Jul 15, 2011 01:02:09 PM,
[hidden email] wrote:
On 7/15/11 6:04 PM, Scott Slavin wrote:
> Is anyone aware of an ImageJ macro or plug-in that is capable of
> automatically detecting diagonal lines, and measuring their angle
> relative to either the horizontal or vertical axis?
>
I did something similar by taking the Fourier transform of images of
combed DNA, and then detecting the part that was generated by the lines
(which will be perpendicular to those lines). I was able to
automatically detect this component, use the particle analyzer to find
the best fit ellipse, and then use the angle from the results table
(maybe +/-90 degrees depending on how you wish to define your angle).
Your imager probably will produce artifacts at 0 and 90 degrees, but
that is easy to remove.
Hope this helps.
--aryeh
--
Aryeh Weiss
School of Engineering
Bar Ilan University
Ramat Gan 52900 Israel
Ph: 972-3-5317638
FAX: 972-3-7384051
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