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Rozprawy doktorskie na temat „Denoising Filters”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

MOTTA, THIAGO RIBEIRO DA. "AN EVALUATION OF 2D FILTERS FOR SPECKLE DENOISING ULTRASOUND EXAMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33354@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>Exames de ultrassom são uma ferramenta popular de aquisição de imagens na medicina atual por ser um procedimento não-invasivo, seguro e barato. Entretanto, inerente a qualquer exame de ultrassom encontra-se o ruído speckle, responsável pela degradação da imagem e dificultando tanto sua interpretação por parte de médicos e pacientes, quanto prejudicando a acurácia de métodos comp

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Karam, Christina Maria. "Acceleration of Non-Linear Image Filters, and Multi-Frame Image Denoising." University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575976497271633.

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Chan, Tai Wai. "Applications of spatial varying filter on image interpolation, demosaicing and video denosing [i.e. denoising] /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?ECED%202006%20CHANT.

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DeNooyer, Eric-Jan D. "Statistical Idealities and Expected Realities in the Wavelet Techniques Used for Denoising." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3929.

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In the field of signal processing, one of the underlying enemies in obtaining a good quality signal is noise. The most common examples of signals that can be corrupted by noise are images and audio signals. Since the early 1980's, a time when wavelet transformations became a modernly defined tool, statistical techniques have been incorporated into processes that use wavelets with the goal of maximizing signal-to-noise ratios. We provide a brief history of wavelet theory, going back to Alfréd Haar's 1909 dissertation on orthogonal functions, as well as its important relationship to the earlier

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Duramaz, Alper. "Image Segmentation Based On Variational Techniques." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607721/index.pdf.

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Recently, solutions to the problem of image segmentation and denoising are developed based on the Mumford-Shah model. The model provides an energy functional, called the Mumford-Shah functional, which should be minimized. Since the minimization of the functional has some difficulties, approximate approaches are proposed. Two such methods are the gradient flows method and the Chan-Vese active contour method. The performance evolution in terms of speed shows that the gradient flows method converges to the boundaries of the smooth parts faster<br>but for the hierarchical four-phase segmentation,

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De, Santis Simone. "Quantum Median Filter for Total Variation denoising." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.

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In this work we present Quantum Median Filter, an image processing algorithm for applying Total Variation denoising to quantum image representations. After a brief introduction to TV model and quantum computing, we present QMF algorithm and discuss its design and efficiency; then we implement and simulate the quantum circuit using Qiskit library; finally we apply it to a set of noisy images, in order to compare and evaluate experimental results.

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Almahdi, Redha A. "Recursive Non-Local Means Filter for Video Denoising." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1481033972368771.

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Kassakian, Peter William. "Audio denoising using wavelet filter banks aimed at real-time application." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80508.

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Raichl, Jaroslav. "Zpracování obrazů raných smrkových kultur snímaných MR technikou." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217985.

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This semester project deals with filtering of the images detected by use of NMR obtained by NMR application measurement of nuclear magnetic resonance (NMR). This thesis includes the theory of nuclear magnetic resonance, digital filters, basic digital filter banks structures, theory of Wavelet transformation and description of Signal to Noise Ratio calculation. Basic procedure of the MR signal denoising is summarized in the theoretical part of the thesis. The denoising of the images detected by nuclear magnetic resonance is described. In experimental part filtering methods for images denoising

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Deng, Hao. "Mathematical approaches to digital color image denoising." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31708.

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Thesis (Ph.D)--Mathematics, Georgia Institute of Technology, 2010.<br>Committee Chair: Haomin Zhou; Committee Member: Luca Dieci; Committee Member: Ronghua Pan; Committee Member: Sung Ha Kang; Committee Member: Yang Wang. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Dalasari, Venkata Gopi Krishna, and Sri Krishna Jayanty. "Low Light Video Enhancement along with Objective and Subjective Quality Assessment." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13500.

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Enhancing low light videos has been quite a challenge over the years. A video taken in low light always has the issues of low dynamic range and high noise. This master thesis presents contribution within the field of low light video enhancement. Three models are proposed with different tone mapping algorithms for extremely low light low quality video enhancement. For temporal noise removal, a motion compensated kalman structure is presented. Dynamic range of the low light video is stretched using three different methods. In Model 1, dynamic range is increased by adjustment of RGB histograms us

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Tonelli, Fabio. "Schemi numerici per filtri di diffusione non lineari applicati al denoising di immagini." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3539/.

