Patent ID: 11950014
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. Method for differentiating between background and foreground of a scenery in images recorded by an electronic camera, the background showing an arbitrary image coded with a coding such that the image is visible for a direct observer of the background, and the background being differentiated from a non-coded foreground in a signal produced by an image sensor, recording the images, of the camera by the coding, wherein the coding comprises the background radiating only colours selected from at least one range of the visible spectrum,
the light emanating from the scenery running through a colour filter before impinging on the image sensor, which colour filter tones down those ranges of the visible spectrum from which the colours of the image are selected, and letting through ranges of the visible spectrum situated between these ranges without being toned down, the background being differentiated from the foreground by keying onto the ranges of the spectrum toned down by the colour filter in front of the image sensor.