Patent ID: 6067406
Filing Date: 2000-05-23
Classification: H04N

Abstract:
A method for rendering by an output device a continuous tone image having multiple electronic grey levels, said method comprising the following steps:establishing for said output device at least two different tone transfer functions, each tone transfer function for transforming each electronic grey level of said continuous tone image to a corresponding stimulus value for said output device, said transfer function being independent of the location of said electronic grey level in said continuous tone image, and the number of different stimulus values from said transfer function being substantially equal to the number of different electronic grey levels, each tone transfer function being dependent on an output mode of said output device;selecting an output mode of said output device;selecting at least one transfer function from said at least two different tone transfer functions, based upon said output mode; and,transforming said electronic grey levels of said continuous tone image by said selected one transfer function for rendering said continuous tone image by said output device.