Dissertations / Theses on the topic 'Changes in appearance'
To see the other types of publications on this topic, follow the link: Changes in appearance.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 28 dissertations / theses for your research on the topic 'Changes in appearance.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Park, Jae Young. "Evaluation of changes in image appearance with changes in displayed image size." Thesis, University of Westminster, 2014. https://westminsterresearch.westminster.ac.uk/item/8yv3x/evaluation-of-changes-in-image-appearance-with-changes-in-displayed-image-size.
Abstract:
This research focused on the quantification of changes in image appearance when images are displayed at different image sizes on LCD devices. The final results provided in calibrated Just Noticeable Differences (JNDs) on relevant perceptual scales, allowing the prediction of sharpness and contrast appearance with changes in the displayed image size. A series of psychophysical experiments were conducted to enable appearance predictions. Firstly, a rank order experiment was carried out to identify the image attributes that were most affected by changes in displayed image size. Two digital cameras, exhibiting very different reproduction qualities, were employed to capture the same scenes, for the investigation of the effect of the original image quality on image appearance changes. A wide range of scenes with different scene properties was used as a test-set for the investigation of image appearance changes with scene type. The outcomes indicated that sharpness and contrast were the most important attributes for the majority of scene types and original image qualities. Appearance matching experiments were further conducted to quantify changes in perceived sharpness and contrast with respect to changes in the displayed image size. For the creation of sharpness matching stimuli, a set of frequency domain filters were designed to provide equal intervals in image quality, by taking into account the system’s Spatial Frequency Response (SFR) and the observation distance. For the creation of contrast matching stimuli, a series of spatial domain S-shaped filters were designed to provide equal intervals in image contrast, by gamma adjustments. Five displayed image sizes were investigated. Observers were always asked to match the appearance of the smaller version of each stimulus to its larger reference. Lastly, rating experiments were conducted to validate the derived JNDs in perceptual quality for both sharpness and contrast stimuli. Data obtained by these experiments finally converted into JND scales for each individual image attribute. Linear functions were fitted to the final data, which allowed the prediction of image appearance of images viewed at larger sizes than these investigated in this research.
2
Frerichs, Dhana. "Computer graphics simulation of organic and inorganic optical and morphological appearance changes." Thesis, Bournemouth University, 2017. http://eprints.bournemouth.ac.uk/30016/.
Abstract:
Organic bodies are subject to internal biological, chemical and physical processes as well as environmental interactions after death, which cause significant structural and optical changes. Simulating corpse decomposition and the environmental effects on its surface can help improve the realism of computer generated scenes and provide the impression of a living, dynamic environment. The aim of this doctorate thesis is to simulate post mortem processes of the human body and their visual effects on its appearance. The proposed method is divided into three processes; surface weathering due to environmental activities, livor mortis and natural mummification by desiccation. The decomposing body is modelled by a layered model consisting of a tetrahedral mesh representing the volume and a high resolution triangle surface mesh representing the skin. A particle-based surface weathering approach is employed to add environmental effects. The particles transport substances that are deposited on the object’s surface. A novel, biologically-inspired blood pooling simulation is used to recreate the physical processes of livor mortis and its visual effects on the corpse’s appearance. For the mummification, a physically-based approach is used to simulate the moisture diffusion process inside the object and the resulting de- formations of the volume and skin. In order to simulate the colouration changes associated with livor mortis and mummification, a chemically-based layered skin shader that considers time and spatially varying haemoglobin, oxygen and moisture contents is proposed. The suggested approach is able to model changes in the internal structure and the surface appearance of the body that resemble the post mortem processes livor mortis, natural mummification by desiccation and surface weathering. The surface weathering approach is able to add blemishes, such as rust and moss, to an object’s surface while avoiding inconsistencies in deposit sizes and dis- continuities on texture seams. The livor mortis approach is able to model the pink colouration changes caused by blood pooling, pressure induced blanching effects, fixation of hypostasis and the purple discolouration due to oxygen loss in blood. The mummification method is able to reproduce volume shrinkage effects caused by moisture loss, skin wrinkling and skin darkening that are comparable to real mummies.
3
Herbozo, Sylvia. "The Effects of Ambiguous Appearance-related Feedback on Body Image, Mood States, and Intentions to Use Body Changes Strategies in College Women." Scholar Commons, 2007. https://scholarcommons.usf.edu/etd/290.
