A dynamic (t, n)-threshold secret sharing scheme based on factorization is proposed in this paper. It has following properties: (1) the dealer can renew the secret key of the system without renewing the shadows of the participants; (2) when some participants’ shadows are revealed, they can be renewed without any effect on the others; (3) a new shadow can be generated for a new participant witho...

Identifying moving objects from a video sequence is a fundamental and critical task in many computer vision applications. We develop an efficient adaptive object segmentation algorithm for color video surveillance sequences; background is modeled using Multiple Correlation Coefficient (R_(a.bc)) using pixel-level based approach. Segmented foreground generally includes self shadows as foreground...