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Liu, Ke. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references (leaves 41-46). / Abstracts in English and Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- Related Work --- p.7 / Chapter 2.1 --- Keyword Expansion --- p.7 / Chapter 2.2 --- Content-based Image Search and Visual Expansion --- p.8 / Chapter 3 --- Algorithm --- p.12 / Chapter 3.1 --- Overview --- p.12 / Chapter 3.2 --- Visual Distance Calculation --- p.14 / Chapter 3.2.1 --- Visual Features --- p.15 / Chapter 3.2.2 --- Adaptive Weight Schema --- p.17 / Chapter 3.3 --- Keyword Expansion --- p.18 / Chapter 3.4 --- Visual Query Expansion --- p.22 / Chapter 3.5 --- Image Pool Expansion --- p.24 / Chapter 3.6 --- Textual Feature Combination --- p.26 / Chapter 4 --- Experimental Evaluation --- p.27 / Chapter 4.1 --- Dataset --- p.27 / Chapter 4.2 --- Experiment One: Evaluation with Ground Truth --- p.28 / Chapter 4.2.1 --- Precisions on Different Steps --- p.28 / Chapter 4.2.2 --- Accuracy of Keyword Expansion --- p.31 / Chapter 4.3 --- Experiment Two: User Study --- p.33 / Chapter 5 --- Conclusion --- p.39

Chung, Hin Shun. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 40-43). / Abstracts in English and Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Lambertian photometric stereo --- p.1 / Chapter 1.2 --- Non-Lambertian photometric stereo --- p.3 / Chapter 1.3 --- Large specular lobe problems --- p.4 / Chapter 2 --- Related Work --- p.9 / Chapter 2.1 --- Lambertian photometric stereo --- p.9 / Chapter 2.2 --- Non-Lambertian photometric stereo --- p.9 / Chapter 2.2.1 --- Analytic models to reconstruct non-Lambertian surface --- p.9 / Chapter 2.2.2 --- Reference object based --- p.10 / Chapter 2.2.3 --- Highlight removal before shape reconstruction --- p.11 / Chapter 2.2.4 --- Polarization based method --- p.12 / Chapter 2.2.5 --- Specularity fitting method --- p.12 / Chapter 2.2.6 --- Photometric stereo with shadow --- p.12 / Chapter 3 --- Our System --- p.13 / Chapter 3.1 --- Estimation of global parameters --- p.14 / Chapter 3.1.1 --- Shadow separation --- p.16 / Chapter 3.1.2 --- Separation edges of shadow and edges of foreground object --- p.16 / Chapter 3.1.3 --- Normal estimation using shadow boundary --- p.20 / Chapter 3.1.4 --- Global parameter estimation and refinement --- p.22 / Chapter 3.2 --- Surface shape and texture reconstruction --- p.24 / Chapter 3.3 --- Single material results --- p.25 / Chapter 4 --- Comparison between Our Method and Direct Specularity Fitting Method --- p.29 / Chapter 4.1 --- Summary of direct specularity fitting method [9] --- p.29 / Chapter 4.2 --- Comparison results --- p.31 / Chapter 5 --- Reconstructing Multiple-Material Surfaces --- p.33 / Chapter 5.1 --- Multiple material results --- p.34 / Chapter 6 --- Conclusion --- p.38 / Bibliography --- p.39 / Chapter A --- Proof of Surface Normal Projecting to Gradient of Cast Shadow Boundary --- p.43

Cheng, Kei Tsi Daniel. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (leaves 45-49). / Abstracts in English and Chinese. / Abstract --- p.i / Acknowledgement --- p.iii / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- Background Knowledge --- p.6 / Chapter 2.1 --- Image Restoration using Total Variation Norm --- p.6 / Chapter 2.2 --- An Example of Tight Frame system --- p.10 / Chapter 2.3 --- Sparse and compressed representation --- p.13 / Chapter 2.4 --- Existence of minimizer in convex analysis --- p.16 / Chapter 3 --- Tight Frame Based Minimization --- p.18 / Chapter 3.1 --- Tight Frames --- p.18 / Chapter 3.2 --- Minimization Problems and Algorithms --- p.19 / Chapter 3.3 --- Other Minimization Problems --- p.22 / Chapter 4 --- Algorithm from minimization problem 3 --- p.24 / Chapter 5 --- Algorithm from minimization problem 4 --- p.28 / Chapter 6 --- Convergence of Algorithm 2 --- p.31 / Chapter 6.1 --- Inner Iteration --- p.31 / Chapter 6.2 --- Outer Iteration --- p.33 / Chapter 6.2.1 --- Existence of minimizer --- p.33 / Chapter 7 --- Numerical Results --- p.37 / Chapter 8 --- Conclusion --- p.44

