Analyze particles AR error related to angle of ellipse

Hi, i want to analyze some ellipses created using photoshop, i know all their geometric parameters but i notice that sometimes ImageJ gives me wrong aspect ratio value, i’ ve done multiple measurement and often the angle value is 0 or 179.9999, but there are some case in which the software give me angle = 180 and the AR is wrong.
What can i do to solve this problem?

Hi @lxxa94,

It’s hard to say what the issue is without some more information. Could you please share:

  1. a sample image with some ellipses that give incorrect values
  2. the macro or the exact steps you take to do the measurement
  3. the results you obtain from taking those steps on that particular image?

This will make it possible for others to try to replicate the issue and figure out the underlying problem.

Hope this helps.

1 Like