RGB analysis

Posted by Jinglei Yang on Jan 02, 2008; 10:46pm
URL: http://imagej.273.s1.nabble.com/Superimpose-tp3697641p3697646.html

Dear All,

I have a question about how to analyze the color change of a small sphere.

The sphere is compressed with increasing load. The projective image
sequences are recorded using a color imaging system. Its color will change
and expand from gray to purple/blue starting from the center of the bead
with increasing load.

I use Plugins->Macros->RGB histogram to analyze the RGB change. Both the
entire area of the sphere and a constant centralized area are considered.
But the byte values of RGB all decreased with increasing load! The values of
Red and Green decreased more obviously than that of Blue.
However, I thought the value of blue should increase because I can watch the
color changing to purple/blue by naked eyes.

I have no background of chromatics. Does anyone here give any suggestions
about this issue?

Thank you very much!
Happy New Year!

Jinglei Yang
@UIUC