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Published on: March 6, 2014
Watermarking of free-view video.
Alper Koz1, Cevahir Cigla, A Aydin Alatan
1Multimedia Signal Processing Group, Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, 2628 Delft, The Netherlands. A.Koz@tudelft.nl
Summary
This study introduces a novel watermarking technique for free-view TV (FTV) to protect copyrighted content. The method embeds invisible watermarks into videos, ensuring copyright protection even with arbitrary camera views generated by image-based rendering.
Area of Science:
- Computer Vision
- Digital Watermarking
- Multimedia Security
Background:
- Image-based rendering (IBR) enables realistic arbitrary view generation for applications like free-view TV (FTV).
- FTV viewers can record personalized content, raising copyright and copy protection concerns.
- Existing watermarking methods may not be suitable for the dynamic nature of IBR-generated content.
Purpose of the Study:
- To propose a robust digital watermarking method for free-view video content.
- To address copyright and copy protection challenges in FTV systems.
- To ensure watermark integrity despite arbitrary view generation via IBR.
Main Methods:
- Embedding watermarks into multiple views by exploiting human visual system's spatial masking properties.
- Developing watermark extraction techniques for arbitrarily generated virtual images.
- Analyzing watermark pattern transformations during IBR and proposing camera position/homography estimation for unknown camera parameters.
Main Results:
- Successful watermark extraction from arbitrarily generated virtual images when camera parameters are known.
- Demonstrated robustness of the watermarking method against IBR transformations.
- Proposed methods for estimating unknown virtual camera positions and homographies.
Conclusions:
- The proposed watermarking method offers a viable solution for copyright protection in FTV.
- The research opens new avenues for watermarking techniques in image-based rendering applications.
- Simulation results indicate the effectiveness and potential of the novel approach.
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