The file anisodiff.m is copyright 

 Peter Kovesi   pk@cs.uwa.edu.au
 Department of Computer Science & Software Engineering
 The University of Western Australia

The images were taken using a torch light illumination and using a Logitech Webcamera.

In Matlab

Open an image and perform anisotropic diffusion and then perform centre detection using circle_detect.m

Copyrigth to the other images and files rest with 

Prateek Dayal,
ECE, IITG
prateek@iitg.ernet.in