An image data watermarking technique using the average of a Fresnel-transformed pattern.

Hidetoshi Seto Yoshinao Aoki Seok Kang An image data watermarking technique using the average of a Fresnel-transformed pattern. 534-537 2001 ICIP (2) http://dx.doi.org/10.1109/ICIP.2001.958546 db/conf/icip/icip2001-2.html#SetoAK01