Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Uk Lee"'
Publikováno v:
Journal of Visual Communication and Image Representation. 24:534-543
This paper proposes an efficient distributed coding system based on multiple channel division. We develop the hierarchical motion refinement scheme using DC syndrome bits to generate high quality side information (SI) for Wyner–Ziv (WZ) frames. Mor
Publikováno v:
Journal of Visual Communication and Image Representation. 20:439-449
A signal-to-noise ratio (SNR) and temporal scalable coding algorithm for 3-D mesh sequences using singular value decomposition (SVD) is proposed in this work. The proposed algorithm employs SVD to represent a mesh sequence with a small number of basi
Publikováno v:
IEEE Transactions on Consumer Electronics. 55:987-991
This paper proposes a fast and simple mapping method for lens distortion correction. Typical correction methods use a distortion model defined on distorted coordinates. They need inverse mapping for distortion correction. Inverse mapping of distortio
Autor:
Sung-Bum Park, Sang Uk Lee
Publikováno v:
IEEE Transactions on Multimedia. 11:177-183
A compact representation scheme is presented for 3-D point data. To describe underlying surface from raw point samples, we dyadically divide a 3-D domain enclosing whole points. Then, local points in each cube are approximated by a plane patch, yield
Autor:
Jae-Young Sim, Sang Uk Lee
Publikováno v:
IEEE Transactions on Multimedia. 10:305-315
In this paper, we propose adaptive and flexible quantization and compression algorithms for 3-D point data using vector quantization (VQ) and rate-distortion (R-D) optimization. The point data are composed of the position and the radius of sphere bas
Publikováno v:
IEEE Transactions on Multimedia. 8:885-895
An error resilient three-dimensional (3-D) mesh coding system is proposed in this paper. The encoder uses a shape adaptive data partitioning scheme to alleviate the effect of error propagation. An input mesh surface is coarsely divided into smooth an
Publikováno v:
IEEE Transactions on Multimedia. 7:1191-1195
We propose a lossless compression algorithm for three-dimensional point data in graphics applications. In typical point representation, each point is treated as a sphere and its geometrical and normal data are stored in the hierarchical structure of
Publikováno v:
IEEE Transactions on Circuits and Systems for Video Technology. 15:854-868
A unified approach to rate-distortion (R-D) optimized compression and view-dependent transmission of three-dimensional (3-D) normal meshes is investigated in this work. A normal mesh is partitioned into several segments, which are then encoded indepe
Publikováno v:
Journal of Visual Communication and Image Representation. 15:44-64
In this paper, we propose a progressive encoding algorithm for the geometric information of a 3D object, which is represented by binary voxels. Using the morphological pyramidal decomposition, the proposed algorithm first generates the multi-resoluti
Publikováno v:
IEEE Transactions on Circuits and Systems for Video Technology. 12:1178-1184
We propose an efficient geometry compression algorithm for three-dimensional (3-D) mesh sequences based on the two-stage vertex-wise motion vector (MV) prediction. In general, the MV of a vertex is highly correlated to those of the adjacent vertices.