Re: Ever decreasing circles

Posted by John Brear on Dec 12, 2016; 7:56pm
URL: http://imagej.273.s1.nabble.com/Ever-decreasing-circles-tp5017755p5017767.html

Dear Dimeter,

My original question, in my first email, was:
"Calculating the circularities of our observed precipitates shows that we would obtain much better discrimination by selecting on circularity values greater than 1.  At present ImageJ does not allow this.  Is there a simple way of overriding this limit?"
I essentially reiterated it in my last email:
"All I wish to do is select my set for analysis in a manner that allows choice of circularity values >1."

I provided some background into what I was doing and why, as my field of application is very different from that of most IJ users.  This was a mistake as it has distracted everyone into metaphysics.

Happy to be metaphysical, but more happy to find a practical solution to my issue.

Best wishes

John

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Dimiter Prodanov (imec)
Sent: 12 December 2016 16:19
To: [hidden email]
Subject: Re: Ever decreasing circles

Dear John,

A pixel is an integral measurement. You can think of them as space-time convolutions with a linear response transfer function.
The remark of Gabriel points out the crucial impact of the discrete metric in the low-resolution cut-off.  
Such measurements are severely biased so it is not possible to interpret them as continuous shapes.

Best regards,

Dimiter Prodanov

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