newbie, looking for a digital caliper tool

Posted by unxzst on Jun 04, 2008; 2:50pm
URL: http://imagej.273.s1.nabble.com/newbie-looking-for-a-digital-caliper-tool-tp3696047.html

Hi all, I have a task of measuring the distance between dark lines on an
image. I'm sure this has been done before, but I can't find where.

What I need is a digital micrometer. A pair of lines that can be rotated,
moved and spread to get relative measurments between to pairs of lines is
all thats neede.

Here's the scope: a reflective coating on a Fizeau-Tolansky micrometer will
have fringes 2730Å apart, an area with no coating will show up as shifted
fringes. I need a pair of rotatable parallel lines to measure the distance
between the normal and shifted fringes, and calculate the relative
dispalcement. I'm trying to make this usable by people with minimal
computer understanding, and <100Å accuracy.
 
My problem: minimal java understanding. Just the tools included in ImageJ
are enough for an accurate measurment, but this needs to be very user-
friendly, and I can't find anything that is so. Please send my way any
links to related material, Java tutorials on creating a sort of digital
caliper, related work, anything! It will be greatly appreciated.