Results 341 to 350 of about 1,515,695 (366)

Signal to Noise Ratio

Critical Reviews in Diagnostic Imaging, 2001
Robert C. Lange, Robert C. Smith
openaire   +3 more sources

VSNR: A Wavelet-Based Visual Signal-to-Noise Ratio for Natural Images

IEEE Transactions on Image Processing, 2007
D. Chandler, S. Hemami
semanticscholar   +1 more source

On Signal-to-Noise Ratios in Communication Systems

IEEE Transactions on Communication Technology, 1966
Viterbi (1964) has given ratios (SNRs) after demodulation in digital lower bounds on maximum signal-to-noise communication systems. He computes the SNRs according to Yates-Fish and Fitch, and Mayer (his references [7] and [8]), namely, the signal energy as the variance of the signal in the absence of channel noise; the noise energy as the variance of ...
openaire   +2 more sources

Factors Affecting the Signal-to-Noise Ratio

2003
Up to now we have dealt with the generation of the MR signal and how these signals can be utilised to create an image. We have disregarded, however, the fact that the MR signal can be disturbed by a feature called “noise”. The following factors contribute to image noise: Imperfections in the MR system, due to e.g.: inhomogeneities of the magnetic
Dominik Weishaupt, Victor D. Köchli, Borut Marincek   +2 more
openaire   +2 more sources

Dramatically Enhanced Mechanosensitivity and Signal‐to‐Noise Ratio of Nanoscale Crack‐Based Sensors: Effect of Crack Depth

Advances in Materials, 2016
Byeonghak Park, Jisun Kim, Daeshik Kang, Chanho Jeong, Kwang Su Kim, Jong Uk Kim, P. Yoo, Tae‐il Kim   +7 more
semanticscholar   +1 more source

SIGNAL‐TO‐NOISE RATIO AND RECORD QUALITY

GEOPHYSICS, 1964
The appearance of a seismic record is a function of the signal‐to‐noise ratio. This ratio is expressed quantitatively, but it can not be measured on the record. The quality of the record is expressed by the lineup of events and constancy of character across the record, but is generally not expressed numerically.
openaire   +2 more sources

Signal-to-Noise Ratio Enhancement Techniques

2009
In this chapter, techniques to improve spectral SNR of measurements using an FT spectrometer are discussed. In attempting to improve spectral SNR, first it is important to recognize the limiting source of noise and error. In this chapter, some of the dominant sources of error are identified by analyzing the characteristics of the output spectra through
openaire   +2 more sources

The intrinsic signal‐to‐noise ratio in NMR imaging

Magnetic Resonance in Medicine, 1986
W. Edelstein, G. Glover, C. Hardy, R. Redington   +3 more
semanticscholar   +1 more source

Signal-to-Noise Ratio of Image Devices

1960
Publisher Summary This chapter discusses the signal-to-noise ratio of image devices. In an X-ray image intensifier, the X-rays are absorbed in a fluorescent screen that converts the X-rays into light. The light quanta excite the photocathode, which is deposited upon the fluorescent material. In such cases, therefore, an image represented by X-rays is
openaire   +2 more sources

Genes, dopamine and cortical signal-to-noise ratio in schizophrenia

Trends in Neurosciences, 2004
G. Winterer, D. Weinberger
semanticscholar   +1 more source