Abstract:
Previous research has demonstrated the influential role of physical appearance-related feedback in the development of body image and eating disturbances. Teasing and negative feedback have been established as strong correlates and predictors of body dissatisfaction, maladaptive eating behaviors, and psychological distress. However, very little is known about ambiguous appearance-related feedback and its impact on others. The current study sought to explore this area with an experimental study to examine the effects of ambiguous appearance-related feedback on body image, mood states, and intentions to use body change strategies. Undergraduate women (N=146) were randomly assigned to an ambiguous appearance-related or ambiguous nonappearance-related feedback condition. Body image, mood states, and intentions to diet, exercise, and use unhealthy weight control methods were assessed before and after feedback was provided by a confederate. Results indicated no significant differences between feedback conditions in body image and mood states. The mean trends for all mood state, with the exception of anger, indicated better mood states after ambiguous appearance-related feedback compared to after ambiguous nonappearance-related feedback. State anger was greater in the ambiguous appearance-related feedback condition suggesting that this particular type of feedback was interpreted in a negative manner. Further, there was a significant difference between feedback conditions for intentions to diet and use bulimic behaviors, with lower levels in the ambiguous appearance-related feedback condition. No significant differences were found for intentions to exercise. State appearance comparison was not shown to mediate the relationship between ambiguous feedback and body image, mood states, or intentions to use body change strategies. Trait appearance satisfaction, appearance comparison, appearance schematicity, and thin ideal internalization were found to moderate the relationship between ambiguous feedback and state depression. Trait appearance comparison moderated the relationship between ambiguous feedback and intentions to use bulimic behaviors. Exploratory analyses conducted with subsamples developed using high versus low levels of trait disturbance showed significant results for the subsample based on trait appearance comparison levels. The findings are discussed in the context of possible reasons for the unexpected responses to the ambiguous appearance-related versus nonappearance-related feedback. The limitations of the study and directions for future research are also noted.
4
Grosbellet, Francois. "Génération de détails dans les mondes procéduraux." Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0110/document.
Abstract:
La génération de mondes virtuels est un domaine de recherche très actif en informatique graphique : la modélisation de plantes, d’arbres, de bâtiments, de villes ou de terrains, et les simulations de vieillissement sont des domaines très explorés. Dans ce contexte, les changements d’apparences constituent également un domaine de recherche important, de part leur impact majeur dans le réalisme des scènes virtuelles produites. Ces travaux se concentrent sur la mise au point d’approches procédurales permettant de représenter les changements d’apparence sous la forme de décorations géométriques (accumulation de neige ou formation de glace, dépôt de feuilles mortes, etc.) à la fois à grande échelle et avec un très haut niveau de détail. Nous proposons d’abord un modèle d’organisation hiérarchique de scènes qui repose sur un arbre de construction dont les feuilles sont des objets environnementaux, des objets qui génèrent eux mêmes leurs décorations géométriques. Nous présentons ensuite un formalisme implicite pour définir l’environnement, qui contient l’ensemble des informations guidant la génération des décorations. Finalement, nous détaillons quatre méthodes de génération procédurale pour la création des décorations géométriques (neige, glace, herbes, feuilles) des objets environnementauxProcedural modeling of virtual worlds is an active research field in computer science. A large amount of methods have been published in this field : modeling of plants, trees, buildings, cities or terrains, and aging and weathering simulations. In this context, changes of appearance are a very active research field too, due to the way they impact the realism of produced virtual scenes. This research focuses on a procedural method that can represent the changes of appearance as geometrical decorations (snowfall, ice growth, leaves deposits, etc.) on very big scenes with a high level of details. We first propose a hierarchical scene design based on a construction tree whose leaves are environmental objects, a new kind of objects that generate their own geometrical decorations. We then present an implicit formalism to define the environment that contains all the information needed to guide decorations generation. Finally, we detail four procedural methods for generating the geometrical decorations (snow, ice, grass, leaves) of the environmental objects
5
Linegar, Chris. "Vision-only localisation under extreme appearance change." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:608762bd-5608-4e50-ab7b-da454dd52887.
Abstract:
Robust localisation is a key requirement for autonomous vehicles. However, in order to achieve widespread adoption of this technology, we also require this function to be performed using low-cost hardware. Cameras are appealing due to their information-rich image content and low cost; however, camera-based localisation is difficult because of the problem of appearance change. For example, in outdoor en- vironments the appearance of the world can change dramatically and unpredictably with variations in lighting, weather, season and scene structure. We require autonomous vehicles to be robust under these challenging environmental conditions. This thesis presents Dub4, a vision-only localisation system for autonomous vehicles. The system is founded on the concept of experiences, where an "experience" is a visual memory which models the world under particular conditions. By allowing the system to build up and curate a map of these experiences, we are able to handle cyclic appearance change (lighting, weather and season) as well as adapt to slow structural change. We present a probabilistic framework for predicting which experiences are most likely to match successfully with the live image at run-time, conditioned on the robot's prior use of the map. In addition, we describe an unsupervised algorithm for detecting and modelling higher-level visual features in the environment for localisation. These features are trained on a per-experience basis and are robust to extreme changes in appearance, for example between rain and sun, or day and night. The system is tested on over 1500km of data, from urban and off-road environments, through sun, rain, snow, harsh lighting, at different times of the day and night, and through all seasons. In addition to this extensive offline testing, Dub4 has served as the primary localisation source on a number of autonomous vehicles, including the Oxford University's RobotCar, the 2016 Shell Eco-Marathon, the LUTZ PathFinder Project in Milton Keynes, and the GATEway Project in Greenwich, London.
