Re: particle analysis-Feret diameter

There are some utilities at
http://www.optinav.com/ImageJplugins/Measure-Roi.htm

Bob

Robert P. Dougherty, Ph.D.
President, OptiNav, Inc.
Phone (425) 467-1118
Fax (425) 467-1119
www.optinav.com
 
> -----Original Message-----
> From: ImageJ Interest Group [mailto:IMAGEJ@xxxxxxxxxxxx] On Behalf Of K.
> Kachrimanis
> Sent: Saturday, November 26, 2005 1:45 PM
> To: IMAGEJ@xxxxxxxxxxxx
> Subject: particle analysis-Feret diameter
> 
> Dear all,
> 
> I have a question or rather a feature request related to the particle
> analysis, which so far has limited functionality copared to commercial
> software packages in regard to particle size and shape analysis. I have
> noticed that there is a Feret diameter included in the module, but it is
> not clear at which orientation is this Feret measured. Since Feret
> diameters depend on particle orientation, a Feret at a single orientation
> is virtually useless, particularly when one has to deal with elongated
> particles. Would it be possible to include more Ferets, at different
> angles, and also add an automatic selection of maximum and minimum Ferets?
> This would enable the calculation of the aspect ratio and other relevant
> shape descriptors.
> 
> Regards,
> 
> K.Kachrimanis.