Variance adaptation by online cumulative average (Feb. 2004 - )

EXPERIMENTAL RESULTS 

Assuming all pixels are background events, they are all accepted to the pixel's codeword. The codeword mean and variance are updated accordingly as we discussed. 

Set a critical value t* as 4, 3, 2, ... to see how this codeword learning affects the variance adaptation.  Multiple codewords are allowed.

NOTES: 

s2_init = 9.0 (alpha = 0.3333, beta=0.1)

s2_init = 2.5

There are three sequences 'lowfixed', 'highfixed', and 'variable' which were recorded for one minutes. TD = threshold for detection, TC = threshold for coding.

                    Low fixed

                    High fixed

                    Variable

                    Low fixed

                    High fixed

                    Variable

                    Variable