Pixel by mm equivalence in multiple pictures

Posted by alejandromerchan on Feb 04, 2009; 11:08pm
URL: http://imagej.273.s1.nabble.com/Pixel-by-mm-equivalence-in-multiple-pictures-tp3693860.html

Hello all,

People say there's no such thing as a stupid question. I don't know if I
agree with that completely, but I'll use it to my advantage. I'm new to the
analysis of images and pretty new to ImageJ, so, a lot of technicalities are
still beyond my grasp. But I'm getting there (I hope). One of those
technicalities is whether the number of pixels per mm is equal in all
images, provided that the images were taken under the same condition. To
make things clear, I have pictures of specimens that were scanned in the
same scanner, with the same size standard and under the same resolution. We
I use the "Set scale" I realized that the measurements are usually between
93-95 pixels/mm, and wondered if they should be the same to all images. If
not, I wonder if there's a way to standardize that.

Thanks for your help.

Alejandro Merchan

--
Hector Alejandro Merchan
Ph.D. Student
North Carolina State University
Department of Genetics