Patent ID: 8948245
Filing Date: 2015-02-03
Classification: G06K,G06T,G08B,H04N

Abstract:
1. A method comprising displaying graphical output to an operator representing the activity in a monitored space detected by a plurality of detection devices, each one of which is configured to output a sequence of images, said method comprising the steps of: representing said plurality of detection devices on a display device as an array of regular polygons, wherein each one of the regular polygons represents a different one of the plurality of detection devices and the regular polygons are arranged topologically according to locations of the plurality of detection devices in the monitored region; for each of the sequence of images outputted by each one of the plurality of detection devices: deriving, by a processor, a background model from the sequence of images detected by the detection device, which background model defines expected pixel values for said sequence of images, performing, by a processor, foreground classification of pixels in each one of the images with reference to said background model, in which pixels having expected values are classified as belonging to the background and pixels having unexpected values are classified as belonging to the foreground, analyzing, by a processor, the level of activity in each one of the sequence of images by measuring a number of pixels in each one of the images that have been classified as belonging to the foreground as a proportion to the total number of pixels in the image to obtain the level of activity for each one of the images; and displaying graphical output within each one of the regular polygons, said graphical output having a characteristic that is dependent upon the analyzed level of activity within the images outputted by its respective one of the plurality of detection devices, wherein said graphical output is different from the image outputted by said respective one of the plurality of detection devices.