6
Gupta, Preeti. "Change in colour appearance of small defocused lights." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/30424/1/Preeti_Gupta_Thesis.pdf.
Abstract:
Small long wavelength lights (≤ 1’ arc) change colour appearance with positive defocus, appearing yellow or white. I investigated influences of longitudinal chromatic aberration and monochromatic aberrations on colour appearance of small narrow band lights. Seven cyclopleged participants viewed a small light (1’ arc diameter, λmax range 510 - 628 nm) centred within a 4.6’ black annulus and surrounded by a uniform white field under photopic light levels. An optical trombone varied focus. Participants were required to vary the focus by moving the optical trombone in either positive or negative direction and report when they noticed a change in appearance of the defocused narrow band light. Longitudinal chromatic aberration was controlled using a Powell achromatizing lens and its doublet and triplet components that neutralized, doubled and reversed the eye’s chromatic aberration, respectively. Changes in colour appearance for a 628 nm light occurred without any lens at +0.5 ± 0.2D defocus and with the doublet at +0.6 ± 0.2 D. The achromatizing lens did not affect appearance and the phenomenon was evident with the triplet for negative defocus (-0.5 ± 0.3 D). Adaptive optics correction of astigmatism and higher order monochromatic aberration did not affect magnitude significantly. Colour changes occurred despite a range of participant L/M cone ratios. Direction of change in colour appearance was reversed for short compared to long wavelengths. We conclude that longitudinal chromatic aberrations, but not monochromatic aberrations, are involved in changing appearance of small lights with defocus. Additional neuronal mechanisms that may contribute to the colour changes are considered.
7
Shepherd, Iona. "The experience of acquiring a significant change to facial appearance." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/18221/.
Abstract:
This thesis was concerned with the psychosocial experience of living with a significant change to facial appearance acquired through trauma or disease. The thesis comprises a literature review and a report of an original research study. The review used a meta-ethnography approach to synthesise qualitative literature on the experience of altered facial appearance following cancer. The findings demonstrate the varying experience of changed facial appearance depending on the stage of the disease or treatment, with appearance being more salient at less acute stages of cancer treatment. Changes to appearance lead to experiences of stigma and threatened self-image and self-identity, necessitating a range of coping strategies. Clinical implications and future research needs are outlined. The research study aimed to understand the experience of living with a facial prosthesis using Interpretative Phenomenological Analysis. Findings indicate that a prosthesis could restore normalcy and enable social participation, however the impact of having altered facial appearance continued to pervade the experience and practicalities continued to be problematic. Social support and humour were notable factors contributing to positive adjustment. This research implicates a role for peer support interventions in this population, and further research is needed to explore different stages and levels of adjustment.
8
Watson, Deryn Margaret. "Information technology in geography classes : the appearance and reality of change." Thesis, King's College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340880.
9
Rogers, Elizabeth Rachel. "The effect of a change in percepual verbs on intellectual realism errors in appearance-reality tasks." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28275.
Abstract:
Pillow & Flavell (1985) argue that the phrase 'look like' increases the tendency of young children to commit intellectual realism errors. The present study followed their procedures with the Block Arrays (which includes the Hidden Block task) and, in addition, included the identity task from a previous appearance-reality study by Flavell, Flavell & Green (1983). Forty-two three- and four-year-old preschoolers were presented with a variety of block arrays (Block Arrays task) and realistic-looking fake objects (Identity task) to observe. The subjects were tested on all of the stimulus items in one task before being tested on the second one. Half the subjects received the Block Arrays task first, half received the Identity task first. After the presentation of each array or object, the subject was asked a test question about its appearance while looking at it through a viewing tube. In the Look Like Condition, the test question included the words 'look like' and in the See Condition, the verb 'see' was used instead of 'look like'. If the subjects made any errors in the first condition (Look Like), they then received the second condition (See). No difference was found in the childrens' performance in the Hidden Block task but there was a difference in their performance in the Identity task. However, this difference cannot be attributed solely to the two wordings but rather to some interaction of task type and condition. Further analysis of the Look Like Condition revealed an Age-by-Task interaction in which the threes and fours performed differently in each task. A significant main effect for each of Task and Gender was also found in the Look Like Condition.Education, Faculty of
Educational and Counselling Psychology, and Special Education (ECPS), Department of
Graduate
10
Macleod, Ruth. "The lived experience of a burn injury, with particular reference to appearance change and trauma symptomology." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/6725/.
