Results 41 to 50 of about 91,646,978 (197)

Peak-to-average power ratio of a Zipper signal [PDF]

open access: yes, 2001
We investigate the peak-to-average power ratio (PAR) and its effects on the performance of Zipper-VDSL systems. The spectrum and the out of band power when passing through a nonlinear device is also investigated.
Jayalath, Dhammika, Tellambura, Chintha
core   +1 more source

Infrared–Visible Image Fusion via Cross-Modal Guided Dual-Branch Networks

open access: yesApplied Sciences
In the field of low-altitude aerial drone data fusion, the fusion of infrared and visible light images remains challenging due to issues such as large modal differences, insufficient cross-modal alignment, and limited global context modeling. Traditional
Tingyu Zhu, Jinyong Chen, Gang Wang
doaj   +1 more source

Apply wavelet packet soft threshold noise reduction method to aviation gamma energy spectrum

open access: yesHe jishu, 2022
BackgroundWith the continuous development of nuclear technology, radioactive material exploration requires higher and higher detection accuracy of aerial gamma energy spectrometer, meanwhile, the wavelet packet soft threshold noise reduction method has ...
ZHANG Song   +7 more
doaj   +1 more source

Signal-to-noise ratio is improved by combining tellurium channels.

open access: yes, 2019
(a) Combination of 125Te, 126Te, 128Te, and 130Te images. The signal and noise regions are defined arbitrarily based on knowledge of the tissue of interest. Single isotope images may have either low signal (e.g. 125Te) or high noise (e.g. 130Te).
Jay Bassan (7339763), Mark Nitz (208005)
core   +1 more source

A Secure Medical Image Transmission System Based On 2D Logistic Map and Diffie-Hellman Key Exchange Mechanisms

open access: yesUHD Journal of Science and Technology, 2022
With the tremendous growth of searchable visual media, the content-based medical image retrieval and computer-aided diagnosis systems have become popular in recent years to improve knowledge and provide facilities for radiologists.
Shakhawan H. Wady, Raghad Z. Yousif
doaj   +1 more source

Signal-to-noise ratios in recorded patterned media [PDF]

open access: yes, 2003
The replay flux from isolated and sequences of recorded patterned elements was analysed and analytical expressions for the replay spectra were derived.
Mustafa M. Aziz (21814232)   +2 more
core   +5 more sources

Steganography in RGB Images Using Adjacent Mean

open access: yesIEEE Access, 2021
Steganography is the practice of hiding information or data in a seemingly innocuous cover medium, such as message, file, image, audio, and video. In the past decades, many approaches of steganography in images were proposed for various applications.
Yun-Hsin Chuang   +3 more
doaj   +1 more source

Performance of peak signal‐to‐noise ratio quality assessment in video streaming with packet losses

open access: yesElectronics Letters, 2016
The effect of packet losses over error‐prone networks on visual quality of distributed video contents, estimated through subjective opinion and PSNR as an objective measure is analysed. It is shown that, within a fixed content, the variation of PSNR is a reliable indicator of the variation of packet loss rates.
B.P. Bondzulic   +3 more
openaire   +1 more source

Laser Diode based THz-TDS System with 133 dB peak Signal-to-Noise Ratio

open access: yes, 2023
Abstract Terahertz time-domain spectroscopy (THz-TDS) has emerged as a powerful and versatile tool in various scientific fields. These include – among others – imaging, material characterization, and layer thickness measurements. While THz-TDS has achieved significant success in research environments, the high cost and bulky nature of most ...
Vladyslav Cherniak   +3 more
openaire   +1 more source

Robust Algorithm for Aerial Video Stabilization of UAV Based onCamera Motion Trajectory [PDF]

open access: yesZhengzhou Daxue xuebao. Gongxue ban
Aiming at the problem of high altitude turbulence environment to the time-delay stable image acquisitionof UAV, an anti-shaking algorithm for aerial video was proposed for hovering shooting and moving shooting.
YU Songsen   +3 more
doaj   +1 more source

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