نتایج جستجو برای: artifact reduction

تعداد نتایج: 509211  

Journal: :Computational and Mathematical Methods in Medicine 2011

Journal: :IEEE Access 2023

Helical computed tomography (CT) scans are often performed to obtain three-dimensional images of an object that is longer than the detector. However, existing quasi-exact and exact reconstruction methods, such as re-binning Katsevich algorithm, generate interpolation errors or require high computational power. In this work, we propose a method reconstruct helical CT projections by iteratively r...

2009
Benjamin Wood Lallit Anand Terry P. Orlando Levi Benjamin Wood

The photoplethysmogram (PPG) is an extremely useful wearable sensing medical diagnostic tool. However, the PPG signal becomes highly corrupted when the wearer is in motion, rendering the measured signal useless. This thesis develops an adaptive motion artifact reduction scheme to recover the underlying physiologic information from the corrupted signal using a collocated accelerometer as a motio...

2003
Yibin Yang Lilla Böröczky

A joint approach of resolution enhancement and artifact reduction for MPEG-2 encoded video is proposed in this paper. This new method uses a Unified Metric for Digital Video Processing (UMDVP). The UMDVP is defined based on coding information of MPEG-2 encoded video. It also takes the local scene content into account. Experimental results have demonstrated that the joint approach using the UMDV...

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