Length Measurement on Pictures
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Hi,
i have images with fibres on them and I need a simple way to measure the length of those fibres.
My idea is, that I can add a starting point and several points in between the starting point and a endpoint, maybe just by left mouse click, and finish the process by right click. Since not all the fibres at straight but also curved, I need more than a starting and end point.
What would be the easiest way to write a program for that? Using GUI? Any ideas ? :)
Thanks for your help
6 Comments
Ryan
on 8 Jun 2012
I'll play with it in my free time at work tomorrow, see if I can figure something out quickly to segment it.
Accepted Answer
Image Analyst
on 8 Jun 2012
That looks tough. I can foresee A LOT of false positives and false negatives. You might have to combine a multitude of approaches, like thresholding, edge detection, Hough() or Houghlines(), morphological filters, etc. Or do some research on ridge and valley detection: http://en.wikipedia.org/wiki/Ridge_detection
6 Comments
Image Analyst
on 8 Jun 2012
Ryan, I don't believe Canny uses ridge detection: http://en.wikipedia.org/wiki/Canny_edge_detector
Ryan
on 8 Jun 2012
I was under the impression that the nonmaximal supression step in Canny edge detection was needed as a result of the ridges that result in the gradient calculation.
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