Yeah especially the Hough Transform isn't quite clear in my mind yet, I assume the best way to really understand it would be to implement it myself. I had a pr

Yeah especially the Hough Transform isn't quite clear in my mind yet, I assume the best way to really understand it would be to implement it myself. I had a process with feature selectaion actually, even if that isn't quite clear from the text. First I had for a long time just the amount of lines and the average length which didn't really work, I had to think a lot to come up with other features and then I got a bit lucky (but mostly I was looking at the images with the lines in them to try to figure out the differences myself) with the average angle. And yeah, with "radius" I didn't mean the concrete spacial radius (in n dimensions) but just like you say the k nearest neighbours.