Regular Paper

[OPTICAL REVIEW Vol. 21, No. 3 (2014) 237-242]
© 2014 The Japan Society of Applied Physics

Hiding a Checkered-Pattern Carrier-Screen Image in a Camouflaged Halftone Image

Rui SHOGENJI* and Junji OHTSUBO

Department of Mechanical Engineering, Graduate School of Engineering, Shizuoka University, Hamamatsu 432-8561, Japan

(Received December 13, 2013; Accepted February 12, 2014)

As carrier-screen images, we have developed checkered-pattern carrier-screen images, which can be physically decoded by superimposing a checkered pattern. We also proposed a decoding method by image sampling with an ordinary compact digital camera. To obtain a better decoding result, each carrier-screen image should be output at a low resolution. However, secret information can be detected when you observe the image carefully. Thus, a hiding process is an important technique. In this paper, we propose an advanced hiding method by embedding the carrier-screen image into another significant image to generate a camouflaged halftone image. The proposed embedding method can be performed through a simple sequential process of blending and halftoning.

Key words: carrier-screen images, information hiding, checkered pattern, halftoning, error diffusion


*E-mail address: shogenji@sys.eng.shizuoka.ac.jp

 

© 1994-2014 The Japan Society of Applied Physics
Produced, Developed, and Maintained by The Optical Society of Japan (An Affiliate of the Japan Society of Applied Physics)
Printed in Japan by Komiyama Printing Co., Ltd.

mail to Editorial Office, OPTICAL REVIEW