Re: Borders of fossil leaves: enhancing their margins and edges

Posted by Robert Smith on Oct 16, 2020; 3:57pm
URL: http://imagej.273.s1.nabble.com/Borders-of-fossil-leaves-enhancing-their-margins-and-edges-tp5024065p5024077.html

Hello Jorge,
If I knew how much you know about image analysis I could recommend more and varied approachs to utilizing this image. Such as the use of luts, maths and threashholding. A lot can be done with this image beyond this example.Try some luts on it. Just let me know if you are interested.
Bob


________________________________
From: Jorge A. Santiago-Blay <[hidden email]>
Sent: Thursday, October 15, 2020 9:24 AM
To: [hidden email] <[hidden email]>
Subject: Borders of fossil leaves: enhancing their margins and edges

Dear ImageJ users:

A colleague of mine and I are calculating areas of fossil leaves. These
fossils often do not have a lot of contrast with the rest of the solid (the
so-called "rock" or, more technically,matrix). I have two questions:

a.  Is there a way to enhance the contrast of the leaf with respect to the
matrix so that we can trace it with more confidence? If "yes", what is the
sequence of commands in ImageJ.

b. Sometimes the fossil is located on the border of the "rock". Is there a
way to tell ImageJ to automatically follow the edge of the rock until it
finds the origin of the area trace? It would be faster and more exact than
us, humans, doing it by hand.

Gratefully,

Jorge

Jorge A. Santiago-Blay, PhD
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