Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"artifact removal"”.
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Artifact removal in digital retinal images
… collected in the population are affected by artifacts, that render them ungradable both by expert graders and by the more recent automatic grading systems.;This work aims to develop an artifact removal strategy able to improve the effectiveness of retinal image grading, in particular for …
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Study on FPGA-based computation units for Ocular Artifact Removal algorithm for multi-channel Electroencephalography (EEG)
… noise canceling (ANC) algorithm for ocular artifact removal on Field Programmable Gate Arrays (FPGA) for multi-channel electroencephalography (EEG) signals. The primary objective is to analyze the mathematical representation of the ocular artifact removal algorithm and convert it to hardware …
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Motion Artifact Processing Techniques for Physiological Signals
… performed in the hospital environment, artifacts continue to be a major issue for these systems. The magnitude and frequency of artifacts can vary signi�cantly depending on the recording environment with one of the major contributions due to the motion of the subject or the recording …
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Signal Processing Methods for Reliable Extraction of Neural Responses in Developmental EEG
… with noise due to their uncontrollable movement artifacts. Since EEG processing methods for adults are not adapted to very short data length and usually deal with well-defined, stereotyped artifacts, they are unsuitable for newborn EEG. As a result, researchers manually clean the data, which is a …
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Compression artifact suppression for color images with dual-domain SE-ARResNet
… that it is possible to suppress JPEG compression artifacts and recover visually pleasing images. To recover original high-quality and high-resolution images from JPEG compressed images, we leverage prior knowledge of JPEG compression into consideration by exploiting frequency redundancies with the …
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Image reconstruction and imaging configuration optimization with a novel nanotechnology enabled breast tomosynthesis multi-beam X-ray system
… objects aimed at the performance of out-of-plane artifact removal. A frequency-domain-based methodology, relative NEQ(f) analysis, was investigated to evaluate the overall system performance based on the propagation of signal and noise. Conclusions were made to determine the optimal image …
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Ground-Based Hyperspectral Imaging and Data Analysis for Near-Vertical Outcrop Surfaces
… A workflow including data collection, sensor artifact removal, image preprocessing, and spectral data analysis was implemented. Three case studies from different geological settings were carried out to evaluate the potential of ground-based hyperspectral imaging in geological studies. In …
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Safety and data quality of EEG recorded simultaneously with multi-band fMRI
… ability to remove gradient and cardioballistic artifacts along with a clean spectrogram. The heating induced by the MB sequence was lower than that of the SB sequence by a factor of 0.73 ± 0.38. This is consistent with an expected heating ratio of 0.64, calculated from the square of the ratio of …
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Phenotyping Behavioral Disorders in REM Sleep: Study of Digital Biomarkers of Neurodegeneration
… was developed to address the challenges of artifact removal in dynamic and non-linear environments. The findings presented in this thesis underscore the transformative potential of interdisciplinary research, where engineering and medicine converge to solve complex problems. By introducing …
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Individual recognition from low quality and occluded images and videos using GAN
Face recognition in the wild is one of the most interesting problems in the present world. Many algorithms with high performance have already been proposed and applied in real-world applications. However, the problem of recognising degraded faces from low-quality images and videos mostly remains …
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Assessing the dependence of bulk ice properties from probes with anti-shatter tips on environmental conditions
… probes that can be contaminated by shattered artifacts generated by large particles shattering on the probe tips and inlets. Therefore this study has two main objectives. Prior estimates of ice crystal size distributions derived from 2D Cloud Probes (2DCs) have been artificially amplified by …
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Optimization for advanced lithography
… SID decomposition may result in severe residue artifacts on device patterns. Targeting residue artifact removal, we propose an enhanced SID decomposition flow with model-based verification. However, sometimes it is impossible to remove all artifacts through SID decomposition only. Besides that, …