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Depth Coding Using a Boundary Reconstruction Filter for 3-D Video Systems
Kwan-Jung Oh,Vetro, A,Yo-Sung Ho IEEE 2011 IEEE transactions on circuits and systems for vide Vol.21 No.3
<P>A depth image is 3-D information used for virtual view synthesis in 3-D video system. In depth coding, the object boundaries are hard to compress and severely affect the rendering quality since they are sensitive to coding errors. In this paper, we propose a depth boundary reconstruction filter and utilize it as an in-loop filter to code the depth video. The proposed depth boundary reconstruction filter is designed considering occurrence frequency, similarity, and closeness of pixels. Experimental results demonstrate that the proposed depth boundary reconstruction filter is useful for efficient depth coding as well as high-quality 3-D rendering.</P>
Depth reconstruction filter for depth coding
Oh, K.-J.,Yea, S.,Vetro, A.,Ho, Y.-S. IET 2009 Electronics letters Vol.45 No.6
<P>Depth images represent the distances of scene elements from a camera in 3D space; their efficient coding is crucial for emerging applications such as free-viewpoint TV and 3D video. An in-loop reconstruction filter that improves the depth-coding performance as well as the rendering quality of virtual views based upon the coded depth is proposed.</P>
Depth Reconstruction Filter and Down/Up Sampling for Depth Coding in 3-D Video
Kwan-Jung Oh,Sehoon Yea,Vetro, A.,Yo-Sung Ho IEEE 2009 IEEE signal processing letters Vol.16 No.9
<P>A depth image represents three-dimensional (3-D) scene information and is commonly used for depth image-based rendering (DIBR) to support 3-D video and free-viewpoint video applications. The virtual view is generally rendered by the DIBR technique and its quality depends highly on the quality of depth image. Thus, efficient depth coding is crucial to realize the 3-D video system. In this letter, we propose a depth reconstruction filter and depth down/up sampling techniques to improve depth coding performance. Experimental results demonstrate that the proposed methods reduce the bit-rate for depth coding and achieve better rendering quality.</P>
Random Stability of an Additive-Quadratic-Quartic Functional Equation
Mohamadi, M.,Cho, Y. J.,Park, C.,Vetro, P.,Saadati, R. Hindawi Publishing Corporation 2010 Journal of inequalities and applications Vol.2010 No.1
<P>Using the fixed point method, we prove the generalized Hyers-Ulam stability of the following additive-quadratic-quartic functional equation f(x+2y)+f(x-2y)=2f(x+y)+2f(-x-y)+2f(x-y)+2f(y-x)-4f(-x)-2f(x)+f(2y)+f(-2y)-4f(y)-4f(-y) in complete random normed spaces.</P>