17:34 -0600

hayden gravatar image

Hello, as I applied HoughCircles and failed to detect the circles, does any one recommend to apply any filter before HoughCircles? Thanks.

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted
1

answered 2013-04-24 09:27:12 -0600

zerog80 gravatar image

updated 2013-04-24 09:28:31 -0600

The usual one is the Gaussian Blur, because a low-pass filter can reduce the detection of false circles. However, take into account that the Hough Circles function incorporates a Canny edge detector that is applied before the actual detection, so maybe you have to better tweak its threshold parameters.

The full example can be found here.

edit flag offensive delete link more

Question Tools

Stats

Asked: 2013-04-23 15:17:34 -0600

Seen: 1,157 times

Last updated: Apr 24 '13