Wang Hong-wei. Video optical encryption technology based on liquid crystal light valve[J]. Journal of Applied Optics, 2015, 36(3): 398-402. DOI: 10.5768/JAO201536.0302003
Citation: Wang Hong-wei. Video optical encryption technology based on liquid crystal light valve[J]. Journal of Applied Optics, 2015, 36(3): 398-402. DOI: 10.5768/JAO201536.0302003
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Video optical encryption technology based on liquid crystal light valve

  • Engineering University of CAPF,Xi-an 710086,China

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    • Abstract
  • Encrypted transmission of high-definition video surveillance is an important researching area, but with the continuous improvement of the clarity of the video image, the existing video encryption algorithm is facing a severe test. Therefore, we explored the feasibility of using optical encryption and decryption for video transmission, proposed the single-channel video optical encryption technology based on liquid crystal light valve and double random phase encoding. This technologys time consuming of encryption and decryption was almost zero,which could greatly improve the performance of video transmission. Additional, due to the optical encryption technology was used only in the front end and the end of the existing video transmission link, and did not involve video coding and transmission, the availability and versatility of the system could be enhanced. At last, the method was simulated by using Matlab software. The results show that the encrypted image of each channel is close to white noise,so it is almost impossible to recover the original image. Meanwhile, after decryption, the image can be completely restored. Therefore, this method has broad promotion and application value in the growing popularity of high-definition video in the future.
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