Zhao, Ming. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (p. 111-117) and index. / Abstracts in English and Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Motivation --- p.1 / Chapter 1.2 --- Objective of the study --- p.2 / Chapter 1.3 --- Challenges and our approach --- p.4 / Chapter 1.4 --- Original contributions --- p.6 / Chapter 1.5 --- Organization of this dissertation --- p.6 / Chapter 2 --- Related Work --- p.9 / Chapter 2.1 --- Critical configuration for motion estimation and projective reconstruction --- p.9 / Chapter 2.1.1 --- Point feature --- p.9 / Chapter 2.1.2 --- Line feature --- p.12 / Chapter 2.2 --- Camera motion estimation --- p.14 / Chapter 2.2.1 --- Line tracking --- p.15 / Chapter 2.2.2 --- Determining camera motion --- p.19 / Chapter 3 --- Preliminaries on Three-View Geometry and Trifocal Tensor --- p.23 / Chapter 3.1 --- Projective spaces P3 and transformations --- p.23 / Chapter 3.2 --- The trifocal tensor --- p.24 / Chapter 3.3 --- Computation of the trifocal tensor-Normalized linear algorithm --- p.31 / Chapter 4 --- Linear Line Structures --- p.33 / Chapter 4.1 --- Models of line space --- p.33 / Chapter 4.2 --- Line structures --- p.35 / Chapter 4.2.1 --- Linear line space --- p.37 / Chapter 4.2.2 --- Ruled surface --- p.37 / Chapter 4.2.3 --- Line congruence --- p.38 / Chapter 4.2.4 --- Line complex --- p.38 / Chapter 5 --- Critical Configurations of Three Views Revealed by Line Correspondences --- p.41 / Chapter 5.1 --- Two-view degeneracy --- p.41 / Chapter 5.2 --- Three-view degeneracy --- p.42 / Chapter 5.2.1 --- Introduction --- p.42 / Chapter 5.2.2 --- Linear line space --- p.44 / Chapter 5.2.3 --- Linear ruled surface --- p.54 / Chapter 5.2.4 --- Linear line congruence --- p.55 / Chapter 5.2.5 --- Linear line complex --- p.57 / Chapter 5.3 --- Retrieving tensor in critical configurations --- p.60 / Chapter 5.4 --- Rank classification of non-linear line structures --- p.61 / Chapter 6 --- Camera Motion Estimation Framework --- p.63 / Chapter 6.1 --- Line extraction --- p.64 / Chapter 6.2 --- Line tracking --- p.65 / Chapter 6.2.1 --- Preliminary geometric tracking --- p.65 / Chapter 6.2.2 --- Experimental results --- p.69 / Chapter 6.3 --- Camera motion estimation framework using EKF --- p.71 / Chapter 7 --- Experimental Results --- p.75 / Chapter 7.1 --- Simulated data experiments --- p.75 / Chapter 7.2 --- Real data experiments --- p.76 / Chapter 7.2.1 --- Linear line space --- p.80 / Chapter 7.2.2 --- Linear ruled surface --- p.84 / Chapter 7.2.3 --- Linear line congruence --- p.84 / Chapter 7.2.4 --- Linear line complex --- p.91 / Chapter 7.3 --- Empirical observation: ruled plane for line transfer --- p.93 / Chapter 7.4 --- Simulation for non-linear line structures --- p.94 / Chapter 8 --- Conclusions and Future Work --- p.97 / Chapter 8.1 --- Summary --- p.97 / Chapter 8.2 --- Future work --- p.99 / Chapter A --- Notations --- p.101 / Chapter B --- Tensor --- p.103 / Chapter C --- Matrix Decomposition and Estimation Techniques --- p.104 / Chapter D --- MATLAB Files --- p.107 / Chapter D.1 --- Estimation matrix --- p.107 / Chapter D.2 --- Line transfer --- p.109 / Chapter D.3 --- Simulation --- p.109

