In this paper, we propose a new method for estimating sub-pixel motion via exploiting the principle of phase correlation in the Fourier domain. The method is based on linear weighting of the height of the main peak on the one hand and the difference between its two neighboring side-peaks on the other. Using both synthetic and real data we show that the proposed method outperforms many established approaches and achieves improved accuracy even in the presence of noisy samples.
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http://dx.doi.org/10.1109/TIP.2009.2039056 | DOI Listing |
Phys Med Biol
December 2024
Department of Biomedical Engineering, Eindhoven University of Technology, Postbus 513, The Netherlands, Eindhoven, 5600 MB, NETHERLANDS.
This study demonstrates high volume rate bistatic 3-D vascular strain imaging, to overcome well-known challenges caused by the anisotropic resolution and contrast inherent to ultrasound imaging. Approach. Using two synchronized 32x32 element matrix arrays (3.
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August 2024
The Seventh Engineering Co., Ltd. of CFHEC, Zhengzhou, China.
As the primary variable load of bridges, vehicle load is an important parameter for bridge health monitoring. However, traditional Weigh-in-Motion (WIM) systems and the commonly used method of placing sensors on the bridge are challenging to apply in load monitoring for many small and medium-sized bridges. Therefore, this paper proposes a bridge vehicle load identification method based on traffic surveillance video data.
View Article and Find Full Text PDFSensors (Basel)
July 2024
College of Engineering, Anhui Agricultural University, Hefei 230036, China.
As a non-contact method, vision-based measurement for vibration extraction and modal parameter identification has attracted much attention. In most cases, artificial textures are crucial elements for visual tracking, and this feature limits the application of vision-based vibration measurement on textureless targets. As a computation technique for visualizing subtle variations in videos, the video magnification technique can analyze modal responses and visualize modal shapes, but the efficiency is low, and the processing results contain clipping artifacts.
View Article and Find Full Text PDFFront Robot AI
June 2024
School of Computing and Built Environment, Mechanical Engineering Department, Glasgow Caledonian University, Glasgow, United Kingdom.
Robotics uptake in the aerospace industry is low, mainly due to the low-volume/high-accuracy production that aerospace manufacturers require. Furthermore, aerospace manufacturing and assembly sites are often unstructured environments not specifically suitable for robots to operate in. This paper introduces a robotic visual inspection system using off-the-shelf components able to inspect the mounting holes for wing slat actuators without the need for fixed-coordinate programming; the part just needs to be left within reach of the robot.
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April 2024
Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
Room temperature semiconductor radiation detectors (RTSD) for X-ray and -ray detection are vital tools for medical imaging, astrophysics and other applications. CdZnTe (CZT) has been the main RTSD for more than three decades with desired detection properties. In a typical pixelated configuration, CZT have electrodes on opposite ends.
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