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Motion and Noise Detection for Adaptive Spatio-Temporal Filtering of Medical X-Ray Image Sequences
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TLDR
In this article, the influence of noise and motion on Euler curves is investigated in the context of threshold determination for noise-adaptive binarization using Euler numbers, and a method processing the positive and negative pixel values of difference images independently in order to detect regions dominated by motion and single pixels dominated by noise.Abstract:
Spatio-temporalfilters are used to improve the perceived quality of X-ray image sequences exhibiting severe noise in real-time. The strength of spatial and temporal filtering has to be adapted locally in order to avoid artifacts. We propose a method processing the positive and negative pixel values of difference images independently in order to detect regions dominated by motion and single pixels dominated by noise. In the context of threshold determination for noise-adaptive binarization using Euler numbers, the influence of noise and motion on Euler curves is investigated.read more
Citations
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Patent
Noise reduction method and unit for an image frame
TL;DR: In this article, a method for noise reduction in a current image frame is presented, where the current frame is a part of a sequence of image frames, and the pixel difference between the current pixel value and the corresponding pixel value is below a pixel threshold.
Patent
Apparatus and method of motion detection for temporal mosquito noise reduction in video sequences
Xiaoyun Deng,Patricia Chiang +1 more
TL;DR: In this article, a method of motion detection in a sequence of digital images classifies a pixel of a plurality of pixels of a current image frame represented by a digital video input signal as a motion or non-motion pixel.
Patent
Method of Noise Reduction in Digital X-Ray Frames Series
TL;DR: In this article, a pyramid scheme for the block correspondence search is applied, where motion estimation blocks are considered overlapped, while motion compensation the block overlappings are averaged by applying a flat weighting window.
Book ChapterDOI
Real-Time denoising of medical x-ray image sequences: three entirely different approaches
TL;DR: In this article, the authors proposed three different methods with applications beyond medical image processing, including independent binarization of positive and negative temporal differences, real-time multiscale nonlinear diffusion in the presence of severe signal-dependent noise, and multi-resolution inter-scale correlation in shift-dependent pyramids.
Journal Article
Real-Time Denoising of Medical X-Ray Image Sequences : Three Entirely Different Approaches
TL;DR: Three different methods with applications beyond medical image processing are proposed, innovative motion detection based on independent binarization of positive and negative temporal differences, real-time multiscale nonlinear diffusion in the presence of severe signal-dependent noise, and multi-resolution inter-scale correlation in shift-dependent pyramids.
References
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Proceedings ArticleDOI
Image difference threshold strategies and shadow detection
Paul L. Rosin,Tim Ellis +1 more
TL;DR: Two problems associated with the detection and classification of motion in image sequences obtained from a static camera are considered, and an algorithm based on hysteresis thresholding is shown to give acceptably good results over a number of test image sets.
Journal ArticleDOI
X-ray fluoroscopy spatio-temporal filtering with object detection
R. Aufrichtig,David L. Wilson +1 more
TL;DR: A new filtering method, spatio-temporal filtering with object detection, is described that reduces noise while minimizing motion and spatial blur, and is demonstrated on several representative X-ray fluoroscopy sequences.
Book ChapterDOI
Noise Reduction with Edge Preservation by Multiscale Analysis of Medical X-Ray Image Sequences
TL;DR: A noise reduction method for X-ray image sequences using products of Laplacian pyramid coefficients that features SNR improvement comparable to the Wiener filter, however, being superior in the preservation of fine structures and generating a more stable image impression in sequences.
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