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 21:
22. 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, letting through or reflecting electromagnetic radiation of at least one non-visible spectral range and a conversion device being disposed in front of the image sensor, which converts the non-visible electromagnetic radiation into visible light which is detected by the image sensor, wherein the electromagnetic radiation emanating from the scenery runs through the conversion device before impinging on the image sensor, which conversion device converts the non-visible electromagnetic radiation into visible light and blends it into the scenery from the perspective of the camera at the location of the background.