Search

Your search keyword '"Wu, Yuechu"' showing total 17 results
Start Over Author "Wu, Yuechu"
17 results on '"Wu, Yuechu"'

4. Weak Texture Information Map Guided Image Super-resolution with Deep Residual Networks

Author

Fu, Bo, Wang, Liyan, Wu, Yuechu, Wu, Yufeng, Fu, Shilin, and Ren, Yonggong

Subjects
Electrical Engineering and Systems Science - Image and Video Processing, Computer Science - Multimedia
Abstract

Single image super-resolution (SISR) is an image processing task which obtains high-resolution (HR) image from a low-resolution (LR) image. Recently, due to the capability in feature extraction, a series of deep learning methods have brought important crucial improvement for SISR. However, we observe that no matter how deeper the networks are designed, they usually do not have good generalization ability, which leads to the fact that almost all of existing SR methods have poor performances on restoration of the weak texture details. To solve these problems, we propose a weak texture information map guided image super-resolution with deep residual networks. It contains three sub-networks, one main network which extracts the main features and fuses weak texture details, another two auxiliary networks extract the weak texture details fallen in the main network. Two part of networks work cooperatively, the auxiliary networks predict and integrates week texture information into the main network, which is conducive to the main network learning more inconspicuous details. Experiments results demonstrate that our method's performs achieve the state-of-the-art quantitatively. Specifically, the image super-resolution results of our method own more weak texture details.

Published
2020

12. Current‐Induced Noise in Ocean Bottom Seismic Data: Insights From a Laboratory Water Flume Experiment.

Author

Wu, Yuechu, Yang, Ting, Liu, Dan, Dai, Yi, and An, Chao

Subjects
*FLUMES, *NOISE, *OCEAN bottom, *SURFACE waves (Seismic waves), *SEISMOMETERS, *MICROSEISMS, MARIANA Trench
Abstract

The ocean‐bottom currents are believed to be largely responsible for the high noise level in ocean bottom seismograph (OBS) data, in particular on the horizontal components. Due to the lack of in‐situ experiments and measurements, the generation mechanism and characteristics of the current‐induced noise are still poorly understood. In this paper, we designed an experiment to explore the features of current‐induced noise. A sensor module from a typical passive‐source OBS was installed in a water flume that can produce controllable steady water flows. We measured and analyzed the recorded noise with changing current velocities, with and without shielding. With other noise sources, such as infragravity waves precluded, this experiment demonstrates that the currents can generate low‐frequency noise, particularly <0.1 Hz. The noise level depends on the current velocity as well as the frequency. While the current‐induced noise affects the horizontal components significantly, its impacts on the vertical component appear negligible. The experiment shows that current‐induced noise has a dominant direction approximately perpendicular to the currents, a pattern consistent with an actual OBS on the flank of Mariana Trench, where the current direction is supposed to be along the trench. Shielding the sensor module with a plastic casing can substantially suppress the noise, indicating that shielding is a practical, low‐cost scheme to reduce the current‐induced noise. Key Points: Current‐induced noise exists in a wide frequency band; its level depends on the current velocity and the frequencyCurrent‐induced noise shows a dominant direction roughly perpendicular to currents, consistent with that at an actual ocean bottom seismograph in Mariana TrenchShielding the sensor can suppress the current‐induced noise substantially [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results