Journal ArticleDOI
Overlapped block disparity compensation with adaptive windows for stereo image coding
Woontack Woo,Antonio Ortega +1 more
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TLDR
This work shows that OBM techniques can be successfully applied to stereo image coding, and takes advantage of the smoothness properties typically found in disparity fields to further improve the performance of OBM in this particular application.Abstract:
We propose a modified overlapped block-matching (OBM) scheme for stereo image coding. OBM has been used in video coding but, to the best of our knowledge, it has not been applied to stereo image coding to date. In video coding, OBM has proven useful in reducing blocking artifacts (since multiple vectors can be used for each block), while also maintaining most of the advantages of fixed-size block matching. There are two main novelties in this work. First, we show that OBM techniques can be successfully applied to stereo image coding. Second, we take advantage of the smoothness properties typically found in disparity fields to further improve the performance of OBM in this particular application. Specifically, we note that practical OBM approaches use noniterative estimation techniques, which produce lower quality estimates than iterative methods. By introducing smoothness constraints into the noniterative DV computation, we improve the quality of the estimated disparity as compared to standard noniterative OBM approaches. In addition, we propose a disparity estimation/compensation approach using adaptive windows with variable shapes, which results in a reduction in complexity. We provide experimental results that show that our proposed hybrid OBM scheme achieves a PSNR gain (about 1.5-2 dB) as compared to a simple block-based scheme, with some slight PSNR gains (about 0.2-0.5 dB) in a reduced complexity, as compared to an approach based on standard OBM with half-pixel accuracy.read more
Citations
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Patent
Overlapped Block Disparity Estimation and Compensation Architecture
TL;DR: In this paper, overlapped block disparity estimation and compensation (OBDC) is described and a variety of predictions may be used with causally-applied OBDC, where disparity compensation parameters or modes may be shared among views or layers.
Proceedings ArticleDOI
Residual image coding for stereo image compression
A. Frajka,Kenneth Zeger +1 more
TL;DR: This paper proposes a new method for the coding of residual images that takes into account the properties of residual image properties, and demonstrates that it is possible to achieve good results with a computationally simple method.
Journal ArticleDOI
Stereo image compression using wavelet coefficients morphology
J. N. Ellinas,M.S. Sangriotis +1 more
TL;DR: A new stereo image compression scheme that is based on the wavelet transform of both images and the disparity estimation between the stereo pair subbands and demonstrates very good performance as far as PSNR measures and visual quality are concerned and low complexity.
Journal ArticleDOI
Vector Lifting Schemes for Stereo Image Coding
TL;DR: A novel approach, based on vector lifting schemes (VLS), which offers the advantage of generating two compact multiresolution representations of the left and the right views is proposed, which indicates a significant improvement using the proposed structures compared with conventional methods.
Journal ArticleDOI
Multiview Image Coding Based on Geometric Prediction
TL;DR: A geometric prediction methodology for accurate disparity vector (DV) prediction, such that it can largely reduce the disparity compensation cost, and a basic framework that can be implemented in most existing multiview image/video coding schemes.
References
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Journal ArticleDOI
Displacement Measurement and Its Application in Interframe Image Coding
TL;DR: The motion compensation is applied for analysis and design of a hybrid coding scheme and the results show a factor of two gain at low bit rates.
Journal ArticleDOI
Overlapped block motion compensation: an estimation-theoretic approach
TL;DR: This analysis establishes for the first time how (and why) OBMC can offer substantial reductions in prediction error as well, even with no change in the encoder's search and no extra side information.
Journal ArticleDOI
Motion-compensating prediction with fractional-pel accuracy
TL;DR: A three-state technique for reliable displacement estimation with fractional-pel accuracy is introduced, based on phase correlation, and for motion-compensation with block size of 16 pels*16 pels, 1/4- Pel accuracy appears to be sufficient for broadcast TV signals, whereas for videophone signals,1/2-pel Accuracy is desirable.
Journal ArticleDOI
Data compression of stereopairs
TL;DR: It is proved that the rate distortion limit for coding stereopairs cannot in general be achieved by a coder that first codes and decodes the right picture sequence independently of the left picture sequence, and then codes anddecodes theleft picture sequence given the decoded right picture sequences.