11
Peyrafort, Manon. "Emotion et prise de décision chez la seiche, Sepia." Electronic Thesis or Diss., Normandie, 2023. http://www.theses.fr/2023NORMC259.
Abstract:
En 2013, les céphalopodes sont intégrés dans la directive européenne 2010/63/UE qui impose aux scientifiques de leur fournir des conditions de bien-être en laboratoire. Or, ils ne disposent d’aucun outil d’évaluation. Les réponses émotionnelles des animaux s’avèrent être de bons indicateurs pour évaluer leur bien-être en captivité. Cette thèse vise donc à identifier des indicateurs comportementaux chez la seiche commune. La seiche réalise des changements d’apparence (chromatiques et texturaux), qui s’apparentent dans leur fonctionnement aux expressions faciales des vertébrés. Ces changements s’observent notamment dans un contexte alimentaire, un contexte propice à l’expression d’émotions. Dans un premier temps, les travaux menés décrivent les changements d’apparence des seiches lors de l’attaque d’une proie pour identifier les composants exprimés. Dans un second temps, ces derniers sont évalués dans des contextes de prédation induisant probablement des émotions de valence et d’intensité différentes, ainsi que dans un contexte social compétitif. Les résultats obtenus mettent en évidence 8 composants (1 textural et 7 chromatiques, dont 3 observés pour la première fois) qui sont exprimés différemment d’une seiche à l’autre et d’un contexte à l’autre. Lors de l’attaque d’une proie, les seiches semblent donc réaliser deux stratégies différentes de camouflage (l’une « chromatique » et l’autre « textural ») dirigées vers un prédateur. Ces stratégies semblent révéler un trait de personnalité. Pour les seiches qui utilisent la première stratégie, l’expression de 6 composants chromatiques semblent corrélés à leurs préférences et à leur motivation. Cette thèse conclut que les changements chromatiques intègrent probablement une composante émotionnelle et propose pour la première fois que les seiches ont des états affectifs, mais sans pouvoir l’affirmer avec certitude. A l’avenir, les composants chromatiques pourraient être proposés comme un outil pour l’évaluation du bien-être des seiches, du moins au niveau alimentaireIn 2013, cephalopods were included in European Directive 2010/63/EU, which requires scientists to provide them with welfare conditions in the laboratory. However, they do not have any evaluation tools. The emotional responses of animals are proving to be good indicators for assessing their welfare in captivity. The aim of this thesis is therefore to identify behavioural indicators in common cuttlefish. Cuttlefish change their appearance (chromatically and texturally) which are similar in function to the facial expressions of vertebrates. These changes are particularly observed in a feeding context, a context that is conducive to the expression of emotions. Firstly, the work described the changes in the appearance of cuttlefish when attacking prey to identify the components expressed. Secondly, these components were evaluated in predation contexts, probably inducing emotions of different valence and intensity, as well as in a competitive social context. The results highlight 8 components (1 textural and 7 chromatic, including 3 observed for the first time) that are expressed differently from one cuttlefish to another and from one context to another. When attacking prey, cuttlefish therefore appear to use two different camouflage strategies (one “chromatic” and the other “textural”) directed towards a predator. These strategies seem to reveal a personality trait. For cuttlefish using the first strategy, the expression of 6 chromatic components seems to correlate with their preferences and motivation. This thesis concludes that chromatic changes probably integrate an emotional component and proposes for the first time that cuttlefish have affective states, but without being able to state it with certainty. In the future, chromatic components could be proposed as a tool for evaluating the welfare of cuttlefish, at least at the feeding level
12
Runquist, Josefin. "Change in motion : Investigating how to change a garment´s appearance in volume through movementand air with pleating as the main technique." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-638.
Abstract:
This bachelor degree work investigates the change of the visual expression in motion. The movement of the body can change the garment´s appearance. The aim of this work is to explore how to change a garment´s visual appearance through movement and air, with the technique of pleats. The design method of this work has been to analyse the movement of a model when entering a catwalk. The air that effects the garment can change the garment´s volume. The method includes experiment with different techniques and material to analyse how the air can be used to change the garment´s appearance in volume. The result are various examples of air captured into the garment to change the garment from a minimalistic expression to a voluminous garment with light weight material. Print has been added to highlight the transformation and movement. This work shows the potential of working with a garment in movement and to gain a voluminous shape with the use of air. Light weight material has been used to create the shapes and this can be useful in the argument of sustainability in the textile industry.
13
Rennie, Caroline. "New normal : a grounded theory study of reconciling change in appearance and function for men with head and neck cancer." Thesis, University of Stirling, 2016. http://hdl.handle.net/1893/25150.
