METHOD OF ENCODING DIGITAL PICTURE AND SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide highly efficient data compression with simple conversion by dividing an image into plural picture element areas, obtaining the luminance values of the respective picture element areas and the parameter of a color, merging the plural picture element areas and generating a primary block candidate. SOLUTION: Digital picture data is inputted to an image input means 11 and is divided into the plural picture element areas by a parameter making means 12. The luminance values and the parameter of the color are obtained on the respective picture element areas. A generation/classification means 13 merges the plural picture element areas and generates the primary block candidate and it is classified to one of the plural patterns. A linear approximation conversion part 14 groups the primary block candidate where the luminance value of the picture element area and the parameter of the color can linearly be approximated/converted as a primary block among the primary block candidates belonging to the same classification and a conversion coefficient is expressed by the parameter. Then, a secondary block is grouped and a multidimensional block parameter is finally obtained.