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La tesi tratta alcuni dei principali filtri di diffusione non lineari per il problema di denoising di immagini. In particolare pertendo dalla formulazione del problema come minimizzazione di un funzionale introduce modelli allo stato dell'arte come il filtro Lineare, di Perona Malik, alle Variazioni Totali e per Curvatura; infine un nuovo modello diffusivo sviluppato dal prof.Antonio Marquina è per la prima volta applicato al problema di denoising. Seguono numerosi schemi numerici alle differenze finite per risolverli, che generano procedimenti iterativi espliciti, impliciti e AOS. Verrà

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Durmaz, Murat. "One-dimensional Real-time Signal Denoising Using Wavelet-based Kalman Filtering." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608336/index.pdf.

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Denoising signals is an important task of digital signal processing. Many linear and non-linear methods for signal denoising have been developed. Wavelet based denoising is the most famous nonlinear denoising method lately. In the linear case, Kalman filter is famous for its easy implementation and real-time nature. Wavelet- Kalman filter developed lately is an important improvement over Kalman filter, in which the Kalman filter operates in the wavelet domain, filtering the wavelet coeffi- cients, and resulting in the filtered wavelet transform of the signal in real-time. The real-time filteri

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Akhbari, Mahsa. "Analyse des intervalles ECG inter- et intra-battement sur des modèles d'espace d'état et de Markov cachés." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT026.

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Les maladies cardiovasculaires sont l'une des principales causes de mortalité chez l'homme. Une façon de diagnostiquer des maladies cardiaques et des anomalies est le traitement de signaux cardiaques tels que le ECG. Dans beaucoup de ces traitements, des caractéristiques inter-battements et intra-battements de signaux ECG doivent être extraites. Ces caractéristiques comprennent les points de repère des ondes de l’ECG (leur début, leur fin et leur point de pic), les intervalles significatifs et les segments qui peuvent être définis pour le signal ECG. L'extraction des points de référence de l'E

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Jingle, Jiang. "ASSESSMENT OF FACTORS RELATED TO CHRONIC INTRACORTICAL RECORDING RELIABILITY." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1480417757397073.

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Guillemot, Thierry. "Méthodes et structures non locales pour la restaurationd'images et de surfaces 3D." Thesis, Paris, ENST, 2014. http://www.theses.fr/2014ENST0006/document.

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Durant ces dernières années, les technologies d’acquisition numériques n’ont cessé de se perfectionner, permettant d’obtenir des données d’une qualité toujours plus fine. Néanmoins, le signal acquis reste corrompu par des défauts qui ne peuvent être corrigés matériellement et nécessitent l’utilisation de méthodes de restauration adaptées. J'usqu’au milieu des années 2000, ces approches s’appuyaient uniquement sur un traitement local du signal détérioré. Avec l’amélioration des performances de calcul, le support du filtre a pu être étendu à l’ensemble des données acquises en exploitant leur car

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Guillemot, Thierry. "Méthodes et structures non locales pour la restaurationd'images et de surfaces 3D." Electronic Thesis or Diss., Paris, ENST, 2014. http://www.theses.fr/2014ENST0006.

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Durant ces dernières années, les technologies d’acquisition numériques n’ont cessé de se perfectionner, permettant d’obtenir des données d’une qualité toujours plus fine. Néanmoins, le signal acquis reste corrompu par des défauts qui ne peuvent être corrigés matériellement et nécessitent l’utilisation de méthodes de restauration adaptées. J'usqu’au milieu des années 2000, ces approches s’appuyaient uniquement sur un traitement local du signal détérioré. Avec l’amélioration des performances de calcul, le support du filtre a pu être étendu à l’ensemble des données acquises en exploitant leur car

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Facchinetti, Andrea. "On-Line Filtering Algorithms for Continuous Glucose Monitoring." Doctoral thesis, Università degli studi di Padova, 2009. http://hdl.handle.net/11577/3425934.

