Re: edge detection

Posted by Gabriel Landini on Mar 14, 2007; 8:34pm
URL: http://imagej.273.s1.nabble.com/edge-detection-tp3700010p3700015.html

On Wednesday 14 March 2007 17:56:28 Michael Schmid wrote:
> Below is an plugin that may get the junctions - it is not
> necessarily perfect, it may depend on the skeletonize code
> whether it works correctly.
>
> There is a parameter to play with in isJunction:
>          if (maxAdjacentPixelsSet > 3)
> Maybe the threshold should be 2 or 4 for some types of
> skeletonize codes.

The plugin BinaryConnectivity :

http://www.dentistry.bham.ac.uk/landinig/software/software.html

creates an image where binary pixels are labelled according to the number of
connected pixels (+1) to each foreground pixel (8 neighbours). E.g.
background = 0, single pixel = 1, end of a line = 2, double or middle of a
line points= 3, triple points = 4, etc. Brightness/Contrast must be adjusted
to see the result.

I hope it helps.

G.