Patent ID: 7343043
Filing Date: 2008-03-11
Classification: G06T,H04N

Abstract:
1. A picture image compression apparatus that compresses data of a picture image to a predetermined target data amount, comprising: picture image creation means for creating, from the picture image, a reduced-size picture image having a reduced number of picture elements of the picture image; preliminary compression means for compressing the reduced-size picture image to a preliminary compression target data amount by transforming the reduced-size picture image, quantizing the transformed reduced-size picture image, and coding the quantized reduced-size picture image; and compression means for compressing the picture image to the predetermined target data amount by transforming the picture image, quantizing the transformed picture image, and coding the quantized picture image; wherein the preliminary compression means derives a compression level of the picture image based on a result of compressing the reduced-size picture image; and wherein the compression means compresses the picture image to the predetermined target data amount, based on the compression level derived by the preliminary compression means.