Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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A New Watermarking Algorithm for 3D Stereoscopic Image based on Depth and texture images

깊이 및 텍스쳐 영상 기반의 3D 입체 영상을 위한 워터마킹 알고리즘

  • Seo, Young-Ho (College of Liberal Arts, Kwangwoon University) ;
  • Kim, Bo-Ra (Department of Electronic Materials Engineering, Kwangwoon University) ;
  • Kim, Dong-Wook (Department of Electronic Materials Engineering, Kwangwoon University)
  • Received : 2013.12.25
  • Accepted : 2014.01.28
  • Published : 2014.03.31
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Abstract

Since the depth and texture images have been widely used for generating 3-dimensional stereoscopic image, the security of them have been focused. In this paper, we propose a new watermarking technique for copyright of stereo and multiview images which is generated in an arbitrary viewpoint by depth and texture image. After the mark space is selected for preserving watermark through DIBR (depth-image-based rendering) process which uses 3D warping, the texture image is transformed to the frequency coefficient using 2D DCT (discrete cosine transform). Some parts of them are quantized, which is the corresponding process to watermarking. The embedded watermark is not conformed by eyes, so we identified the invisibility of the proposed method. In case of appling attacks of general image process, we also identified the robustness of it.

3차원 영상을 생성하기 위해 깊이영상과 텍스쳐 영상의 활용이 보편화되면서 이들 영상에 대한 보호도 많은 관심을 받고 있다. 본 논문에서는 깊이와 텍스쳐 영상으로부터 임의의 시점에 생성되는 스테레오 및 다시점 영상의 소유권을 보호하기 위한 워터마킹 기법을 제안한다. 3D 워핑을 이용한 DIBR을 통해서 워터마크가 보존될 수 있도록 대상 영역을 설정한 이후에 2차원 DCT를 통해서 텍스쳐 영상을 주파수 계수로 변환한다. 이 계수의 일부를 양자화하여 워터마크를 삽입한다. 삽입된 워터마크는 확인이 되지 않기 때문에 비가시성을 확인할 수 있었고, 일반적인 영상처리 공격에 의해서 강인함을 확인하였다.

Keywords

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