Abstract:
HNC incidence and mortality is greater in men and is associated with high risk behaviours and social deprivation. HNC is frequently diagnosed at advanced stages requiring multi-modality treatment which can have a significant impact on appearance and function. Gender can influence health behaviours yet research into male experiences of cancer has primarily focussed on prostate cancer and HNC is an area which is under investigated. The aim of this study was to explore how men with HNC experience appearance and functional change in the first 12 months following diagnosis. Grounded theory methodology (GT) was chosen as the overall purpose of GT is the generation of theory from the data which has explanatory power and advances the understanding of social and psychological phenomena. Retrospective semi-structured interviews were performed with 12 men who were 12 to 24 months post-diagnosis. Key components of GT practice used were simultaneous data collection and analysis, constructing analytic categories from the data, constant comparison, memo-writing and theoretical sampling. Three categories emerged from the data which were inter-related: normalising change; “under siege”: getting through treatment; and reclaiming self. The core category was reconciling change; a new normal which reflects the social and psychological processes involved in accommodating and assimilating change in appearance and function for men with HNC. The substantive theory provides insight into how men with HNC prioritise function and actively distance themselves from concerns regarding appearance. Furthermore, it identifies men who are at risk of social anxiety and isolation due to multiple changes or body incompetence. This study builds on theories of masculinity, body image and disfigurement. The substantive theory developed provides health and social care professionals with new knowledge to support clinical practice and improve care provision.
14
Schuster, Elizabeth B. "Easing the teasing the effects of appearance-related feedback on body image disturbance, eating pathology, body change behaviors, and self-objectification." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4571.
Abstract:
Appearance-related commentary can be positive or negative. Such commentary has been shown to negatively affect the mental health and well-being of women in a well-documented body of research. There is limited research on this topic pertaining to males. The purpose of this study was to investigate the effects of appearance-related commentary in men. Results indicate that men who receive more negative commentary are more likely to experience eating pathology, body dissatisfaction, distress from commentary, and participate in compulsive exercising and appearance-change behaviors. However, men that receive positive commentary are likely to experience more positive outcomes, reporting less dissatisfaction and pathology but more appearance-change behaviors. It appears that men are affected by negative, appearance-related commentary in the same ways that women are, but that they experience positive commentary in a more direct and appropriate manner. Additionally, self-objectification, a covariate found to interact in similar relations with women, was not found to account for any of the variance between appearance-related feedback and outcomes.ID: 029051091; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.)--University of Central Florida, 2010.; Includes bibliographical references (p. 61-71).
M.S.
Masters
Department of Clinical Psychology
Sciences
15
Herbozo, Sylvia. "The effects of ambiguous appearance-related feedback on body image, mood states, and intentions to use body change strategies in college women." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002487.
16
Donaldson, Maria J. "Change Detection Ability in Naturalistic Scenes: Are Object Appearances or Disappearances easier to Detect when Disappearances should be more Noticeable?" Cleveland State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=csu1314284055.
17
Neubert, Peer. "Superpixels and their Application for Visual Place Recognition in Changing Environments." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-190241.
Abstract:
Superpixels are the results of an image oversegmentation. They are an established intermediate level image representation and used for various applications including object detection, 3d reconstruction and semantic segmentation. While there are various approaches to create such segmentations, there is a lack of knowledge about their properties. In particular, there are contradicting results published in the literature. This thesis identifies segmentation quality, stability, compactness and runtime to be important properties of superpixel segmentation algorithms. While for some of these properties there are established evaluation methodologies available, this is not the case for segmentation stability and compactness. Therefore, this thesis presents two novel metrics for their evaluation based on ground truth optical flow. These two metrics are used together with other novel and existing measures to create a standardized benchmark for superpixel algorithms. This benchmark is used for extensive comparison of available algorithms. The evaluation results motivate two novel segmentation algorithms that better balance trade-offs of existing algorithms: The proposed Preemptive SLIC algorithm incorporates a local preemption criterion in the established SLIC algorithm and saves about 80 % of the runtime. The proposed Compact Watershed algorithm combines Seeded Watershed segmentation with compactness constraints to create regularly shaped, compact superpixels at the even higher speed of the plain watershed transformation.
Operating autonomous systems over the course of days, weeks or months, based on visual navigation, requires repeated recognition of places despite severe appearance changes as they are for example induced by illumination changes, day-night cycles, changing weather or seasons - a severe problem for existing methods. Therefore, the second part of this thesis presents two novel approaches that incorporate superpixel segmentations in place recognition in changing environments. The first novel approach is the learning of systematic appearance changes. Instead of matching images between, for example, summer and winter directly, an additional prediction step is proposed. Based on superpixel vocabularies, a predicted image is generated that shows, how the summer scene could look like in winter or vice versa. The presented results show that, if certain assumptions on the appearance changes and the available training data are met, existing holistic place recognition approaches can benefit from this additional prediction step. Holistic approaches to place recognition are known to fail in presence of viewpoint changes. Therefore, this thesis presents a new place recognition system based on local landmarks and Star-Hough. Star-Hough is a novel approach to incorporate the spatial arrangement of local image features in the computation of image similarities. It is based on star graph models and Hough voting and particularly suited for local features with low spatial precision and high outlier rates as they are expected in the presence of appearance changes. The novel landmarks are a combination of local region detectors and descriptors based on convolutional neural networks. This thesis presents and evaluates several new approaches to incorporate superpixel segmentations in local region detection. While the proposed system can be used with different types of local regions, in particular the combination with regions obtained from the novel multiscale superpixel grid shows to perform superior to the state of the art methods - a promising basis for practical applications.
