Patent ID: 9363444
Filing Date: 2016-06-07
CPC Classification: G06K,G06T,H04N

Claim Text:
1. A background model update method for an image sensing chip including an image sensor, comprising: determining whether an object enters a detection region of the image sensor, wherein the detection region is a three-dimensional space; and when it is determined that the object enters the detection region of the image sensor and at least one of the following judgments is determined yes: (1) that the object includes a plurality of pixels having brightness exceeding a predetermined difference value over the background model brightness; (2) that the object has a predetermined appearance feature; or (3) that the object shows a movement, reducing a level of updating a background model, whereby an accuracy to distinguish a foreground image in a new image sensed by the image sensor is increased; wherein the step of reducing the level of updating the background model includes: prolonging an update time of the background model.