[4Pin1] インタラクティブ(2)

[4Pin1-51] A Preliminary Study on Coevolutionary Simultaneous Design of Digital Watermark for Two-dimensional Codes and Coded Aperture

〇Shingo Takeshita¹, Hiroki Hamasaki¹, Takeru Maehara¹, Kentaro Nakai¹, Toshiki Sonoda², Michihiro Mikamo¹, Hiroshi Kawasaki², Hajime Nagahara³, Satoshi Ono¹ (1. Department of Information Science and Biomedical Engineering, Graduate School of Science and Engineering, Kagoshima University, 2. Department of Advanced Information Technology, Graduate School of Information Science and Electrical Engineering, Kyushu University, 3. Institute for Datability Science, Osaka University)

Keywords:cooperative coevolution, digital watermarking, coded aperture

In recent years, authentication using two-dimensional codes has become widespread. However, it is easy to duplicate two-dimensional code, and inappropriate duplication of 2D codes is apprehended. Therefore, a method of detecting duplication by embedding a digital watermark in a two-dimensional code has been proposed. However,when the watermark is embedded in high-frequency components of a cover image, the watermark components may be lost due to photographing. A coded aperture is a technique that maintains frequency components included in the captured image. In this research, we propose a simultaneous design method of a digital watermark and a coded aperture, which allows extracting watermark with wide photographing depth range and rotation. Experimental results show that the proposed aperture could extract watermarks from blurred images regardless of with or without deconvolution.