OpenCV grooving detection

Question

I have pictures of a surface with many grooves. In most cases the edges of the grooving f

Answer 1

What immediately comes to mind would be a Hough Transform. This is a voting scheme in line space, which takes each possible line and gives you a score for it. In the code I linked to above, you could simply set a threshold that approximates ~10% of screwed up grooves/lines.