| 摘要 |
PROBLEM TO BE SOLVED: To provide technology, capable of inserting and extracting an electronic watermark effectively to secondary operation, such as deformation processes, compositing and superposition for vector data. SOLUTION: The digital watermark control method for the insertion and extraction of a digital watermark for vector data includes a step for requesting utilization of vector data which are an object of the control utilizing digital watermarks, a step to obtain the insertion information for showing the information to be inserted into the vector data requested to be utilized as a digital watermark, a step to insert the insertion information into the vector data as a digital watermark by performing phase operation corresponding for the obtained insertion information to the vector data, a step to transmit the vector data into which the digital watermark is inserted to the section requesting the utilization of the vector data, and a step to receive the vector data into which the digital watermark is inserted to utilize the vector data. |
