Seismic attenuation compensation with spectral-shaping regularization [PDF]
Earth and Planetary Physics, 2022 Because of the viscoelasticity of the subsurface medium, seismic waves will inherently attenuate during propagation, which lowers the resolution of the acquired seismic records.
QiZhen Du +3 more
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Single underwater image enhancement based on differential attenuation compensation
Frontiers in Marine Science, 2022 High quality underwater images and videos are important for exploitation tasks in the underwater environment, but the complexity of the underwater imaging environment makes the quality of the acquired underwater images generally low.
Yunting Lai +7 more
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IEEE Photonics Journal, 2016 We present an optimized attenuation compensation and contrast enhancement algorithm to improve the quality of the intravascular optical coherence tomography (IVOCT) images and overcome the drawbacks of the previous algorithms, including ...
Yonghan Zhou +8 more
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Strategies for attenuation compensation in neurological PET studies
NeuroImage, 2007 Molecular brain imaging using positron emission tomography (PET) has evolved into a vigorous academic field and is progressively gaining importance in the clinical arena. Significant progress has been made in the design of high-resolution three-dimensional (3-D) PET units dedicated to brain research and the development of quantitative imaging protocols
Steven Meikle +2 more
exaly +4 more sources
Research on Multi-Frequency Vibration Dynamic Compensation Scheme for Electron Beam Inspection Equipment [PDF]
MicromachinesIn the manufacturing process of advanced integrated circuits, electron beam inspection equipment is crucial for yield assurance, while vibration poses a core challenge affecting its precision and speed.
Junhai Jiang, David Wei Zhang, Ziyu Liu
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Amplitude Versus Angle (AVA) feature restoration in prestack gathers via dictionary learning. [PDF]
PLoS ONEWith the expansion of oil and gas exploration into deep and complex reservoirs, the prestack amplitude versus angle (AVA) inversion technique faces challenges due to amplitude attenuation and phase distortion caused by formation absorption effects, which
Yang Gao +5 more
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Research on Acoustic Field Correction Vector-Coherent Total Focusing Imaging Method Based on Coarse-Grained Elastic Anisotropic Material Properties [PDF]
SensorsThis study aims to address the challenges posed by uneven energy amplitude and a low signal-to-noise ratio (SNR) in the total focus imaging of coarse-crystalline elastic anisotropic materials.
Tianwei Zhao +4 more
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A New Approach for Scatter Removal and Attenuation Compensation from SPECT/CT Images [PDF]
Iranian Journal of Basic Medical Sciences, 2013 Objective(s): In SPECT, the sinogram contains scatter and lack of attenuated counts that degrade the reconstructed image quality and quantity. Many techniques for attenuation and scatter correction have been proposed.
Shabnam Oloomi +5 more
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Dizhen xuebao, 2023 为了恢复震动波能量在传播过程中产生的衰减损耗，提出基于褶积原理求取品质因子Q的方法与改进广义S变换相结合的反Q滤波法。通过震动波衰减补偿模型试验，对试验数据进行改进广义S变换的时频特性分析，得出了信号的能量分布情况以及时间频率对应关系；采用基于褶积原理求取品质因子的方法，得到时变Q值；对试验数据进行反Q滤波处理，使震动波能量得到了补偿。结果表明本文提出的反Q滤波法提高了对震动波能量衰减补偿的效果，拓宽了地震资料的频带，提高了地震资料分辨率，有利于进行高分辨率地震勘探、深部信号增强和油气藏预测工作的开展。
Baoxin Jia, Guoyu Liu, Linli Zhou
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Frequency-Domain Q-Compensated Reverse Time Migration Using a Stabilization Scheme
Remote Sensing, 2022 Seismic attenuation occurs during seismic wave propagation in a viscous medium, which will result in a poor image of subsurface structures. The attenuation compensation by directly amplifying the extrapolated wavefields may suffer from numerical ...
Xiong Ma +4 more
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