Patent ID: 11887289
Assignee: nan
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. A system of generating an image occlusion key, comprising:
a camera located at a fixed location at an event venue;
a programable digital computer functionally connected to said camera;
designating by an operator a target location within an event venue, said target location being an area deemed suitable for augmenting with a virtual augmentation;
obtaining by said operator using said camera, a target image of said target location; and,
said computer being programmed to perform the functions of:
obtaining a stream of current images of said event venue using said camera;
creating a stationary-stream of from said current images, said stationary stream having each of said stream of current images transformed to match camera-pose attributes of said target image such that each pixel representing said target location occurs at the same x, y location in each of said stationary stream of images;
creating a segmented image stream from said stationary-stream wherein each image of said segmented image stream is segmented into foreground and background pixels;
combining said background pixels of said segmented image stream to obtain a background pixel map of said target location said background pixel map having, for each pixel of said target region, a history of color values labeled as being one of said background pixels, and, wherein, combining said segmented image stream to obtain said background pixel map comprises associating each pixel within said target location with color values of all pixels designated as background pixels at that pixel location in each image of said segmented image stream; and,
wherein all pixels in said target location of one of said current images that have color values within a predetermined range of the smallest enclosing sphere of the color values of pixel values associated with the corresponding pixel from the background pixel map are assigned an alpha value in a range of 1 to 254 proportional to their distance from the smallest enclosing sphere; and,
using said background pixel map to obtain said image occlusion key for one of said current images.