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Diabetes is a chronic disease characterized by the inefficiency of the pancreas to produce insulin (Type-1 diabetes), or by malfunctions in both insulin secretion and action (Type-2 diabetes). As a result, in a diabetic subject the plasma glycemic level exceeds the normal range, with several long and short term complications. Diabetes is taking on epidemic proportions with over 220 million individuals affected by this disease worldwide (1 over 20 adults, 95% of whom have Type-2 diabetes), a number which is expected to grow to 366 million by the year 2030. The conventional diabetes therapy i

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Juráček, Ivo. "Zabezpečení senzorů - ověření pravosti obrazu." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2020. http://www.nusl.cz/ntk/nusl-432921.

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Diploma thesis is about image sensor security. Goal of the thesis was study data integrity gained from the image sensors. Proposed method is about source camera identification from noise characteristics in image sensors. Research was about influence of denoising algorithms applied to digital images, which was acquired from 15 different image sensors. Finally the statistical evaluation had been done from computed results.

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Válek, Matěj. "Aproximativní implementace aritmetických operací v obrazových filtrech." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445540.

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Tato diplomová práce se zabývá aproximativní implementace aritmetických operací v obrazových filtrech. Zejména tedy využitím aproximativních technik pro úpravu způsobu násobení v netriviálním obrazovém filtru. K tomu je využito několik technik, jako použití převodu násobení s pohyblivou řadovou čárkou na násobení s pevnou řadovou čárkou, či využití evolučních algoritmů zejména kartézkého genetického programování pro vytvoření nových aproximovaných násobiček, které vykazují přijatelnou chybu, ale současně redukují výpočetní náročnost filtrace. Výsledkem jsou evolučně navržené aproximativní nás

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Penna, Pedro Augusto de Alagão. "Filtragem de ruído speckle em imagens de radar de abertura sintética por filtros de média não local com transformação homomórfica e distâncias estocásticas." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/579.

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Made available in DSpace on 2016-06-02T19:06:17Z (GMT). No. of bitstreams: 1 6277.pdf: 15816665 bytes, checksum: 105661656ee67fe816f34a96605797f9 (MD5) Previous issue date: 2014-01-23<br>The development of new methods and noisy images filtering techniques still attract researchers, which seek to reduce the noise with the minimal loss of details, edges, resolution and removal of fine structures of the image. Moreover, it is extremely important to expand the capacity of the filters for the different noise models present in the Image and Signal Processing literature, like the multiplicative n

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Sutour, Camille. "Vision nocturne numérique : restauration automatique et recalage multimodal des images à bas niveau de lumière." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0099/document.

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La vision de nuit des pilotes d’hélicoptère est artificiellement assistée par un dispositif de vision bas niveau de lumière constitué d’un intensificateur de lumière (IL) couplé à une caméra numérique d’une part, et d’une caméra infrarouge (IR) d’autre part. L’objectif de cette thèse est d’améliorer ce dispositif en ciblant les défauts afin de les corriger.Une première partie consiste à réduire le bruit dont souffrent les images IL. Cela nécessite d’évaluer la nature du bruit qui corrompt ces images. Pour cela, une méthode d’estimation automatique du bruit est mise en place. L’estimation repos

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Yi, Yudan. "On improving the accuracy and reliability of GPS/INS-based direct sensor georeferencing." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1186671990.

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Bhattacharya, Ranita. "Study of Color Image Denoising Filters." Thesis, 2016. http://ethesis.nitrkl.ac.in/9113/1/2016_MT_RBhattacharya.pdf.

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Image Denoising is an essential pre-processing task before the image is further processed by segmentation, feature extraction, texture analysis etc. Denoising is employed to evacuate the noise while retaining the sharp edges and other texture details of the image however much as could reasonably be expected. This noise gets present amid acquisition, transmission, and storage processes. Visual quality of the image is degraded due to the noise introduced in it. The noise considered in this thesis is additive white Gaussian noise (AWGN). Some spatial-Domain filters like Mean filter, Median filter

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Chiang, Chi_Lung, and 江季龍. "The Design of Some Filters for Image Denoising." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/54287129301336508691.

