Patent ID: 6671071
Filing Date: 2003-12-30
Classification: H04N

Abstract:
A circuit for generating a threshold bias signal for processing n color separations representing a color image, the circuit comprising:a threshold bias register having a threshold bias input and having a threshold bias output for communicating the threshold bias signal; a threshold bias adder having a current threshold bias input and a threshold bias adjustment input and having an adjusted threshold bias output for communicating an adjusted threshold bias signal, wherein the threshold bias output of threshold bias register is coupled to the current threshold bias input of the threshold bias adder; and a threshold bias adjustment circuit having a pixel state input and a threshold bias adjustment output for communicating a threshold bias adjustment signal, wherein the threshold bias adjustment output of the threshold bias adjustment circuit is coupled to the threshold bias adjustment input of the threshold bias adder, and wherein the pixel state input of the threshold bias adjustment circuit is coupled to a pixel state signal; wherein the threshold bias adjustment circuit is operable to generate one of a plurality of threshold bias adjustment values as the threshold bias adjustment signal in response to the pixel state signal.