Image after conversion to 8-bits, smooth,
find-edges, binary/threshold, and invert.
The hough space. Lighter regions represents
most probable places for finding centers of circles
of predefined radius. The “number of circles”, X,
entered by the user, will be used to choose the X most
lightest points in the hough space. The user can also
enter a threshold for the histogram of the Hough Space,
instead of the number of circles.
Image with the center of the two iris marked.
Notice that, in this example, we are looking for a
predefined number of circles (2) with predefined
radius (11). (The algorithm tolerate a small error in
Author: Wayne Rasband (email@example.com) Date: 2000/8/17 Source: Circularity_.java Installation: Circularity calculations are built into ImageJ 1.29 and later. Check “Circularity” in Analyze/Set Measurements and the
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: Greg Joss (email@example.com) Date: 2001/03/13 Source: ResultsAndText_gj.java Installation: Expand the results.zip archive in the plugins folder and restart ImageJ. Description: This plug-in extends ResultsTable
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