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碩士<br>國立中正大學<br>資訊工程研究所<br>89<br>In this thesis, we propose some approaches to suppressing impulsive noise. In chapter 2, we use a simple method to determine whether a pixel is corrupted. Before we correct a corrupted pixel, we do an edge detection procedure to determine whether an edge goes across the pixel. Thus we can decide how to suppress the noise according to the result of edge detection. This approach can not only suppress impulsive noise effectively but also preserve more details than traditional mean filter and median filter. In the experimental results of chapter 2, this approa

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Menon, Seeram V. "Savitzky-Golay Filters and Application to Image and Signal Denoising." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3844.

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We explore the applicability of local polynomial approximation of signals for noise suppression. In the context of data regression, Savitzky and Golay showed that least-squares approximation of data with a polynomial of fixed order, together with a constant window length, is identical to convolution with a finite impulse response filter, whose characteristics depend entirely on two parameters, namely, the order and window length. Schafer’s recent article in IEEE Signal Processing Magazine provides a detailed account of one-dimensional Savitzky-Golay (SG) filters. Drawing motivation from this i

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Menon, Seeram V. "Savitzky-Golay Filters and Application to Image and Signal Denoising." Thesis, 2015. http://etd.iisc.ernet.in/2005/3844.

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We explore the applicability of local polynomial approximation of signals for noise suppression. In the context of data regression, Savitzky and Golay showed that least-squares approximation of data with a polynomial of fixed order, together with a constant window length, is identical to convolution with a finite impulse response filter, whose characteristics depend entirely on two parameters, namely, the order and window length. Schafer’s recent article in IEEE Signal Processing Magazine provides a detailed account of one-dimensional Savitzky-Golay (SG) filters. Drawing motivation from this i

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Kishan, Harini. "On Maximizing The Performance Of The Bilateral Filter For Image Denoising." Thesis, 2015. https://etd.iisc.ac.in/handle/2005/2638.

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We address the problem of image denoising for additive white Gaussian noise (AWGN), Poisson noise, and Chi-squared noise scenarios. Thermal noise in electronic circuitry in camera hardware can be modeled as AWGN. Poisson noise is used to model the randomness associated with photon counting during image acquisition. Chi-squared noise statistics are appropriate in imaging modalities such as Magnetic Resonance Imaging (MRI). AWGN is additive, while Poisson noise is neither additive nor multiplicative. Although Chi-squared noise is derived from AWGN statistics, it is non-additive. Mean-square er

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Kishan, Harini. "On Maximizing The Performance Of The Bilateral Filter For Image Denoising." Thesis, 2015. http://hdl.handle.net/2005/2638.

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We address the problem of image denoising for additive white Gaussian noise (AWGN), Poisson noise, and Chi-squared noise scenarios. Thermal noise in electronic circuitry in camera hardware can be modeled as AWGN. Poisson noise is used to model the randomness associated with photon counting during image acquisition. Chi-squared noise statistics are appropriate in imaging modalities such as Magnetic Resonance Imaging (MRI). AWGN is additive, while Poisson noise is neither additive nor multiplicative. Although Chi-squared noise is derived from AWGN statistics, it is non-additive. Mean-square err

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Tang, Hsueh-Yung, and 唐學用. "Color Filter Array Denoising Method for Digital Cameras." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/8pv2r8.

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碩士<br>國立交通大學<br>電機學院碩士在職專班電機與控制組<br>96<br>Nowadays, traditional film camera has almost been replaced by digital camera in commercial market. This trend is not only on camera, but also on any product in which the signal can be digitalized, since digital information would be much convenience to be processed, stored, and transmitted. Image processing in digital camera consists of many processes. Almost all of the processes would enhance noise added in images. The best way to make noise strength be minimized is to reduce noise in front of any image processing. The difficulty of image denoising is

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Chen, Wei-Chang, and 陳維昌. "Fuzzy-Neighshrink Filter for Wavelet-based Image Denoising." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/75414076006412954326.

