Question

I’m trying to detect line segments in an image.

From what I gather, the Hough algorithm detects lines but not segments.

Does anyone know of how I would go about this, or any libraries suitable for this?

Im my case, I’m trying to detect star trails (which for these purposes are all straight) from a photograph so I can reduce them back to points.

If it’s important, I’m trying to implement this in C#

Any ideas?

Answer 1

For unsmearing motion blur, you should look at deconvolution. The Hough transform might be helpful in finding the original motion vector (I suspect it would work fine for a bunch of parallel line segments), but deconvolution is what you’d use to get the original stars back out of it, and these guys use a different method for estimating the original motion vector:

• Removing Motion Blur from Astrophotographic Images