Best way to find vertical contours in a colored image

Question

I want to detect only the vertical contours on an image like this:

The standard method with canny detector gives back a poor result. (i prefer openCV API, but any idea would be helpful)

you can try sobel or laplace edge detector then threshold it and pass to hough — Zaw Lin, Oct 17 '13 at 06:36

score 0 · Answer 1 · answered Oct 16 '13 at 21:20

0

You can use hough line detection to detect vertical lines

answered Oct 16 '13 at 21:20

user973743

The Hough works on detected edges, not on the image directly. http://docs.opencv.org/doc/tutorials/imgproc/imgtrans/hough_lines/hough_lines.html – András Kovács Oct 16 '13 at 22:19

score 0 · Answer 2 · answered Oct 18 '13 at 07:27

0

You should apply a horizontal filtering (e.g. Sobel – cvSobel() ), which will detect only the vertical edges.

answered Oct 18 '13 at 07:27

Raluca

2 Answers2