Questions about equations of Shape Descriptors
Posted by
Ruszkai Ákos on
Feb 25, 2010; 9:10pm
URL: http://imagej.273.s1.nabble.com/Questions-about-equations-of-Shape-Descriptors-tp3688338.html
Hello,
I think I'm asking trivial questions again, but I better be sure about this.
http://rsbweb.nih.gov/ij/docs/menus/analyze.html says:
*Round* (roundness): 4*area/(π*sqr(major axis)), or the inverse of the
aspect ratio.
So... does area in this equation mean "area of best fit ellipse" ? I suppose
it does, as we're talking about "major axis" in the denominator.
Also, does sqr mean pow(major axis, 2) aka (major axis)^2 ?
In that case, how'd you write square root?
Regards,
Ákos