Patent ID: 8218864

Claim:
A method for maintaining an image background by a plurality of Gaussian models, comprising steps of: (a) capturing an image frame having a plurality of pixels to obtain a background information; (b) calculating the background information to establish a primary Gaussian model; (c) capturing a plurality of continuous image frames in a time period to obtain a graphic information and calculating the graphic information to establish a secondary Gaussian model; (d) repeating step (c) to establish a plurality of said secondary Gaussian models; and (e) comparing two of the secondary Gaussian models, updating learning for the primary Gaussian model by the secondary Gaussian models if the two graphic informations corresponding to the two secondary Gaussian models are both attributable to the background information, and maintaining the background information of the primary Gaussian model without updating the learning for the primary Gaussian model if at least one of the two graphic informations corresponding to the two secondary Gaussian models are unattributable to the background information.