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Current light field compression techniques lack robustness to handle both rate-distortion optimized motion compensation as well as latency during the encoding and decoding process. This paper focuses on a contribution approach that uses advanced frame prediction with affine and translational motion models and optimized view prediction structures. This method allows a significant compression performance...
In this paper, we present a novel pseudo sequence based 2-D hierarchical reference structure for light-field image compression. In the proposed scheme, we first decompose the light-field image into multiple views and organize them into a 2-D coding structure according to the spatial coordinates of the corresponding microlens. Then we mainly develop three technologies to optimize the 2-D coding structure...
We propose a pseudo-sequence-based scheme for light field image compression. In our scheme, the raw image captured by a light field camera is decomposed into multiple views according to the lenslet array of that camera. These views constitute a pseudo sequence like video, and the redundancy between views is exploited by a video encoder. The specific coding order of views, prediction structure, and...
Rate control is a useful tool for video coding, especially in real-time communication applications. Most of existing rate control algorithms are based on the \(R-Q\) model, which characterizes the relationship between bitrate \(R\) and quantization \(Q\) , under the assumption that \(Q\) is the critical factor on rate control. However, with the video coding schemes becoming more and more flexible,...
In this paper, an improved lossless intra prediction algorithm based on H.264/AVC framework is proposed. In the new algorithm, samples in a macroblock/block are hierarchically predicted, instead of using a block-based prediction as a whole. More specifically, four groups are extracted from the samples in the MB/block. Samples in the first group are firstly predicted based on directional intra prediction...
With high compression ratio performance, fractal image compression technology becomes a hot topic of research of image compression techniques. However, the encoding time of traditional fractal compression technique is too long to achieve real-time image compression, so it cannot be widely used. Based on the theory of fractal image compression; this paper raised an improved algorithm form the aspect...
The lack of directional selectivity has harmed the performance of traditional discrete wavelet transform based image coding, especially when the original image includes multidirectional textures. To offer a better compression ability for multidirectional textural images, a novel wavelet image coding scheme, called dual x-tree wavelet image coding is proposed in this paper. First, the 2-D dual-tree...
EZW takes equal important code for all frequencies, so it can't make use of the characteristics of the wavelet's coefficient completely. The coding time is too long and the coding efficiency is low during the process of gradually approximating and quantizing, so we put forward the separate-frequency EZW. This algorithm codes the high and low frequencies of wavelet image respectively. And the results...
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