Posted by
Henry Barwood on
Jun 22, 2007; 4:53pm
URL: http://imagej.273.s1.nabble.com/Method-to-plot-RGB-pixel-values-tp3699004p3699012.html
Hi Michael,
I tried this, and it certainly shows different color/intensity zones within
my images. By rotating the image, it is easy to visualize fields of CL
luminescence by mineral grains. Is there any way to extract data from the 3D
plot as an XY field (something like an XY plot of just the RG data)?
Henry
Henry Barwood
Associate Professor of Science, Earth Sciences
Department of Math and Physics
MSCX 312G
Troy University
Troy, Alabama
[hidden email]
-----Original Message-----
From: ImageJ Interest Group [mailto:
[hidden email]] On Behalf Of
Michael Schmid
Sent: Friday, June 22, 2007 9:48 AM
To:
[hidden email]
Subject: Re: Method to plot RGB pixel values?
Hi Henry,
you may have a look at the 3D Color Inspector/Color Histogram
http://rsb.info.nih.gov/ij/plugins/color-inspector.htmlIt plots the occurrence of pixels in three-dimensional R-G-B
space.
If you also want to do segmentation, you will need some type
of principal component analysis (PCA) plugin, just google up
"PCA" and "ImageJ". PCA plugins may require that you split the
RGB channels and create a stack.
Michael
________________________________________________________________
On 22 Jun 2007, at 16:08, Henry Barwood wrote:
> While reviewing an article on cathodoluminesce, I found an interesting
> technique where the 0-255 values for RGB pixels were plotted to obtain
> information about the provenance of some mineral grains. Is it
> possible to
> do something like this in ImageJ ? The plots were basically red
> pixel value
> plotted on blue pixel value because the green value did not vary a
> great
> deal (for this specific investigation). If there is a technique or
> plug-in
> for this sort of plotting, please let me know. Thanks.
>
>
>
> Henry Barwood
>
> Associate Professor of Science, Earth Sciences
>
> Department of Math and Physics
>
> MSCX 312G
>
> Troy University
>
> Troy, Alabama
>
>
[hidden email]
>
>