Robust and Secure InIm-based 3D Watermarking Scheme using Cellular Automata Transform

국문 초록 (Abstract)

본 논문에서는 셀룰러 오토마타 변환을 이용한 집적영상 기반의 강인하고 안전한 3D 워터마킹 방법을 제안한다. 본 집적영상 기반의 워터마킹 방법에서는 먼저 워터마크를 컴퓨터 픽업을 하여 요소영상 워터마크로 변환한 후 보호하려는 영상에 삽입한다. 요소영상의 워터마크는 원 워터마크를 확실하게 복원할 수 있다. 그러나 요소영상의 3D 성질은 보안에 취약하므로 셀룰러 오토마타 변환 영역을 이용하여 보호하려는 영상에 요소영상의 워터마크를 삽입하여 문제를 해결한다. 셀룰러 오토마타 변환 영역을 사용하므로써 하나의 비밀 키만으로 워터마킹 알고리즘의 안정성이 향상된다. 마지막으로 실험을 통하여 제안 방법은 여러 가지 공격에도 강인성과 안정성을 가지고 있음을 증명한다.

다국어 초록 (Multilingual Abstract)

A robust and secure InIm(Integral imaging)-based 3D watermarking scheme using cellular automata transform (CAI) is proposed. In the InIm-based 3D watermarking scheme, the elemental image array (EIA) watermark for the target watermark which has to be detected, is synthesized from the computational pickup process of InIm and embedded in a cover image. The EIA watermark can provide a robust reconstruction of the target watermark However, the 3D property of the EIA watermark causes a weakening of the security. To overcome this problem, the proposed method uses the CAT domain to embed and extract the EIA watermark in the cover image. The use of CAT significantly improves the security for our watermarking algorithm using a single secure key only. Experiments are presented to show that the proposed scheme shows robust and secure performances against various attacks.

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