Journal ArticleDOI
Hiding depth information in compressed 2D image/video using reversible watermarking
Wenyi Wang,Jiying Zhao +1 more
TLDR
A novel joint coding scheme is proposed for 3D media content including stereo images and multiview-plus-depth (MVD) video for the purpose of depth information hiding by a reversible watermarking algorithm called Quantized DCT Expansion (QDCTE).Abstract:
In this paper, a novel joint coding scheme is proposed for 3D media content including stereo images and multiview-plus-depth (MVD) video for the purpose of depth information hiding. The depth information is an image or image channel which reveals the distance of scene objects' surfaces from a viewpoint. With the concern of copyright protection, access control and coding efficiency for 3D content, we propose to hide the depth information into the texture image/video by a reversible watermarking algorithm called Quantized DCT Expansion (QDCTE). Considering the crucial importance of depth information for depth-image-based rendering (DIBR), full resolution depth image/video is compressed and embedded into the texture image/video, and it can be extracted without extra quality degradation other than compression itself. The reversibility of the proposed algorithm guarantees that texture image/video quality will not suffer from the watermarking process even if high payload (i.e. depth information) is embedded into the cover image/video. In order to control the size increase of watermarked image/video, the embedding function is carefully selected and the entropy coding process is also customized according to watermarking strength. Huffman and content-adaptive variable-length coding (CAVLC), which are respectively used for JPEG image and H.264 video entropy encoding, are analyzed and customized. After depth information embedding, we propose a new method to update the entropy codeword table with high efficiency and low computational complexity according to watermark embedding strength. By using our proposed coding scheme, the depth information can be hidden into the compressed texture image/video with little bitstream size overhead while the quality degradation of original cover image/video from watermarking can be completely removed at the receiver side.read more
Citations
More filters
IST project ATTEST - an evolutionary and optimised approach on 3D-TV
Christoph Fehn,Peter Kauff,M Op de Beeck,F Ernst,WA Wijnand IJsselsteijn,Marc Pollefeys,Luc Van Gool,Eyal Ofek,Ian Sexton +8 more
TL;DR: In this article, the authors present a system that allows for an evolutionary introduction of depth perception into the existing 2D digital TV framework, where all parts of the 3D processing chain are optimized to one another.
Journal ArticleDOI
On Computational Aspects of Tchebichef Polynomials for Higher Polynomial Order
Sadiq H. Abdulhussain,Abd Rahman Ramli,Syed Abdul Rahman Al-Haddad,Basheera M. Mahmmod,Wissam A. Jassim +4 more
TL;DR: The proposed algorithm makes the computation of the TP superior to that of conventional recurrence algorithms when the polynomial order is large and also accelerates the computational speed of the TPCs.
Journal ArticleDOI
Signal compression and enhancement using a new orthogonal-polynomial-based discrete transform
Basheera M. Mahmmod,Abd Rahman Ramli,Sadiq H. Abdulhussain,Syed Abdul Rahman Al-Haddad,Wissam A. Jassim +4 more
TL;DR: Experimental tests show that DKTT exhibited remarkable achievements and excellent results in signal compression and speech enhancement, and can be considered as a new set of orthogonal functions for futuristic applications of signal processing.
Journal ArticleDOI
Reliable Recurrence Algorithm for High-Order Krawtchouk Polynomials
Khaled A. Al-Utaibi,Sadiq H. Abdulhussain,Basheera M. Mahmmod,Marwah Abdulrazzaq Naser,Muntadher Alsabah,Sadiq M. Sait +5 more
TL;DR: In this article, a new diagonal recurrence relation was introduced and used in the proposed algorithm to compute the coefficients of KPs in high orders, which can generate polynomials of an order ∼8.5 times larger than those generated using state-of-the-art algorithms.
Journal ArticleDOI
Chaotic Reversible Watermarking Method Based on IWT with Tamper Detection for Transferring Electronic Health Record
Mahboubeh Nazari,Arash Maneshi +1 more
TL;DR: In this paper, a secure, lightweight, reversible, and high capacity watermarking algorithm with tamper detection capability is proposed for IoT-based healthcare systems, which has applied Integer Wavelet Transform (IWT) and chaotic map for efficiency and increasing security.
References
More filters
Book
The Mathematical Theory of Communication
TL;DR: The Mathematical Theory of Communication (MTOC) as discussed by the authors was originally published as a paper on communication theory more than fifty years ago and has since gone through four hardcover and sixteen paperback printings.
Journal ArticleDOI
A taxonomy and evaluation of dense two-frame stereo correspondence algorithms
TL;DR: This paper has designed a stand-alone, flexible C++ implementation that enables the evaluation of individual components and that can easily be extended to include new algorithms.
Book
Digital Watermarking
TL;DR: Digital Watermarking covers the crucial research findings in the field and explains the principles underlying digital watermarking technologies, describes the requirements that have given rise to them, and discusses the diverse ends to which these technologies are being applied.
Journal ArticleDOI
Reversible data embedding using a difference expansion
TL;DR: The redundancy in digital images is explored to achieve very high embedding capacity, and keep the distortion low, in a novel reversible data-embedding method for digital images.