18
Jain, Monika. "Regularized ensemble correlation filter tracking." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/229266/1/Monika_Jain_Thesis.pdf.
Abstract:
Visual Object Tracking is the task of tracking an object within a video. Broadly, most tracking algorithms can be classified into neural network based, correlation filter based, and hybrid. This thesis investigates various methods to improve tracking using correlation filters. The thesis contributes four novel trackers. The first tracker uses an appearance model pool to avoid faulty filter updates. Next, the appearance feature channel weights are learned using the graph-based similarity followed by modelling sparse spatio-temporal variations. At last, non-linearity of the appearance features is captured. The thesis also presents extensive evaluation of the proposed trackers on standard datasets.
19
Pavani, Sri-Kaushik. "Methods for face detection and adaptive face recognition." Doctoral thesis, Universitat Pompeu Fabra, 2010. http://hdl.handle.net/10803/7567.
Abstract:
The focus of this thesis is on facial biometrics; specifically in the problems of face detection and face recognition. Despite intensive research over the last 20 years, the technology is not foolproof, which is why we do not see use of face recognition systems in critical sectors such as banking. In this thesis, we focus on three sub-problems in these two areas of research. Firstly, we propose methods to improve the speed-accuracy trade-off of the state-of-the-art face detector. Secondly, we consider a problem that is often ignored in the literature: to decrease the training time of the detectors. We propose two techniques to this end. Thirdly, we present a detailed large-scale study on self-updating face recognition systems in an attempt to answer if continuously changing facial appearance can be learnt automatically.L'objectiu d'aquesta tesi és sobre biometria facial, específicament en els problemes de detecció de rostres i reconeixement facial. Malgrat la intensa recerca durant els últims 20 anys, la tecnologia no és infalible, de manera que no veiem l'ús dels sistemes de reconeixement de rostres en sectors crítics com la banca. En aquesta tesi, ens centrem en tres sub-problemes en aquestes dues àrees de recerca. En primer lloc, es proposa mètodes per millorar l'equilibri entre la precisió i la velocitat del detector de cares d'última generació. En segon lloc, considerem un problema que sovint s'ignora en la literatura: disminuir el temps de formació dels detectors. Es proposen dues tècniques per a aquest fi. En tercer lloc, es presenta un estudi detallat a gran escala sobre l'auto-actualització dels sistemes de reconeixement facial en un intent de respondre si el canvi constant de l'aparença facial es pot aprendre de forma automàtica.
20
Zardini, Elia. "Living on the slippery slope : the nature, sources and logic of vagueness." Thesis, St Andrews, 2008. http://hdl.handle.net/10023/508.
21
Turpin, Olivier. "La ligne, l’onde, le pli dans la couleur." Electronic Thesis or Diss., Paris 8, 2021. http://www.theses.fr/2021PA080040.
