In the process of signalprocessing, noise will affect the accuracy of data processing and research. The accuracy obtained by different algorithms is different[1]. In this paper, a variety of radar signal denoising al...
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ISBN:
(纸本)9781728146522
In the process of signalprocessing, noise will affect the accuracy of data processing and research. The accuracy obtained by different algorithms is different[1]. In this paper, a variety of radar signal denoising algorithms are discussed and simulated. Finally, the self-adaptive noise processing method[2] is described and optimized. The self-adaptive noise cancellation method is obtained. The comparison between the simulated data and the actual measurement data is obtained. It is proved that the self-adaptive RLS noise reduction effect studied in this paper is better, thus reducing the influence of noise.
With the growing digitalization of our society and the increasing development of Industry 4.0, the development of safe human-computer interfaces is of prime importance. For this purpose, we present a new solution for ...
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ISBN:
(纸本)9781728183398
With the growing digitalization of our society and the increasing development of Industry 4.0, the development of safe human-computer interfaces is of prime importance. For this purpose, we present a new solution for avoiding any physical contact between the human and the machine's display and/or its keyboard/pad. Hence, we developed an innovative imageprocessing algorithm which runs on the live video stream of the remote interaction between the human and the machine such as a computer or an intelligent agent;the video stream being captured by an off-the-shelf camera which is embedded in the main machine. The resulting computer-vision system performs visual object detection and tracking of a marker the user holds in one hand and could wave it from a distance in order to remotely interact with the interface of the machine. This remote interaction system has been successfully tested in real-world operational conditions, and the performance of this imageprocessing application has been evaluated in real time.
Heatmaps are widely used by road safety engineers to visualise accident data (where heat refers to the concentration of accidents). In the subfield of road accident black spot localisation, the high number of similar ...
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ISBN:
(纸本)9781728111179
Heatmaps are widely used by road safety engineers to visualise accident data (where heat refers to the concentration of accidents). In the subfield of road accident black spot localisation, the high number of similar black spot candidate locations makes this method unreliable and difficult to use. An additional process to convert the clusters of the heatmap into a list of black spot candidates results in an objective, comparable outcome. As we will show, the commonly used thresholding method (considering pixels above a given limit as parts of black spots) has several limitations. This paper presents a novel imageprocessing approach to quantify the raw data of the heatmap. It is possible to give a more accurate splitting between black spot and safe areas, using the morphological function named erosion.
Post dispatch analysis of signals obtained from digital disturbances registers provide important information to identify and classify disturbances in power systems, looking for a more efficient management of the suppl...
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ISBN:
(纸本)9781424407071
Post dispatch analysis of signals obtained from digital disturbances registers provide important information to identify and classify disturbances in power systems, looking for a more efficient management of the supply. In order to enhance the task of identifying and classifying the disturbances - providing an automatic assessment - techniques of digital signalprocessing can be helpful. The Wavelet Transform has become a very efficient tool for the analysis of voltage or current signals, obtained immediately after disturbances occurrences in the network. This paper presents a methodology based on the Discrete Wavelet Transform to implement this process. It uses a comparison between distribution curves of signals energy, with and without disturbance. This is done for different resolution levels of its decomposition in order to obtain descriptors that permit its classification, using artificial neural networks.
Traditional magnetic flux leakage signal need be processed through each channels in magnetic array data, that increased processing system complexity. This paper proposed a processing system for unsaturated magnetic im...
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ISBN:
(纸本)9781538636749
Traditional magnetic flux leakage signal need be processed through each channels in magnetic array data, that increased processing system complexity. This paper proposed a processing system for unsaturated magnetic image, the processes included image transformation, filtering and resolution enhancement. This system overcame the shortcomings of interpolation method and digital signalprocessing. The experimental results showed that every defects could effectively be extracted and a good reconstruction image of multi-frame super-resolution was obtained with 3 simulated sampling intervals.
