The output mode of an output device for rendering electronic images on an output medium may be characterized by different user-selectable settings such as: paper type, ink type, etc. Apart from the screen characteristics such as screen ruling, frequency and angle, a calibration curve can be communicated...http://www.google.co.uk/patents/US6067406?utm_source=gb-gplus-sharePatent US6067406 - Automatic calibration for output devices based on device output mode
