Re: Information about Set Measurements

Posted by Stefan Helfrich-2 on May 05, 2017; 4:47am
URL: http://imagej.273.s1.nabble.com/Information-about-Set-Measurements-tp5018655p5018662.html

Dear Adrian, dear Theresa,

as Theresa has already pointed out, you can find more information on the
measurements at
https://imagej.nih.gov/ij/docs/guide/146-30.html#toc-Subsection-30.7

Best,
Stefan

On 05/03/2017 05:13 PM, Swayne, Theresa C. wrote:

> 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.html
>
> This is the link to the browsable source code for ImageJ:
> https://imagej.nih.gov/ij/developer/source/index.html
>
> Hope 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
>
> --
> 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: [phone]
> [hidden email]<mailto:[hidden email]>
>
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>
>
>
>
> --
>
>    - 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: [phone]
> [hidden email]<mailto:[hidden email]>
>
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html

--
Dr. Stefan Helfrich
Bioimaging Center (L931)
University of Konstanz

PO Box 604
78457 Konstanz
Germany

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