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MSF-DETR: A small target detection algorithm for sonar images based on spatial-frequency domain collaborative feature fusion. [PDF]

PLoS One
Zhao H, Han S, Geng J, Han Y, Jia S, Li K.   +5 more
europepmc   +1 more source

Hybrid channel attention network for auditory attention detection. [PDF]

Sci Rep
Wen Y, Ma S, Liu C, Wang Y.
europepmc   +1 more source

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Reverberation Clutter Suppression Using 2-D Spatial Coherence Analysis

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2022
Diffuse reverberation clutter often significantly degrades the visibility of abdominal structures. Reverberation clutter acts as a temporally stationary haze that originates from the multiple scattering within the subcutaneous layers and has a narrow spatial correlation length.
Rifat Ahmed, Nick Bottenus, James Long, Gregg E. Trahey   +3 more
openaire   +2 more sources

Blind single-channel suppression of late reverberation based on perceptual reverberation modeling

The Journal of the Acoustical Society of America, 2011
A blind method for suppressing late reverberation from speech and audio signals is presented. The proposed technique operates both on the spectral and on the sub-band domains employing a single input channel. At first, a preliminary rough clean signal estimation is required and for this, any standard technique may be applied; however here the estimate ...
Alexandros, Tsilfidis, John, Mourjopoulos   +1 more
openaire   +2 more sources

Space-time ODN suppressing reverberation method

2008 9th International Conference on Signal Processing, 2008
Reverberation of active sonar that resemble clutter of airborne radar has space-time coupling characteristic. Based on which, a method of space-time ODN reverberation is presented in this paper. Project matrix method is utilized to design time and space ODN filters.
null Zhan Haoke, null Cai Zhiming, null Yuan Bingcheng   +2 more
openaire   +1 more source

Sand dune reverberation and its suppression

The Leading Edge, 1998
When conducting seismic exploration in desert areas, we find a strong reverberation between the sand dune surface and the desert floor — a similar situation occurs between the water surface and the sea floor. The reverberation as noise in onshore seismic prospecting is ignored for it does not behave regularly as in offshore cases.
Yun Ling, Jun Gao, Rujie Zhang
openaire   +1 more source

Geometric comb waveforms for reverberation suppression

Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers, 2002
The major problem for sonar systems operating in shallow water is reverberation from the ocean bottom. A new class of waveforms is described which combines high range resolution with excellent Doppler properties for detecting moving targets in stationary reverberation. The waveforms consist of multiple simultaneously transmitted CW tone pulses.
H. Cox, null Hung Lai
openaire   +1 more source

Adaptive reverberation noise delay estimation for reverberation suppression in dual band ultrasound imaging

The Journal of the Acoustical Society of America, 2015
The behavior of the propagation delays introduced in dual frequency band ultrasound imaging is discussed. In particular, the delay of reverberation noise components is examined. Using a delay corrected subtraction (DCS) method, it is possible to suppress the reverberation noise if the behavior of the propagation delays is known. Here, a signal adaptive
Ole Martin, Brende, Bjørn, Angelsen
openaire   +2 more sources