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Compressive spatial channel sounding
12th European Conference on Antennas and Propagation (EuCAP 2018), 2018In this paper we investigate the application of Compressed Sensing (CS) to MIMO channel sounding in the spatial domain. A compressive spatial channel sounder is proposed and evaluated based on real scenarios showing advantages in terms of time, hardware complexity and resolution.
M. Ibrahim +6 more
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Image compression using spatial prediction
1995 International Conference on Acoustics, Speech, and Signal Processing, 2002This paper describes a new image compression technique, referred to as spatial prediction. Spatial prediction works in a manner similar to fractal-based image compression techniques, and is in fact a result of several experiments that we conducted to gain a better understanding of why fractal compression works. Spatial prediction compresses an image by
E. Feig, H. Peterson, V. Ratnakar
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Spatial compression in ultrasound imaging
2017 51st Asilomar Conference on Signals, Systems, and Computers, 2017High quality three dimensional ultrasound imaging is typically attained by increasing the amount of sensors, resulting in complex hardware. Compressing measurements before sensing addresses this problem, and could enable new clinical applications. We have developed an analogue compression technique, by positioning a plastic coding mask in front of the ...
van der Meulen, P.Q. (author) +3 more
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Spatial implementation for compressive imaging
SPIE Proceedings, 2017Most existing works on compressive imaging require electronic devices to perform the spatial optical modulation (SOM) or sparsifying transform (ST), which increase the cost and power consumption in field application. For the implementation of compressive imaging with a cheaper cost, the sensing strategy with blocking random pulse sampling (BRPS) is ...
Senlin Yang, Xin Chong
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Spatially compressed dual-wavelength excitation Raman spectrometer
Applied Optics, 2014The design and operation of a novel dual-laser excitation Raman instrument is described. The use of two lasers of differing wavelengths allows for a Raman spectrum covering all fundamental modes of vibration to be collected while minimizing fluorescence and allowing for spatial compression of the spectrum on an imaging detector. The use of diode lasers
John B, Cooper +4 more
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An image compression method for spatial search
IEEE Transactions on Image Processing, 2000The maintenance of large raster images under spatial operations is still a major performance bottleneck. For reasons of storage space, images in a collection, such as satellite pictures in geographic information systems, are maintained in compressed form.
R, Pajarola, P, Widmayer
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Image compression using the spatial-orientation tree
1993 IEEE International Symposium on Circuits and Systems, 2002The zero-tree method for image compression, proposed by J. Shapiro (1992), is studied. The method is presented in a more general perspective, so that its characteristics can be better understood. From this analysis, an improved method is proposed, and it is shown that the new method can increase the PSNR up to 1.3 dB over the original method. >
A. Said, W.A. Pearlman
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Spectral/Spatial Hyperspectral Image Compression
2006This chapter investigates the applicability of direct application of 3D compression techniques to hyperspectral imagery and develops PCA-based spectral/spatial compression techniques in conjunction with the virtual dimensionality (VD) for hyperspectral image compression where the VD is used to estimate number of principal components required to be ...
Bharath Ramakrishna +5 more
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Spatial domain entertainment audio decompression/compression
SPIE Proceedings, 2014The ARM7 NEON processor with 128bit SIMD hardware accelerator requires a peak performance of 13.99 Mega Cycles per Second for MP3 stereo entertainment quality decoding. For similar compression bit rate, OGG and AAC is preferred over MP3. The Patent Cooperation Treaty Application dated 28/August/2012 describes an audio decompression scheme producing a ...
Y. K. Chan, Ka Him K. Tam
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Spatial-spectral hyperspectral image compressive sensing
2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017Over the last decade, the number of missions including hyperspectral cameras of increasing resolution has grown considerably. Traditional compression techniques have been proposed as an efficient way to store and transmit the ever increasing amount of hyperspectral data and to cope with the limited transmission bandwidth between the onboard systems and
Gabriel Martin, Jose M. Bioucas-Dias
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