Abstract:
« L’expérience est la mise en question (à l’épreuve) dans la fièvre et dans l’angoisse, de ce qu’un homme sait du fait d’être ». Une telle manière de définir une « expérience » que Georges Bataille qualifie d’« intérieure », nous oblige à nous questionner autour des enjeux et de l’objet de la philosophie en tant que celle-ci réalise le nouage entre pensée et vie.Elle soulève, au fond, l’interrogation suivante : quel doit être l’être du sujet pour qu’il soit capable de vérité, quelles opérations doit-il faire sur lui-même afin de se transformer et de se rendre capable de vérité ? Quel prix a-t-il à payer pour dire le vrai (et quel est, en retour, l’effet de transformation sur lui du fait qu’il dit le vrai) ? De telles questions soulevées par la méditation sur l’expérience intérieure, seront traitées à partir de trois corpus de textes, relevant de deux genres de discours et même de deux régimes d’écriture fort différents : celui signé Bataille, celui signé Nietzsche et celui signé Camus. Bataille et Camus étant tributaires à bien des égards de la philosophie de Nietzsche, ils méditent l’un comme l’autre, à l’originalité d’une expérience n’ayant d’autre fins qu’elle-même et montrant à l’homme le chemin vers l’existence souveraine. Cela revient à situer donc la question de l’expérience unique, souveraine, hors délai, dans le champ de l’écriture : écriture philosophique, écriture littéraire ou romanesque. Précisons que la lecture que Bataille et Camus font du corpus nietzschéen, se fait du point de vue de la problématique de l’expérience souveraine qui a été la sienne, ce qui entraîne un certain nombre de conséquences. Sur cette corde raide, tendue par Nietzsche à ses successeurs, lesquels ont voulu purifier son œuvre des interprétations fascisantes et lui rendre justice, Georges Bataille et Albert Camus, avancent leur méditation sur une expérience d’écriture les amenant bien au-delà d’eux-mêmes. Il s’agira, à partir du prisme de la méditation intérieure, ainsi que de l’expérience paradigmatique de Nietzsche, de montrer de quelle expérience d’écriture chacun d’entre eux est le nomThis thesis focuses a body of paintings and wall paintings initiated in 2014 and continuing to the present day. It was a pivotal year when I went from figurative painting to abstract painting based on the drawing of an endless line that never intersects. The purpose of this research is to analyze this ‘line being’ that replaced the figure, organizing itself in colored waves, folds, overlays and twists. If chance secretly directs the drawing of the line on the canvas or in situ, it acts in respecting opposing forces and notions, such as emptiness and fullness, background and form, appearance and disappearance, form and formlessness. The line is thus a pictorial version of the twisting Möbius ribbon that places the front and back on the same side. It is by this principle that it becomes dynamic and generates a cosmogony within which the wave and the fold move before bursting into color. The proliferation of the biomorphic line has given rise to creative phases that constitute my field of investigation. A painting is an “X-ray of action”. How did the line change into a wave? How does the line, by means of hollowing out and “alternate overlapping,” continue its path and open up possibilities of forms and voids? How does the sliding of paint create the illusion of movement through transparency and depth? Finally, how did the dripping gesture in painting emerge as the “being” that would become color?
22
Xu, Xin-Ling, and 徐欣伶. "Dynamic changes of NuMA during the cell cycle and the appearance of a truncated form of NuMA during apoptosis." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/79980967248749638748.
23
kuo, Pey Chen, and 郭珮瑱. "Hsi Shih''s appearance change in the drama." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/25738746545696659019.
24
Zhuang, Cheng-Han, and 莊承翰. "The Template Updating Mechanism for Discriminating Occlusion and Appearance Change Situations in Tracking." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/69471704779403259942.
Abstract:
碩士國立勤益科技大學
資訊工程系
101
Visual tracking is an important subject in computer vision. Although, there are many algorithms have been proposed to solve various issues in the resent years. There still many issues need to solve. We focus on the issue that the tracked object is during occlusion or appearance change. This is an important issue. Because, the aim of template update is opposite. In general, we do not update the template when tracked object is during occlusion. If the tracked object is during appearance change, we will update the template. Therefore we propose a template update mechanism to discriminate these two situations. The template is updated or not according to the situation of template. Experimental results show that the proposed algorithm is good on number of challenging video clips.
25
Liu, I.-Han, and 劉伊涵. "The Reception and Change in Appearance of Chinese Tradition in the Japanese Military Tale." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4mnv27.
Abstract:
碩士國立臺灣大學
日本語文學研究所
104
This dissertation examines the influence and changes in appearance of The Records of the Grand Historian, Shǐjì (史記,?~87BC) and The History of the Former Han , Hàn shū(漢書,206BC~23AD)in the Heikemonogatari(平家物語).It also studies how classical Chinese literature gived influence to Heikemonogatari , and after that ,how Heigemonogatari used and changed the influence from classical Chinese literature in the contents. Heikemonogatari contains many quotations from classical Chinese literature to use as metaphors. But that sentences that the writer cited are different from classical Chinese literature. The reason that differences are born between Heikemonogatari and classical Chinese literature are the writer received the influence of classical Chinese literature , but Japanese readers considered classical Chinese literature from a different angle to Chinese readers , or the writer adapted the classical Chinese literature just for adjusting the sentences to the context . This dissertation focuses on the sentences cited from classical Chinese historical materials , and analyzes them to clarify the question. Chapter one examines the sentence about Yao’s(堯,2356-2255BC) daughters , Ehuang(娥皇) and