COLOR IMAGE ENHANCEMENT USING LAPLACIAN PYRAMID AND METHOD THEREOF

摘要

An apparatus and a method for enhancing picture quality of a color image by using Laplacian pyramid are provided to carry out brightness improvement of total image illumination by using a low resolution approximate image and to carry out local brightness contrast ratio improvement by using a band pass image, in order to increase saturation proper to the brightness value of the input image and to improve picture quality. A picture quality enhancing method comprises the steps of; extracting light and darkness data from a color image data(S20); generating low resolution image data and band pass image data, by using Laplacian pyramid from the light and darkness data; generating the global brightness improved image data by receiving the low resolution image data(S40); generating local contrast ratio improved image data by receiving the band pass image data(S50); and combining the global brightness improved image data with the local contrast ratio improved image data to generate the improved light and darkness data(S60).