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Variable Compression Ratio Engines
SAE Technical Paper Series, 2009 <div class="htmlview paragraph">The main focus of this work is to study variable compression ratio engines. The study begins with an analyze of the benefits of a variable compression ratio for Otto Cycle engines including mechanisms that already exist, the usual constructive solutions and the project criteria adopted in the area.</div> < ...
Maurilio De Bortoli Cassiani +3 more
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High compression ratio image compression
1993 IEEE International Symposium on Circuits and Systems, 2002An image compression method is proposed. It makes use of the wavelet transform (WT) with better frequency localization and the adaptive hierarchical vector quantization (AHVQ) technique. The WT provides a multifrequency channel representation for the image from which proper coding methods can be drawn.
Sheng Zhong, Qing-Yun Shi, Min-Teh Cheng
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Compression ratio boundaries for predictive signal compression
IEEE Transactions on Image Processing, 2001Predictive regressional models like DPCM are widely used in digital signal compression. This paper analyzes the relationship that exists between the predictive model fitness and the resultant reduction of the first-order signal entropy, and finds the lossless compression ratio C as a function of predictive model correlation rho.
Oleg S. Pianykh, John M. Tyler
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Compression Ratio Design in Compressive Spectral Imaging
2016 Data Compression Conference (DCC), 2016In this work, a compression strategy for Focal Plane Array Measurements (FPA_M) in Compressive Spectral Imaging (CSI) is presented. The strategy is applied to four CSI architectures. The implementation consists of two stages: transformation and coding. The transformation stage is performed according to the FPA_M structure. Finally, an arithmetic coding
Jeison Marin +2 more
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Compression ratio prediction in lossy compression of noisy images
2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015Our paper addresses a question of prediction compression ratio in lossy compression of remote sensing images by coders based on discrete cosine transform (DCT) taking into account noise present in these images. Quantization step is set fixed and proportional to noise standard deviation to provide compression in optimal operation point if it exists ...
Alexander N. Zemliachenko +4 more
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Compression Theorems and Steiner Ratios on Spheres
Journal of Combinatorial Optimization, 1997zbMATH Open Web Interface contents unavailable due to conflicting licenses.
J. Hyam Rubinstein, Jia F. Weng
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Improving Compression Ratio in CASSI
OSA Imaging and Applied Optics Congress 2021 (3D, COSI, DH, ISA, pcAOP), 2021We propose a new approach to improve the compression ratio in CASSI while maintaining the simplicity of the system and single-snapshot acquisition. We evaluate simulations of the modified method, which confirm the reconstruction quality improvement.
J. Hlubuček, J. Lukeš, K. Žídek
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Compression-ratio-based seizure detection
2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2013For wireless seizure monitoring devices seizure detection and data compression are two critical tasks that need to be carefully designed against a very tight power budget to maximize the battery life. These two tasks are usually considered separately and algorithms for each are developed separately.
Chung-Lin Sha +3 more
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