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碩士<br>國立宜蘭大學<br>電子工程學系碩士班<br>97<br>In image processing, it is a classical problem for denoising natural image corrupted by additive white Gaussian noise. Recently, wavelet shrinkages are shown to be useful methods in signal or image denoising. It is a relatively methodology. First, wavelet coefficients are obtained from noisy image by wavelet transform. Then, wavelet coefficients are sorted by grade and also shrunk by a suitable threshold. After shrinkage, denoised signal are got by processing the inverse wavelet transform. In this paper, a new Fuzzy-Neighshrink filter is proposed. By using t

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Liao, Shih-Yi, and 廖士頤. "A study of Soft-Switching Filter on Image Denoising." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/86911675010878412341.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>94<br>Digital images are often corrupted by impulse noise during image acquisition or transmission due to the interference of communication channels. How to efficiently remove the noise from the corrupted images has been an active research topic in the image processing community. In this thesis, a soft-switching technique has been developed to remove impulse noise from the corrupted image. The proposed method consists of two stages: noise detection and filtering. First, we use the concept of a homogeneous level to classify pixels into uncorrupted pixels and corrup

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Hsieh, Po-Shun, and 謝博順. "A VLSI Architecture of Bilateral Filter for Image Denoising." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/a6p5e4.

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碩士<br>國立彰化師範大學<br>資訊工程學系積體電路設計碩士班<br>105<br>The image processing may have lots of image noising caused by various reasons, these noising may disturb the use of the image. Therefore, the image de-noising is a very important technology for the application of the image processing. The processing of image de-noising must not destroy the image features. The bilateral filter is one of the most popular image de-noising technology in the field of image processing. The advantage of bilateral filter is to retain the details of image edge when processing of image de-noising, which also make it widely use

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Shih-Yi, Hsu, and 徐士宜. "Electrocardiogram denoising techniques based on EMD and zero phase filter." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/85033762892509518976.

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碩士<br>國立臺灣師範大學<br>機電科技研究所<br>98<br>Electrocardiogram (ECG) is the recording of the heart’s electrical potential versus time. These signals are often corrupted by three types of noise including baseline wander (BW) noise, power line interference and electromyographic (EMG) interference during the signal acquisition stage. These noise need to be attenuated in order to obtain a clean ECG signal for accurate diagnosis of heart condition. In the past decades, several methods have been proposed for the removal of the noise. In this dissertation, two new methods based on empirical mode decomposition

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KAVITA. "IMAGE DENOISING USING MOVING FRAME APPROACH BASED ON TRILATERAL FILTER." Thesis, 2018. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16523.

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Noise corrupts the images and in this manner their quality corrupts. This corruption incorporates concealment of edges, auxiliary points of interest, obscuring limits and so on. There are a few strategies to suppress the noise. The fundamental objective of denoising the image is to protect the critical element, for example, edges, limits and so on. Image compression separating is the way toward expelling noise which annoys image examination techniques. In a few applications like segmentation, denoising is intended to smooth homogeneous areas while safeguarding the shapes. Real-time denoising i

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Yue-LingDeng and 鄧悅翎. "A Low-Cost VLSI Architecture of Bilateral Filter for Image Denoising." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/99608006253771200008.

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碩士<br>國立成功大學<br>資訊工程學系<br>104<br>Real-world images may be dominated by all kinds of noises due to many reasons. In most case, these noises will interfere with the usage of the images. Thus, the technology of noise reduction is very important in processing images. In the field of image noise reduction, there is a major concern in removing noises from the images and at the same time without damaging the characteristics of it. Among the technologies of noise reduction, bilateral filtering is the most well-known technique in the field of image processing. The major advantage of using the bilateral

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Li, Cheng-Yuan, and 李正淵. "Automatic Brain Magnetic Resonance Image Denoising Using A GPU-Based Trilateral Filter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/49218573032509405566.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>104<br>Noise removal is one of the fundamental and essential tasks within image processing. In medical imaging, finding an effective algorithm that can remove random noise in magnetic resonance (MR) images is important. This thesis proposes an effective noise reduction method for brain MR images. The proposed is based on the trilateral filter, which is a more powerful method than the bilateral filter in many cases. However, the computation of the trilateral filter is quite time-consuming and the choice of the filter parameters is also laborious. To address thes

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黃教鈞. "Design of an Adaptive Median Filter for Salt-and-Pepper Image Denoising." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/84445309965868866888.

