Results 221 to 230 of about 2,273,192 (285)

Edge-Oriented Uniform Intra Prediction

IEEE Transactions on Image Processing, 2008
We propose an intra prediction solution to block-based image compression. In order to adapt to local image features during intra prediction, we consider the distinct image singularities within the model of piece-wise smooth functions. With such singularities, i.e., edges in this paper, intra prediction can be performed by solving Laplace equations ...
Dong Liu, Ya-Qin Zhang
exaly   +3 more sources

Transforms for Intra Prediction Residuals Based on Prediction Inaccuracy Modeling [PDF]

IEEE Transactions on Image Processing, 2015
In intra video coding and image coding, the directional intra prediction is used to reduce spatial redundancy. Intra prediction residuals are encoded with transforms.
Jae Soo Lim
exaly   +2 more sources

Intra Prediction by Template Matching

2006 International Conference on Image Processing, 2006
Intra prediction is an effective method for reducing the coded information of an image or an intra frame within a video sequence. The conventional method today is to create a sample predictor block by extrapolating the reconstructed pixels surrounding the target block to be coded.
Thiow Keng Tan, Choong Seng Boon, Yoshinori Suzuki   +2 more
openaire   +2 more sources

Novel intra prediction via position-dependent filtering

Journal of Visual Communication and Image Representation, 2011
This paper presents a novel intra prediction algorithm, named position-dependent filtering (PDF), to improve the intra prediction accuracy. Different from the existing schemes where the samples along one prediction direction are predicted with the same ...
Siwei Ma
exaly   +2 more sources

Intra-predictive transforms for image coding

2009 IEEE International Symposium on Circuits and Systems, 2009
This paper presents a new transform framework, intra-predictive transforms, for block-based image coding. The proposed framework unifies cross-block prediction and transforms within a block. Thus, it can exploit both the intra- and inter- block correlations.
Jizheng Xu, Feng Wu 0001, Wenjun Zhang 0001   +2 more
openaire   +1 more source

Secondary Intra Prediction Scheme for HEVC

2020 Data Compression Conference (DCC), 2020
Conventional intra prediction usually utilizes the top and left reconstructed reference samples of the current block to generate prediction pixels. However, with the distance between reference samples and the predicting pixel increasing, the correlation of them becomes weaker. The loss of the bottom-right corner of the current block is bigger than that
Junhui Liang, Yamei Chen, Hongkui Wang, Hailang Yang, Li Yu 0003   +4 more
openaire   +1 more source

On secondary transforms for intra prediction residual

2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012
In this paper, we present a secondary transform that is applied in a codec after the conventional DCT for all the video-coding intra prediction modes. Our approach is applicable to any block-based intra prediction scheme that employs transforms along the horizontal and vertical direction separably.
Ankur Saxena, Felix C. A. Fernandes
openaire   +1 more source

Intra-prediction Techniques

2016
In this chapter, the very basic introduction about video compression theory is introduced. In this context, different redundancies which are generally exploited in video compression are discussed in detail. After that, the hybrid video codec is explained in brief.
Byung-Gyu Kim, Kalyan Goswami
openaire   +1 more source

Parallel intra prediction for video coding

28th Picture Coding Symposium, 2010
In this paper, we propose an intra-prediction system that is both parallel friendly and with high coding efficiency. This is achieved by combining a novel prediction strategy that reduces serial dependencies and a novel, multi-directional and adaptive prediction system.
C. Andrew Segall, Jie Zhao 0007, Tomoyuki Yamamoto   +2 more
openaire   +1 more source

On the coding gain of intra-predictive transforms

2009 16th IEEE International Conference on Image Processing (ICIP), 2009
Intra-predictive transforms are a kind of block-based transforms that can exploit both the intra- and inter-block correlations. This paper analyzes the coding gains of intra-predictive transforms for the Gaussian process. The tight upper bound of the coding gain is derived, which is shown to be better than both the discrete cosine transform and the ...
Jizheng Xu, Feng Wu 0001, Wenjun Zhang 0001   +2 more
openaire   +1 more source