Towards a combining scheme for compression and watermarking for 3D stereo images
(2011)
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- Authors
- Supervisors
- Macq, Benoît
- Abstract
- Reproducing a natural and real scene as we see in the real world everyday is becoming more and more popular. Stereoscopic and multi-view techniques are used for this end. However, the fact that more information is displayed requires supporting technologies such as digital compression to ensure the storage and transmission of the sequences. In addition, the fast development of communication technologies and the exponential increase of internet users have made the protection of intellectual property rights and the prevention of reproducing original contents a very challenging issue. This thesis is devoted to compression and protection of Intellectual Property Rights associated with 3D Stereo Images. Based on a predictive framework, the proposed scheme combines compression and watermarking for 3D stereo images. An adaptive scheme for stereo image coding is proposed. Our goal is to design an efficient transform that reduces the existing redundancy in the stereo pair. This approach is inspired by the Lifting Scheme (LS). Aiming to reduce the residual error, we first design an optimized filter for inter prediction, a local spatial filtering is incorporated after disparity compensation. Second, directional inter prediction is investigated. The predictor is adapted by exploiting local orientation information denoting to the optimal way of prediction for each pixel. Finally, a residual LS is proposed to fit with the particularities of the transformed residue tuned by the disparity map. The second aim is to design a watermarking scheme for 2D, 3D stereo image which can be integrated in the DCinema decoding pathway. We have proposed an adaptive exhibition watermarking method during the decoding phase. This method is QIM-based and is designed to fit in the JPEG2000 decoding pipeline. Based on the properties of the DWT related to the human visual system, we define a pixel-wise masking vector that will tune the watermarking scheme taking into consideration a number of constraints. An extension of the 2D exhibition watermarking scheme is applied to stereo images. A disparity guided watermarking technique with an improved perceptual mask is extended to fit with the particularities of stereo.
- Affiliations
Citations
Darazi, R. (2011). Towards a combining scheme for compression and watermarking for 3D stereo images. https://hdl.handle.net/2078.5/253548