A signal-processing algorithm has been developed where a filter function is extracted from degraded data through mathematical operations. The filter function can then be used to restore much of the degraded content of the data through use of a deconvolution algorithm. This process can be performed without prior knowledge of the detection system, a technique known as blind deconvolution. The extraction process, designated self-deconvolving data reconstruction algorithm, has been used successfully to restore digitized photographs, digitized acoustic waveforms, and other forms of data. The process is noniterative, computationally efficient, and requires little user input. Implementation is straightforward, allowing inclusion into many types of signal-processing software and hardware. The novelty of the invention is the application of a power law and smoothing function to the degraded data in frequency space. Two methods for determining the value of the power law are discussed. The first method assumes the power law is frequency dependent. The function derived comparing the frequency spectrum of the degraded data with the spectrum of a signal with the desired frequency response. The second method assumes this function is a constant of frequency. This approach requires little knowledge of the original data or the degradation.
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http://dx.doi.org/10.1364/ao.41.006884 | DOI Listing |
Phys Rev Lett
December 2024
Nanjing University, National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing 210093, China.
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View Article and Find Full Text PDFPain Ther
January 2025
Department of Trauma and Orthopaedic Surgery, Faculty of Medicine and Psychology, University La Sapienza, 00185, Rome, Italy.
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View Article and Find Full Text PDFNaunyn Schmiedebergs Arch Pharmacol
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Division of Nephrology, Faculty of Medicine, Department of Internal Medicine, Suleyman Demirel University, Isparta, Turkey.
The kidneys have a regulatory role in many diseases with their diuresis function and capacity to maintain electrolyte balance. In case of extensive damage, the kidney's filtration capacity is impaired and cannot fulfill its functions. Fluvoxamine (FLV), an antidepressant agent, has antioxidant and anti-inflammatory effects.
View Article and Find Full Text PDFMater Horiz
January 2025
School of Materials Scicence and Engineering, South China University of Technology, Guangzhou, 510640, China.
Multifunctional devices based on van der Waals heterojunctions have drawn significant attention owing to their portable size, low power consumption and various application scenarios. However, high fabrication equipment requirements, complex device structures and limited operating conditions hinder their potential value. Herein, multifunctional UV photodetect-memristors based on GaS/graphene/GaN van der Waals heterojunctions area selective deposition have been proposed for the first time.
View Article and Find Full Text PDFPhoton-counting computed tomography (PCCT) is superior in providing better CT image contrast than traditional CT technology. However, noticeable ring artifacts are more likely caused by the imperfect functioning of photon-counting detectors. This study proposes an efficient ring artifacts correction approach based on the unique characteristics of unwanted components in multi-domains.
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