Abstract—Among the newly explored research areas of
digital watermarking, various types of data embedding
technologies for vector graphics have drawn more and more
attention. The features of vector graphics on the data
expression and use were analyzed. The requirements of
watermarking for vector graphics are discussed. Utilizing the
characteristics of vector graphics, an adaptive classification
method is proposed, which is based on the number of vector
graphics entities’ vertices. To embed digital watermark in
the vector graphics by changing the statistical properties of
different classification, this can be achieved by modifying the
vertex value within an error tolerance. The extraction of
watermark does not require the original vector graphics.
Experiments show that this scheme has good transparency
and robustness.