Patent ID: 6633675
Filing Date: 2003-10-14
Classification: G06T

Abstract:
A compression apparatus for compressing image data comprising:a reduced-image generating processor that transforms original image data partitioned into first blocks, each of which is composed of a plurality of pixels, to reduced-image data composed of a smaller number of pixels than that of said original image data; a fluency transform processor that applies a fluency transform to said reduced-image data to generate expanded-image data partitioned into second blocks corresponding to said first blocks, said fluency transform having a plurality of modes; a mode setting processor that selects one mode from said plurality of modes, said expanded-image data being generated in accordance with said selected one mode; an error calculating processor that calculates an error, which represents a difference between said original image data and said expanded-image data, said error calculating processor calculating said error in each of said plurality of modes; and an optimum mode determining processor that determines an optimum mode, by which said error becomes minimum, among said plurality of modes.