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碩士<br>國立彰化師範大學<br>資訊工程學系積體電路設計碩士班<br>104<br>Referring to previous researches regarding image processing, the elimination of the noise has played an important role, especially the most commonly seen salt-and-pepper noise. Moreover, median filter has been recognized as the most effective method to eliminate noise. The present study proposed an adaptive median filter architecture, in which the noise-detecting features of salt-and-pepper, and the trait of the two kinds of adaptive window with sorted pipeline to remove noise, were involved. In the current research, noise removal consisted of two st

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Chen, Kuan-Hsien, and 陳冠憲. "A Study of Temporal Denoising with Bilateral Filter on Time-of-Flight Depth Maps." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/16525544089842488478.

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碩士<br>國立臺灣科技大學<br>資訊工程系<br>103<br>As a result of noises on the depth maps captured by a Time-of-Flight (ToF) camera, 3D applications such as 3D reconstruction will generate low quality models. Hence, the process of denoisng depth maps is important. This study proposes a novel combination of denoising methods with the idea of the temporal denoising plus a bilateral filter. The temporal denoising represents the way that this study firstly selects a middle frame with multiple adjacent frames from all depth maps captured from different angles and then renew each depth value in the middle frame by

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Huang, Yen-Kai, and 黃彥凱. "A Study of Image Detail Enhancement Using Modified Shock Filter and Progressive Image Denoising Algorithm." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/4fb599.

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碩士<br>國立中興大學<br>資訊科學與工程學系<br>103<br>Image detail enhancement is popularly a method of image processing. The method can boost fine scale features by increasing the contrast of the pattern on the object. This can make image clearer and informative. We decompose a single image into a smoothed mean layer and several detail layers. To avoid causing halo effects at edges, we use edge-preserving decompositions to capture detail layer. Some of the existing methods to achieve detail enhancement decompose the image into a smoothed mean layer and several detail layers based on Gaussian filter and bilater

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Μαστρογιάννη, Αικατερίνη. "Εντοπισμός θέσης υπομικροσυστοιχιών και spots σε ψηφιακές εικόνες μικροσυστοιχιών". Thesis, 2010. http://nemertes.lis.upatras.gr/jspui/handle/10889/4004.

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Η τεχνολογία των DNA μικροσυστοιχιών είναι μια υψηλής απόδοσης τεχνική που καθορίζει το κατά πόσο ένα κύτταρο μπορεί να ελέγξει, ταυτόχρονα, την έκφραση ενός πολύ μεγάλου αριθμού γονιδίων. Οι DNA μικροσυστοιχίες χρησιμοποιούνται για την παρακολούθηση και τον έλεγχο των αλλαγών που υφίστανται τα επίπεδα της γονιδιακής έκφρασης λόγω περιβαλλοντικών συνθηκών ή των αλλαγών που λαμβάνουν χώρα σε ασθενή κύτταρα σε σχέση με τα υγιή, χρησιμοποιώντας εξελιγμένες μεθόδους επεξεργασίας πληροφοριών. Εξαιτίας του τρόπου με τον οποίον παράγονται οι μικροσυστοιχίες, κατά την πειραματική επεξεργασία τους, εμφ

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Wang, Chi-Yu, and 王齊宇. "An Effective Hybrid Denoising Method based on Median Filter and Inpainting Technique for High-density Impulse Noise." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/78827958337250708323.

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碩士<br>國立臺灣科技大學<br>資訊工程系<br>102<br>In this thesis, an effective median filter- and inpainting-based method for high density impulse noise removal is proposed. We first utilize the histogram distribution to identify the possible corrupted pixels. For each corrupted pixel, we count the number of uncorrupted neighboring pixels, and then a sorting process is applied to schedule the order of noise removal. For the current corrupted pixel, when the number of corrupted neighboring pixels is larger than the specified threshold, an inpainting technique is applied to remove the noise; otherwise, a median

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(6905153), Omar A. Elgendy. "Image Processing for Quanta Image Sensors." Thesis, 2019.

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Since the birth of charge coupled devices (CCD) and the complementary metal-oxide-semiconductor (CMOS) active pixel sensors, pixel pitch of digital image sensors has been continuously shrinking to meet the resolution and size requirements of the cameras. However, shrinking pixels reduces the maximum number of photons a sensor can hold, a phenomenon broadly known as the full-well capacity limit. The drop in full-well capacity causes drop in signal-to-noise ratio and dynamic range.<div><br></div><div>The Quanta Image Sensor (QIS) is a class of solid-state image sensors proposed by Eric Fossum in

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