A METHOD FOR REVERSIBLE COLOR TRANSFORM USING CANONICAL SIGNED DIGIT

摘要

A method for reversible color transform using a canonical signed digit (CSD) is disclosed. The method includes (1) transforming respective color coordinate coefficients to CSD numbers; (2) extracting a common pattern from the CSD numbers and previously performing computation with respect to the common pattern; and (3) performing a reversible color transform, using the previously computed result. The method can enhance the speed of invertible integer color transform as a canonical signed digit (CSD) system and a common pattern technique are applied to the invertible integer color transform which can precisely implement an inverse transform matrix without causing a rounding-off error according to integerization.