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On Friday 07 March 2008 10:56:20 Olga Fishkis wrote:
> Hello,
> I would like to measure convexity of particles ( Convex Hull Perimeter
> divided by particle perimeter).
> Although the value of convexity has to vary between 0 and 1 (convex hull
> perimeter is no longer than the particle perimeter), the convexity values
> for some particles calculated by "Calculate convexity and solidarity" are
> higher than one. Does anybody have an idea how to overcome this problem?
You can try the Particle8_Plus plugin I mentioned a couple of days ago.
That computes the perimeter using Freeman's algorithm for both the particle
perimeter and the convex hull. It also computes the convexity, convex area,
solidity and many other parameters.
Regards,
G.
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