METHOD FOR DISTINCTING BACKGROUND AND FORWARD SCENE PLAN AND METHOD FOR REPLACING BACKGROUND IN SCENE IMAGES

摘要

1. A method for distinguishing between the background and foreground of a scene in images recorded by an electronic camera, in which the background shows an arbitrary image encoded by encoding so that the image is visible to the direct observer of the background, while by encoding the background is distinguished from the unencoded foreground in the signal, which formed by a camera image sensor recording images. 2. The method according to claim 1, wherein said encoding includes a background showing the image as a periodic sequence of components making up the image, at least one image parameter affecting the image reproduction being changed during each period, the exposure of the camera image sensor in synchronization with reproducing a given component. 3. The method of claim 2, wherein the time averaging of the encoded image in at least one period corresponds to said image. The method according to claim 2 or 3, in which the duration of the period of the recording cycle of the image sensor is less than or equal to the duration of the period of the periodic sequence of the display components. The method according to any one of claims 1 to 3, in which the encoding includes a background displaying periodically alternating different image components, the components of each period correspondingly making up the entire image, wherein the display of the components is synchronized with the exposure of the camera so that the camera records only one of the components in at least one, preferably each, period. 6. The method according to claim 5, in which the component recorded by the camera is selected