Login  Register

Measuring RGB Color data within a non-rectangular ROI

Posted by Cmhulbert on Sep 25, 2015; 5:03pm
URL: http://imagej.273.s1.nabble.com/Measuring-RGB-Color-data-within-a-non-rectangular-ROI-tp5014469.html

The title says it all. I'm attempting to write a small macro that will
segment an image, based on a SIOX file,turn it into a mask, do some
processing, and then add all the outlines in the mask as ROIs to the ROI
manager. This part, I have been able to do successfully so far.

The issue is that I'm trying to then iterate over each ROI and return a
results table, with a row for each ROI, and columns for size, Red value,
Blue value, and Green value. I know you can get size from the "measure"
command, but I haven't been able to successfully get RGB values (except in
histogram form).

Also, if the ROI is not rectangular, does it extrapolate the extreme points
and measure as if it were a rectangular ROI? I read somewhere that it does
that, but that would make this color date include a lot of the background,
which I am hoping to avoid.

Best,
Caleb

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html