INFORMATION EMBEDDING DEVICE, INFORMATION READ DEVICE, AND COMPUTER-READABLE RECORDING MEDIUM CONTAINING PROGRAM FOR THEM

摘要

Information embedding is performed by extracting vertices composing a polygon from vector data, and changing the number of points that exist on the sides of the polygon based on the embedment information. Information reading is performed by extracting points existing on the sides of the polygon from the embedment information embedded vector data, and reading the embedment information according to the predetermined rule.