Re: particle analysis-Feret diameter

Posted by Gabriel Landini on Nov 28, 2005; 8:03pm
URL: http://imagej.273.s1.nabble.com/particle-analysis-Feret-diameter-tp3704371p3704390.html

On Mon, 28 Nov 2005, Krishnan Subramaniam wrote:
>    If I am right then we just need the diameter of the smallest circle that
> would fully circumscribe the ROI - the minimal circle where the ROI is fully
> contained within the circle (We will have at least two points of the ROI
> that have to be on the circumference of the circle). I think the "diam of
> the min circle" method should work - at least I can't see why it would not.

No, they are different things. Imagine an equilateral triangle. The
maximum feret diameter would be the length of one of its sides (i.e. the
longest distance between any 2 points in the perimeter), however the
diameter of the minimal bounding circle has to be larger than the feret
since it has to contain the 3 vertices.

Cheers,

Gabriel