ELECTRONIC WATERMARK EMBEDDING DEVICE

摘要

Information embedded in a document image is converted to a watermark symbol sequence expressed by a dot pattern, each watermark symbol is embedded in a subject embedding region, and embedding advisability is judged by checking whether it is detected. As a result, the watermark symbol is embedded in a region where embedding is possible. Further, the watermark symbol sequence is divided into a plurality of blocks, which are embedded in a document image as a plurality of watermark packets.