Posted by
Swayne, Theresa C. on
May 03, 2017; 3:13pm
URL: http://imagej.273.s1.nabble.com/Information-about-Set-Measurements-tp5018655p5018658.html
Dear Adrián,
The code shows in detail how ImageJ calculates the Feret values.
But it may not be so easy to read.
In short, if I’m reading correctly, it finds a polygon approximating the convex hull of the particle, then generates diameters of the polygon at a series of angles, in 0.5 degree increments. The shortest of all these diameters is stored as the minFeret.
You can search the forum (forum.imagej.net<
http://forum.imagej.net>) and the archives of this list for more discussion that is more detailed than the user manual, but less code-y than the source.
Hope this helps,
Theresa
On May 3, 2017, at 10:55 AM, Adrián Villalba <
[hidden email]<mailto:
[hidden email]>> wrote:
Dear Theresa,
Thank you for the code library! Do you know if in addition i can find the
mathematical explanation?
Thanks in advance!
2017-05-03 16:51 GMT+02:00 Swayne, Theresa C. <
[hidden email]<mailto:
[hidden email]>>:
Dear Adrián,
The code for the calculation is in the ROI class:
https://imagej.nih.gov/ij/developer/source/ij/gui/Roi.java.htmlThis is the link to the browsable source code for ImageJ:
https://imagej.nih.gov/ij/developer/source/index.htmlHope this helps,
Theresa
On May 3, 2017, at 9:50 AM, Adrián Villalba <
[hidden email]<mailto:ad
[hidden email]>> wrote:
Dear all,
I want to know where ca i find more information about some parameters that
i can measure in imageJ such as FeretX, FeretY, all the shape descriptors
information (AR, round, circularity...) I found a short description at the
user manual of imageJ but i want to know if there is some place where it is
high described and explained (for example, how does imageJ measure
FerretMin?) .
Thank you in advance
--
- Adrián Villalba Felipe.
https://es.linkedin.com/in/adrianvillalba--
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Theresa Swayne, Ph.D.
Manager
Confocal and Specialized Microscopy Shared Resource<
http://hiccc.
columbia.edu/research/sharedresources/confocal>
Herbert Irving Comprehensive Cancer Center
Columbia University Medical Center
1130 St. Nicholas Ave., Room 222A
New York, NY 10032
Phone: 212-851-4613
[hidden email]<mailto:
[hidden email]>
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- Adrián Villalba Felipe.
https://es.linkedin.com/in/adrianvillalba--
ImageJ mailing list:
http://imagej.nih.gov/ij/list.html------------------------------------
Theresa Swayne, Ph.D.
Manager
Confocal and Specialized Microscopy Shared Resource<
http://hiccc.columbia.edu/research/sharedresources/confocal>
Herbert Irving Comprehensive Cancer Center
Columbia University Medical Center
1130 St. Nicholas Ave., Room 222A
New York, NY 10032
Phone: 212-851-4613
[hidden email]<mailto:
[hidden email]>
--
ImageJ mailing list:
http://imagej.nih.gov/ij/list.html