Combining the static feature and the dynamic path in consecutive image array of small targets, this paper proposes a detecting method for small targets in sonar image: Improving the selection of (SRG) seeded region gr...
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ISBN:
(纸本)9780769548111
Combining the static feature and the dynamic path in consecutive image array of small targets, this paper proposes a detecting method for small targets in sonar image: Improving the selection of (SRG) seeded region growing method, and defining the size of searching sub window, this paper realizes the selection of suspected targets in single image that have certain SRR (signal-to-reverberation ratio);to enhance the detection probability, we build the relative moving modal of vessel and targets, considering the shaking of vessel, obtain the searching limits and moving path of suspected targets in consecutive image array, and raise the principle of targets determination utilizing the IVF (intensity variation function). Experiment results show the validity of the algorithm
Color quantization is a critical task, frequently involved in imageprocessing that reduces the number of distinct colors used in an image while retaining as much of the original representation capabilities. The key a...
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ISBN:
(纸本)9781467352062;9781467352055
Color quantization is a critical task, frequently involved in imageprocessing that reduces the number of distinct colors used in an image while retaining as much of the original representation capabilities. The key aspect here is to find the optimal palette and evaluate against unprocessed target images. The purpose of this paper is to compare the effectiveness of three well known unsupervised vector quantization algorithms (Neural Gas, Growing Neural Gas and Instantaneous Topological Map) in the field of color abstraction. Evaluation data for L*a*b* and L*u*v* uniform color spaces and a number of quality indices, exhibiting the performance in terms of overall quality, are presented.
Acute respiratory distress syndrome (ARDS) can occur in people with or without previous lung disease. Analysis of aeration in artificial ventilation for ARDS is one of the major applications of Computed Tomography (CT...
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ISBN:
(纸本)9781424407071
Acute respiratory distress syndrome (ARDS) can occur in people with or without previous lung disease. Analysis of aeration in artificial ventilation for ARDS is one of the major applications of Computed Tomography (CT) lung density examination. A movie of an affected rabbit lung over the respiratory cycle was produced by dynamic CT with a cine loop technique. This technique can produce thousands of CT images for analysis with a single experiment. A fully automated algorithm based on the capability of wavelet transformation to detect edges in the image is proposed. This method accurately and consistently segments the lung in pulmonary CT images. The speed and accuracy of this technique allows it to outperform other methods when dealing with the large number of images created by dynamic Computed Tomography.
This paper proposes an algorithm based on convolutional neural networks for the estimation of the quality level of voice signals transmitted through cellular communication systems. The objective is to take advantage o...
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ISBN:
(纸本)9781728114910
This paper proposes an algorithm based on convolutional neural networks for the estimation of the quality level of voice signals transmitted through cellular communication systems. The objective is to take advantage of artificial intelligence methods to estimate the MOS parameter and obtain a similar accuracy to that obtained by methods and procedures established in the international norms and international licensed standards. The proposed algorithm uses the MOS results obtained by the method detailed in the ITU-T P.862 standard. The values were obtained for different signals acquired at different reception points. With this information we proceeded to design and train a convolutional neuronal network of 4 layers, achieving very satisfactory results. For the validation, the mean square error was used to measure the degree of similarity of the MOS values obtained by ITU-T P.862 and by the proposed algorithm. The results show a mean square error of 0.00007 for the proposed algorithm.
The ability to explain the reasons for one's decisions to others is an important aspect of being human intelligence. We will look at the explainability aspects of the deep learning models, which are most frequentl...
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ISBN:
(纸本)9798350398823
The ability to explain the reasons for one's decisions to others is an important aspect of being human intelligence. We will look at the explainability aspects of the deep learning models, which are most frequently used in medical imageprocessing tasks. The Explainability of machine learning models in medicine is essential for understanding how the particular ML model works and how it solves the problems it was designed for. The work presented in this paper focuses on the classification of lung CT scans for the detection of COVID-19 patients. We used CNN and DenseNet models for the classification and explored the application of selected visual explainability techniques to provide insight into how the model works when processing the images.
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