METHOD FOR FORMING MULTIPLE HISTOGRAM USING SUPER PIXEL AND LINEAR QUANTIZATION

摘要

PURPOSE: A method for forming a multiple histogram using a super pixel and a linear quantization is provided to reduce errors occurring at the edge of colors. CONSTITUTION: The method for forming a multiple histogram using a super pixel and a linear quantization includes following steps. The color, brightness and edge histograms are generated by using color information(Cr, Cb) and brightness information(Y) of compressed image data. The histogram is formed by grouping pixels of the image in one group, that is on a super pixel basis. A macro block is specified on the super pixel basis(S101) in the compressed image and a direct current value of discrete cosine transformation block four brightness(Y) is extracted. Then, whether an edge exists is determined(S102). Finally, a histogram component corresponding to the edge pattern is increased(S104) when an edge exists.