Surreptitious photographing prevention technique by optically projecting a carrier-screen image

2014 Fiscal Year Final Research Report

• Project/Area Number: 24700164
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Perception information processing/Intelligent robotics
• Research Institution: Shizuoka University
• Principal Investigator: SHOGENJI Rui 静岡大学, 工学研究科, 准教授 (90432195)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: キャリアスクリーン画像 / 潜像技術 / 誤差拡散法 / 光学的情報ハイディング / デジタルカメラ / モアレ

Outline of Final Research Achievements

This study aimed for the development of a surreptitious photographing prevention technique by optically projecting a career-screen image, which is a kind of latent images, as an illumination onto a real object. By using experimental system, which employs an LCD projector, a secret noise pattern can be embedded by projecting a carrier-screen image. The embedded information can also be extracted by using an ordinary digital camera. We also developed an effective hiding method for the noise pattern by employing the error diffusion halftoning technique.

Free Research Field

光画像情報処理