STATIC IMAGE DATA PROCESSING METHOD, STATIC IMAGE PROCESSOR AND RECORD MEDIUM WITH RECORDED STATIC IMAGE DATA PROCESSING PROGRAM

摘要

PROBLEM TO BE SOLVED: To easily confirm and grasp the existence of static image data which has been copied illegally by embedding one of bit data that constitute security data in coefficient values, which correspond to plural coefficient values that constitute a 1st kind of two-dimensional wavelet transformation coefficients. ;SOLUTION: A two-dimensional wavelet transformation coefficient generating means 5 implements two-dimensional wavelet transformation of specific static image data at least one time and seeks at least four kinds of two-dimensional wavelet transformation coefficient groups. A security data embedding means 6 partially selects two-dimensional wavelet transformation coefficients among two-dimensional wavelet transformation coefficients and embeds a part of data that constitute security data in coefficient value data of the selected two-dimensional wavelet transformation coefficients. An inverse wavelet transforming means 7 executes inverse wavelet transformation of the wavelet transformation coefficient values, in which the security data has been embedded.;COPYRIGHT: (C)1999,JPO