Results 271 to 280 of about 4,167,463 (302)

Efficient computation of compressible flows

2008
Recent progress in the development of robust and accurate discretization methods for the compressible flow equations is presented. Numerical dissipation schemes that are based upon the gradients in state and flux vectors are particularily promising because they are readily used with a variety of time-stepping schemes and preconditioning.
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Efficient Compression of SIDH Public Keys

2017
Supersingular isogeny Diffie-Hellman (SIDH) is an attractive candidate for post-quantum key exchange, in large part due to its relatively small public key sizes. A recent paper by Azarderakhsh, Jao, Kalach, Koziel and Leonardi showed that the public keys defined in Jao and De Feo’s original SIDH scheme can be further compressed by around a factor of ...
Craig Costello, David Jao, Patrick Longa, Michael Naehrig, Joost Renes, David Urbanik   +5 more
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Efficient two-dimensional compressed matching

Data Compression Conference, 1992., 2003
Digitized images are known to be extremely space consuming. However, regularities in the images can often be exploited to reduce the necessary storage area. Thus, many systems store images in a compressed form. The authors propose that compression be used as a time saving tool, in addition to its traditional role of space saving.
Amihood Amir, Gary Benson
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An efficient strategy for compressive SAR imaging

2015 IEEE China Summit and International Conference on Signal and Information Processing (ChinaSIP), 2015
In conventional CS-based SAR imaging scheme, the two-dimensional (2-D) scene is vectorized into a long vector, and the physical observation mechanism is represented by a high dimensional matrix. When the scene size increases, the dimensionality of the observation matrix, the computation complexity and the reconstruction time grow tremendously. To solve
Guanghui Zhao 0003, Gongyu Zuo, Fangfang Shen, Guangming Shi   +3 more
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Efficient computation of compressible and incompressible flows

Journal of Computational Physics, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Efficiency of lossless data compression

2011
Data compression is important part of information and communication technologies. There are many benefits from using data compression, like saving space on hard drives or lowering use of transmission bandwidth in the network. There are also many algorithms and many tools that are used today in this field.
Kudelić, Robert, Lovrenčić, Alen, Konecki, Mladen   +2 more
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Simple and efficient wavelet image compression

Proceedings 2000 International Conference on Image Processing (Cat. No.00CH37101), 2002
We propose a simple but efficient wavelet image compression algorithm. The proposed coding scheme employs the multi-level dyadic wavelet decomposition, linear quantization with a proper dead zone, 1-D addressing complexity by raster scanning within subbands, variable length block coding, small alphabet representation of 1-D integer sequences, and ...
Tian-Hu Yu, Zhihai He, Sanjit K. Mitra
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On the design of an efficient encryption-then-compression system

2013 IEEE International Conference on Acoustics, Speech and Signal Processing, 2013
In many practical scenarios, image encryption has to be conducted prior to image compression. This has led to the problem of how to design a pair of encryption and compression algorithms such that compressing the encrypted image can still be efficiently performed.
Jiantao Zhou 0001, Xianming Liu 0005, Oscar C. Au   +2 more
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Efficient index compression in DB2 LUW

Proceedings of the VLDB Endowment, 2009
In database systems, the cost of data storage and retrieval are important components of the total cost and response time of the system. A popular mechanism to reduce the storage footprint is by compressing the data residing in tables and indexes. Compressing indexes efficiently, while maintaining response time requirements, is known to be challenging ...
Bishwaranjan Bhattacharjee, Lipyeow Lim, Timothy Malkemus, George A. Mihaila, Kenneth A. Ross, Sherman Lau, Cathy McCarthur, Zoltan Toth, Reza Sherkat   +8 more
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Adaptive HEVC Steganography Based on Steganographic Compression Efficiency Degradation Model

IEEE Transactions on Dependable and Secure Computing, 2023
Zhaohong Li, Tanfeng Sun, Xinghao Jiang
exaly