Patent ID: 7747015
Filing Date: 2010-06-29
Classification: H04N

Abstract:
1. A method of deterring the copying of visual images displayed on a movie screen, comprising: displaying the images on the screen using a system wherein the displayed spectrum forming individual images is a combination of at least thee color components in the visible spectrum, and varying by means of a color converter relative values of the at least three color components to represent the color spectrum of the visual images being displayed in a manner that is metameric to the human eye and therefore does not vary the color representation by the human eye of the images displayed on the screen, wherein varying the relative values of the at least three color components alters the visible spectral content of the visual images in a manner that is metameric and thus imperceptible to the human eye but not metameric to a video camera having a spectral sensitivity different from the spectral sensitivity of the human eye, and wherein varying the relative values of the at least three color components is performed in a manner that causes changes in color representations of images reproduced from the images recorded by a video camera having a spectral sensitivity different from the spectral sensitivity of the human eye to be perceived by the human eye to have a degraded quality.