title: Area measurement of fluorescent powder from finger contacts - batch processing
body: <p>I have 120 photos like the one below showing the amount of fluorescent powder deposited onto a surface when it is touched by fingers. The photo is taken under UV light. You can see 5 finger prints and the reflection from the light source.</p>
  
  <p>I'd like to know if there is an automated way of estimating the area of the fluorescent finger prints in batch mode. We have been using <em>image J</em> to manually select a particular print and estimate the area. Is it possible to automatically recognise the fingerprint in imageJ and measure it for all 5 prints on each of the 120 photos?</p>
  
  <p>Note: Clearly you can see the print on the right is quite well defined but the one of the left is quite diffuse.</p>
  
  <p><a href="https://i.stack.imgur.com/OkrX7.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OkrX7.jpg" alt="enter image description here"></a></p>