| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus which embeds a digital watermark of high detectability while maintaining ink discharge performance and detects the digital watermark information precisely. SOLUTION: In order to maintain high discharge performance of a recording element, a preliminary discharge data adding means adds data for discharging ink preliminarily from the recording element to a recording medium. A means for embedding a digital watermark is also provided. A duplicate processing prevention means prevents a preliminary discharge permission region and a digital watermark embedding region from being processed in duplicate. The preliminary discharge permission region is a region where the preliminary discharge data adding means is allowed to add the preliminary discharge data to the recording medium, and the digital watermark embedding region is a region where the digital watermark embedding means embeds of the digital watermark. COPYRIGHT: (C)2009,JPO&INPIT |
