Pattern Change Discovery Between High Dimensional Datasets

Matlab code of the LRatio algorithm can be downloaded here.

The Google News datasets can be downloaded here.

A Matlab matrix of vectorized faces can be downloaded here and the original picture can be downloaded here.




Detecting the difference between image datasets:

Note that for each pair of faces between A and B, there is a face rotation in 3D space and so a simple difference between the two images does not lead to the detection of the only eye changes.



These videos showcase the difference between two competing algorithms - MRL's LRatio and H. Zhang, J. Shi and M. Visontai. Detecting unusual activity in video. Proc CVPR 2004. Note that the videos will flash RED when activity is detected.