Posted by
Ben Fitzgibbon on
Nov 20, 2006; 12:50am
URL: http://imagej.273.s1.nabble.com/measurements-tp3700984p3700986.html
Thankyou all
The Measure Roi plug in is the one I was looking for. I am digitizing
photos of coral colonies to measure growth as increase in area and x/y
increase.
Thankyou very much for the guidance
Ben
-----Original Message-----
From: ImageJ Interest Group [mailto:
[hidden email]] On Behalf Of
audrey karperien
Sent: Saturday, 18 November 2006 10:28 AM
To:
[hidden email]
Subject: Re: measurements
FracLac calculates the maximum span across the convex hull if that would
work.
audrey
----- Original Message ----
From: John Cahill <
[hidden email]>
To:
[hidden email]
Sent: Friday, November 17, 2006 1:44:03 PM
Subject: Re: measurements
Ben,
You may be looking for the feret dimension of the object, see Gabriel
Landini's excellent software for ImageJ at
http://www.dentistry.bham.ac.uk/landinig/software/software.htmlCan you describe the measurement you expect to get if an isosceles
triangle is drawn (base of a, height of b) then rotated and moved
arbitrarily in the image.
Do you expect the measurements to be invariant of the rotation angle
and position?
cheers,
John Cahill
Carlisle MA
On 11/16/06, Ben Fitzgibbon <
[hidden email]> wrote:
> Hello
>
>
>
> I am attempting to measure the maximum linear length of the x and y
axis
> of free-hand drawn polygons of various shapes using Image J. The only
> measurement function that I can determine is suitable for this type on
> analysis is the 'Fit Ellipse' function. My colleague used to own a mac
> computer and suggests that it was once possible to get a maximum x and
> maximum y value using NIH for Mac. Is the 'Fit Ellipse' function the
> best way of doing this?
>
>
>
> Any help would be greatly appreciated
>
>
>
>
>
> Cheers
>
>
>
> Ben
>
>
>
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>
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