IR Hiding: Use of Specular Reflection for Short-Wavelength-Pass-Filter Detection to Prevent Re-recording of Screen Images

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• 作者：Isao Echizen (15) (17)
  Takayuki Yamada (17)
  Seiichi Gohshi (16)
  
  15. Graduate University for Advanced Studies ; Kanagawa ; Japan
  17. National Institute of Informatics ; Tokyo ; Japan
  16. Kogakuin University ; Tokyo ; Japan
  
• 关键词：Short wavelength pass filter ; Infrared cut filter ; Infrared absorption filter ; Specular reflection ; Infrared camcorder
• 刊名：Lecture Notes in Computer Science
• 出版年：2015
• 出版时间：2015
• 年：2015
• 卷：8948
• 期：1
• 页码：38-54
• 全文大小：3,311 KB
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• 作者单位：Transactions on Data Hiding and Multimedia Security X
• 丛书名：978-3-662-46738-1
• 刊物类别：Computer Science
• 刊物主题：Artificial Intelligence and Robotics
  Computer Communication Networks
  Software Engineering
  Data Encryption
  Database Management
  Computation by Abstract Devices
  Algorithm Analysis and Problem Complexity
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1611-3349

文摘

We previously proposed using infrared (IR) LEDs to corrupt recorded content to prevent the re-recording of images displayed on a screen. This method is based on the difference in sensory perception between humans and devices and prevents re-recording by adding IR noise to the images displayed on the screen without it being detected by the human eye. However, it cannot prevent re-recording using digital camcorders equipped with a short wavelength pass filter to eliminate the noise. We have now improved our method by adding a simple countermeasure against such attacks. It detects IR light reflected off the filter by using the IR specular reflection properties of the filter and thereby detects re-recording using digital camcorders equipped with a short wavelength pass filter. We implemented this countermeasure by adding one of two types of IR LEDs (bullet type and chip type with lens) to our prototype re-recording prevention system, which is installed on a B3-size screen. Testing showed that this enhanced system can detect camcorders with an attached short wavelength pass filter.