Orientador: Fabrício César Lobato de Almeida / Banca: Marcos Silveira / Banca: Adyles Arato Junior / Resumo: Bicos aspersores são amplamente aplicados para irrigação, selecionados de acordo com a distribuição de spray desejada. Os defeitos apresentados nos bicos resultam em falhas na distribuição do spray, prejudicando a uniformidade de aplicação do fluido. Devido à dificuldade de observação do orifício dos bicos, a qualidade é geralmente analisada por inspeção visual do spray, um procedimento sujeito a erros de análise por falha humana ou problemas nas condições de observação. O objetivo deste trabalho é definir métodos para estimar a qualidade de bicos aspersores de spray de cone vazado a partir de imagens de vistas laterais do spray, identificando se o bico está em bom estado ou com defeitos que prejudiquem sua função. Com acesso a uma bancada de teste fornecido pela Spraying Systems Co. foram coletadas quatro imagens de vistas laterais do spray (frontal, traseira, lateral direita e esquerda) de bicos previamente definidos como bom estado ou defeituosos, utilizando então o padrão de intensidade das imagens para verificação de uniformidade do spray. Foi utilizado um filtro passa baixa aos sinais de intensidade visando a redução de ruídos e para melhoria dos resultados foi utilizado um método para aumento de contraste pela transformação de potência. A técnica se baseia na análise de padrões da intensidade das imagens adquiridas, conforme mencionado anteriormente. Portanto, realiza-se uma análise comparativa das área das curvas de intensidade nas quatro posições do spray para cada b... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Spray nozzles are widely used in crops irrigation, selected according to the desired spray distribution. The wear present in nozzles results in failures in spray distribution, compromising the uniformity of fluid application. Hence, the quality of sprays generated by nozzles is usually analyzed by visual inspection, but this procedure is related to the user experience and susceptible to errors. The objective of this work is to define methods to estimate the quality of hollow cone spray nozzles from four images of lateral views of the spray (front, back, right and left), which are then used to identify the nozzle health condition. A special bench provided by Spraying Systems Co.is used to collect the images in a controlled condition. Furthermore, the company also provided nozzles with different health conditions conditions sellected by experts. These conditions were classified as good, moderate and not acceptable. The analysis is carried out by using the intensity pattern of each nozzle to verify its uniformity. The method herein developed starts first pre-processing the collected images by using a low-pass filter to the intensity signals to attenuate undesirable noise together with the Power-Law Transformation which is applied to enhance the intensity highlighting its features. The intensity signals of the cross-section of spray nozzles are used to give the information related to the health condition on the nozzles. The main and simpler parameter used is the area given by the... (Complete abstract click electronic access below) / Mestre

This thesis develops an algorithm for approximate string matching and applies it to the problem of partially occluded object recognition. The algorithm measures the similarity of differing strings by scanning for matching substrings between strings. The length and number of matching substrings determines the amount of similarity. A classification algorithm is developed using the approximate string matching algorithm for the identification and classification of objects. A previously developed method of shape description is used for object representation.

acase@tulane.edu / Current microscopy-based tissue diagnostics, particularly hematoxylin and eosin (H&E) histology, requires multiple complex tissue processing steps: fixation, paraffin embedding, microtome sectioning, dying the tissue, and imaging individual slides through a bright field microscope. The time and labor-intensive result of this process makes it unsuitable for patient point-of-care evaluation. Therefore, many bedside procedures are completed without efficient real-time analysis of tissue adequacy and diagnostic results are unnecessarily delayed. Additionally, research experiments that require information regarding changes to tissue morphology or function before proceeding to the next experimental phase are severely interrupted by histology processing in their workflow. Fluorescence histology, which relies on rapid fluorescent staining of tissue, optical sectioning microscopy, and image processing for digital viewing, can provide an inexpensive, non-destructive, 3-dimensional, and fast alternative to traditional histology and point-of-care screening protocols. The objective of this work is to further advance the concept of “fluorescence histology,” in which traditional histopathology preparation methods are replaced by optical-sectioning (in lieu of physical sectioning), sensitive and flexible fluorescence-based contrast (in lieu of chromophore-based contrast), and computational strategies to replicate traditional color-schemes. In this work, we demonstrate the development and use of a fluorescent analogue to H&E on fixed and frozen tissue sections and fresh human biopsies. This fluorescent analogue, DRAQ5 & eosin, is compared against the current single-agent, monochrome fluorescence histology system, and their effects on diagnostic downstream molecular analyses, including quantitative-PCR and immunohistochemistry, is evaluated. We create a methodology to develop and characterize fluorescent analogues for any histological stain, with demonstration using Masson’s Trichrome and Periodic Acid-Schiff, enabling the expansion of fluorescence histology for multiple applications. This work demonstrates the ability to improve point-of-care pathology and research by replacing destructive, incomplete, and time-consuming histology with fluorescence histology, which preserves the tissue for later analysis or experiments while providing accurate and rapid histology assessment. / 1 / Katherine Elfer

Abstract not available