Apparatus and method for improving color transition using nonlinear laplacian

摘要

An apparatus and a method for improving color transition using a nonlinear Laplacian is disclosed, wherein color transition is controlled through nonlinear Laplacian operation, thereby simplifying algorithm and reducing the influence of noise, and wherein a nonlinear Laplacian operation unit detects a minimum and a maximum in chrominance signals located within a region of a mask having a predetermined size centered at an input chrominance signal and calculates a correction signal, a transition increase direction-detecting unit determines a transition increase direction signal based on the calculated correction signal, a transition magnitude-generating unit generates a transition magnitude signal based on the correction signal, and a transition control unit controls the transition of the input chrominance signal based on the minimum and the maximum, the correction signal, the transition increase direction signal and the transition magnitude signal and generates an output chrominance signal.