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Re: MultiLevel Thresholding

Posted by Joel Sheffield on Sep 24, 2009; 9:18pm
URL: http://imagej.273.s1.nabble.com/Multilevel-Thresholding-tp3691007p3691009.html

Hi,

If you run Image>colors>split colors, you will get the three color
channels as separate images.  In the "blue" channel, the background
appears white.  I don't know enough to tell you which is bark and
wood in the image, but there are two levels of intensity that you
should be able to isolate.

Best of Luck,

Joel


> Here is a sample picture I am trying to process. I have bark and
> wood on a blue background. Looking to get the area fraction of bark
> to wood ignoring the background.
>
> http://www.imagecabin.com/?view=253819762b28b1bfac6b4cd4c
>
>
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> IMAGEJ Digest - 22 Sep 2009 to 23 Sep 2009 (#2009-261)
>
> Table of contents:
>
>  *   path on linux (4)
>  *   Where to put .class files? (2)
>  *   pan command in macro to display specified subregion? (3)
>  *   Mean Linear Intercept
>  *   Call multithreaded plugin from another plugin
>  *   "Magnetic lasso"-like tool
>  *   Remove slices from a virtual stack (6)
>  *   problem in opening series with LOCI plug-in (2)
>  *   How to release memory
>  *   stack reverser (2)
>  *   could not add a volume in imageJ3DViewer
>  *   [SOLVED] RE: "Magnetic lasso"-like tool
>  *   Bug when scaling VirtualStack to Stack
>
>  1.  path on linux
>     *   Re: path on linux<cid:[hidden email]> (09/22)
> From: Johannes Schindelin <[hidden email]>
>     *   Re: path on linux<cid:[hidden email]> (09/23)
> From: "Vera, Pedro L." <[hidden email]>
>     *   Re: path on linux<cid:[hidden email]> (09/23)
> From: Johannes Schindelin <[hidden email]>
>     *   Re: path on linux<cid:[hidden email]> (09/23)
> From: Benoit Zuber <[hidden email]>
>  2.  Where to put .class files?
>     *   Where to put .class files?<cid:[hidden email]> (09/22)
> From: Daniel Kalthoff <[hidden email]>
>     *   Re: Where to put .class files?<cid:[hidden email]>
> (09/23)
> From: Ben Tupper <[hidden email]>
>  3.  pan command in macro to display specified subregion?
>     *   pan command in macro to display specified
> subregion?<cid:[hidden email]> (09/23)
> From: Bill Christens-Barry <[hidden email]>
>     *   Re: pan command in macro to display specified
> subregion?<cid:[hidden email]> (09/23)
> From: Gluender <[hidden email]>
>     *   Re: pan command in macro to display specified
> subregion?<cid:[hidden email]> (09/23)
> From: Bill Christens-Barry <[hidden email]>
>  4.  Mean Linear Intercept
>     *   Re: Mean Linear Intercept<cid:[hidden email]> (09/23)
> From: Michael Doube <[hidden email]>
>  5.  Call multithreaded plugin from another plugin
>     *   Re: Call multithreaded plugin from another
> plugin<cid:[hidden email]> (09/23)
> From: Michael Doube <[hidden email]>
>  6.  "Magnetic lasso"-like tool
>     *   Re: "Magnetic lasso"-like tool<cid:[hidden email]>
> (09/23)
> From: Volker Baecker <[hidden email]>
>  7.  Remove slices from a virtual stack
>     *   Remove slices from a virtual stack<cid:[hidden email]>
> (09/23)
> From: Michael Doube <[hidden email]>
>     *   Re: Remove slices from a virtual
> stack<cid:[hidden email]> (09/23)
> From: Michael Doube <[hidden email]>
>     *   Re: Remove slices from a virtual
> stack<cid:[hidden email]> (09/23)
> From: Bill Mohler <[hidden email]>
>     *   Re: Remove slices from a virtual
> stack<cid:[hidden email]> (09/23)
> From: "Dong, Hualing L." <[hidden email]>
>     *   Re: Remove slices from a virtual
> stack<cid:[hidden email]> (09/23)
> From: Wayne Rasband <[hidden email]>
>     *   Re: Remove slices from a virtual
> stack<cid:[hidden email]> (09/23)
> From: Michael Doube <[hidden email]>
>  8.  problem in opening series with LOCI plug-in
>     *   problem in opening series with LOCI
> plug-in<cid:[hidden email]> (09/23)
> From: Berra Erkosar <[hidden email]>
>     *   Re: problem in opening series with LOCI
> plug-in<cid:[hidden email]> (09/23)
> From: Curtis Rueden <[hidden email]>
>  9.  How to release memory
>     *   How to release memory<cid:[hidden email]> (09/23)
> From: Eddie Iannuccelli <[hidden email]>
>  10. stack reverser
>     *   stack reverser<cid:[hidden email]> (09/22)
> From: Jane <[hidden email]>
>     *   Re: stack reverser<cid:[hidden email]> (09/23)
> From: Wayne Rasband <[hidden email]>
>  11. could not add a volume in imageJ3DViewer
>     *   could not add a volume in
> imageJ3DViewer<cid:[hidden email]> (09/23)
> From: Thomas Boudier <[hidden email]>
>  12. [SOLVED] RE: "Magnetic lasso"-like tool
>     *   [SOLVED] RE: "Magnetic lasso"-like
> tool<cid:[hidden email]> (09/23)
> From: "Vera, Pedro L." <[hidden email]>
>  13. Bug when scaling VirtualStack to Stack
>     *   Bug when scaling VirtualStack to
> Stack<cid:[hidden email]> (09/24)
> From: Adrian <[hidden email]>
>
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--
Joel B. Sheffield, Ph.D.
Biology Department, Temple University
1900 North 12th Street
Philadelphia, PA 19122
[hidden email]  
(215) 204 8839, fax (215) 204 0486
http://astro.temple.edu/~jbs