Circularity calculations are built into ImageJ 1.29 and later. Check “Circularity” in Analyze/Set Measurements and the Measure and Analyze Particles commands
will calculate and display the circularity.
This plugin is an extended version of ImageJ’s Measure command that calculates
object circularity using the formula
circularity = 4pi(area/perimeter^2)
A circularity value of 1.0 indicates a perfect circle. As the value approaches 0.0, it indicates an increasingly elongated polygon.
Note: this plugin does not work with the Analyze Particles command.
Author: Jeffrey Kuhn (firstname.lastname@example.org) The University of Texas at Austin Date: 2000/8/22 Source: MeasureMTF_.java API: MeasureMTF_.html Installation: Download MeasureMTF_.class to the plugins folder and restart
Author: Wayne Rasband (wsr at nih.gov) History: 2001/08/17: First version 2004/07/13: Works with stacks Source: Batch_Statistics.java Installation: Download Batch_Statistics.class to the plugins folder and restart
Author: Francois Richard (richard@SCIENCE.UOTTAWA.CA) Date: 2000/9/29 Source: Comment_Writer.java Installation: Copy Comment_Writer.class to the plugins folder and restart ImageJ. Description: This is a simple plugin that