ENERGY CORRECTION DEVICE THROUGH TRANSFORM DOMAIN PIXEL GROUPING AND METHOD THEREOF

摘要

Disclosed are an improved energy correction device through pixel grouping and a method thereof. According to an embodiment of the present invention, the energy correction device which corrects an error of an image comprises: a pixel value transformation unit which performs pixel value transformations for an original image and a decoded image, and obtains each piece of directional information; Fig. 6 S601 Obtain directional information by performing pixel value transformation for image S603 Classify obtained directional information into plurality of domains, and extract group energy representative value from each of classified domains S605 Calculate energy correction value on the basis of difference between group energy representative value extracted from decoded image and group energy representative value extracted from original image AA Start BB End a group energy extraction unit which classifies each piece of obtained directional information into a plurality of domains, and extracts group energy representative values that represent the corresponding domains from each of the classified domains; and a correction value calculation unit which calculates an energy correction value on the basis of a difference between a group energy representative value extracted from the decoded image and a group energy representative value extracted from the original image.