Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Light Field Compression with Disparity Guided Sparse Coding based on
  Structural Key Views   Recent imaging technologies are rapidly evolving for sampling richer and more
immersive representations of the 3D world. And one of the emerging technologies
are light field (LF) cameras based on micro-lens arrays. To record the
directional information of the light rays, a much larger storage space and
transmission bandwidth are required by a LF image as compared with a
conventional 2D image of similar spatial dimension, and the compression of LF
data becomes a vital part of its application.
  In this paper, we propose a LF codec that fully exploits the intrinsic
geometry between the LF sub-views by first approximating the LF with disparity
guided sparse coding over a perspective shifted light field dictionary. The
sparse coding is only based on several optimized Structural Key Views (SKV);
however the entire LF can be recovered from the coding coefficients. By keeping
the approximation identical between encoder and decoder, only the residuals of
the non-key views, disparity map and the SKVs need to be compressed into the
bit stream. An optimized SKV selection method is proposed such that most LF
spatial information could be preserved. And to achieve optimum dictionary
efficiency, the LF is divided into several Coding Regions (CR), over which the
reconstruction works individually. Experiments and comparisons have been
carried out over benchmark LF dataset, which show that the proposed SC-SKV
codec produces convincing compression results in terms of both rate-distortion
performance and visual quality compared with High Efficiency Video Coding
(HEVC): with 47.87% BD-rate reduction and 1.59 dB BD-PSNR improvement achieved
on average, especially with up to 4 dB improvement for low bit rate scenarios.

22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat