INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND PROGRAM

摘要

An information processing apparatus, an information processing method and a program wherein digital watermarking information can be effectively embedded. An input part (11) receives a target image (F), a digital watermarking image (W) and a factor selection key (C) required for embedding the digital watermarking image (W). The input part (11) supplies the received target image (F) to a converting part (12) and also supplies the received digital watermarking image (W) and factor selection key (C) to a digital watermark embedding part (13). The converting part (12) subjects the target image (F) supplied from the input part (11) to a wavelet conversion and supplies a factor of the resultant frequency-converted target image (F) to the embedding part (13). The embedding part (13) determines a factor of the lowest subband related to an embedding factor given from the factor selection key (C). The embedding part (13) modulates, based on the determined factor of the lowest subband, the pixels of the digital watermarking image (W) to embed the digital watermarking image (W) in accordance with the intensity of a quantized parameter included in the factor selection key (C).