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 Copyright Protection of Stereoscopic Image

스테레오 영상의 소유권 보호를 위한 워터마킹 기법

  • Received : 2012.03.02
  • Accepted : 2012.03.17
  • Published : 2012.08.31
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Abstract

In this paper, we propose a new watermarking technique for copyright protection of stereo image. The proposed technique embeds watermark to the region which corresponds to occlusion of the disparity map to be extracted by the proposed stereo matching and the frequency coefficient with the appropriate value. We use discrete wavelet transform for frequency transform tool. The proposed algorithm consists of stereo matching, watermark rearrange, mark space selection, and watermark embedding/extracting. We tested the experiment about 4 stereo images which are from Middlebury site. We embedded the watermark to 4 stereo images and extracted it from the images after attacks. We also visually analyzed the watermark embedding images in 3D TV environment.

본 논문에서는 스테레오 영상의 소유권 보호를 위한 워터마킹 기법을 제안한다. 제안한 기법은 스테레오 정합을 통해서 얻어진 변위 맵에서 폐색 영역에 해당하면서 적절한 주파수 계수를 갖는 영역에 워터마크를 삽입한다. 주파수 변환 도구로는 이산 웨이블릿 변환을 사용한다. 제안한 알고리즘은 스테레오 정합, 워터마크 재배열, 워터마크 위치 선정, 그리고 워터마크 삽입 및 추출로 구성된다. 미들버리에서 제공하는 4가지 실험 영상에 대해서 실험을 수행하였다. 4 가지 영상에 대해서 워터마크를 다양한 강인성을 갖도록 삽입하였고, 이들에 대해서 다양한 공격에 대한 워터마크 추출율을 검출하였다. 또한 3D TV에서 다양한 워터마크 삽입 영상을 시각적으로 분석하였다.

Keywords

References

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