Nuying(女英), expecially at “bamboo(斑竹)”. The central mean that Chinese people comprehended is the deep love between husband and wife, but the writer used the other point from the story to be a metaphor in Heikemonogatari. I studied what kind of mean the writer used as the central mean in the story, and why the writer used the mean as a metaphor in the Heikemonogatari. Chapter two examines the sentence about Emperor Gaozu Liu Bong of Han(漢高祖劉邦,247-195B.C.) and Xiang yu (項羽,206-202B.C.). The sentence of Lui Bang is about his words to a surgeon, and the sentence of Xiang Yu is about his farewell to his wife Consort Yu(虞姬).The writer used the dialogue between Liu Bong and a doctor ,and the separation between Xiang yu and Consort Yu as metaphors in the Heikemonogatari. There are many story about Liu Bong and Xiang yu,but the writer only choosed the two. In this chaper, I showed the reason why the writer choosed the two sentences, and what kind of metaphor the two sebtences be worked in the Heikemonotari. Chapter three examines the sentence about the king You of Zou(周幽王,781-771B.C.) and his concubine Bau si (褒姒), and focuses on “the signal fire (烽火)”. Japenese of the Medieval Period liked the poetry of Bai Juyi (白居易,772~846AD). The poem “The vixen of old mound(古塚狐)” is one of Bai Juyi’s poems, and it refered to the story about Bau si. Bau si is a well-known vixen sprite who deluded the king You of Zou and brought the country to go to ruin. “The signal fire” is a story about the king You’ licentious acts and Bau si’ evildoing, but the writer considered the sentence from a different angle, and used the sentence as a different metaphor in Heikemonogatari. I analyze the question in this chapter. Chapter four examines the sentence about Wang Zhaojun(王昭君,50-?B.C.). It focuses on the unhappy and homesick livelihood in Xiongnu(匈奴,an ancient nationality in China). Wang Zhaojun is a woman who married into The Xiongnu(匈奴), and writed as a miserable bride in classical Chinese literature. The Heikemonogatari’s writer used Wang Zhaojun’s story as a metaphor to describe the man who be exiled to foreign land in the Heikemonogatari, and the writer used different ways to complete the description. I analyze the description in this chapter.
26
Gorrila, Anusha. "Data Driven Dense 3D Facial Reconstruction From 3D Skull Shape." Thesis, 2019. http://hdl.handle.net/1805/19940.
Abstract:
Indiana University-Purdue University Indianapolis (IUPUI)This thesis explores a data driven machine learning based solution for Facial reconstruction from three dimensional (3D) skull shape for recognizing or identifying unknown subjects during forensic investigation. With over 8000 unidentified bodies during the past 3 decades, facial reconstruction of disintegrated bodies in helping with identification has been a critical issue for forensic practitioners. Historically, clay modelling has been used for facial reconstruction that not only requires an expert in the field but also demands a substantial amount of time for modelling, even after acquiring the skull model. Such manual reconstruction typically takes from a month to over 3 months of time and effort. The solution presented in this thesis uses 3D Cone Beam Computed Tomography (CBCT) data collected from many people to build a model of the relationship of facial skin to skull bone over a dense set of locations on the face. It then uses this skin-to-bone relationship model learned from the data to reconstruct the predicted face model from a skull shape of an unknown subject. The thesis also extends the algorithm in a way that could help modify the reconstructed face model interactively to account for the effects of age or weight. This uses the predicted face model as a starting point and creates different hypotheses of the facial appearances for different physical attributes. Attributes like age and body mass index (BMI) are used to show the physical facial appearance changes with the help of a tool we constructed. This could improve the identification process. The thesis also presents a methods designed for testing and validating the facial reconstruction algorithm.
27
Wang, Yi-Ting, and 王怡婷. "The Range and Change of Colors on the Appearance Color of Residences in Taiwan–in case of Taoyuan and Tainan Area." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/65393039885719699776.
Abstract:
碩士中原大學
建築研究所
98
Currently, the architecture consists of buildings through the ages in Taiwan. This has resulted in an inconsistent color presentation of the overall architecture. Since Taiwan restoration, what kinds of color change have been made to the appearance of buildings along with the transformation in new eras? Moreover, in people’s mind, which colors have formed the color structure of Taiwan’s architectural environment? Indeed, this study aims to clearly understand the tendency of color change toward the appearance of residential buildings and people’s preferences on the color combination of the appearance of architecture over the years. This research conducted a field investigation, and collected information from market and appearance of the residential buildings and ceramic tile samples from the material manufacturers. The closest Pantone color was obtained through Pantone Color Cue 2 as research data. Besides, a questionnaire of color combination was drafted to conduct an investigation of subjective appraisal of color combination by using SD method. The SPSS 12.0 statistics was used to analyze the above data. The result shows 4 following situations: 1. According to the single variance analysis, the lightness L is significantly different from color b between the eras. Among the factors, the lightness L has the greatest variation. 2. Based on the multiple comparison analysis between two eras, it is found that the color b significantly varies between 1960s and 2000s. 3. There is no significant difference among the lightness L, color a and color b regardless of location(Taoyuan and Tainan), market and manufacturer(two different sources). 4. The interviewees’ gender, age and background have no significant impact on their color preferences or appreciation. The finding of research shows that the change of color on the appearance of the buildings is not significant. Only the lightness has been changed over the years. The colors of the residential buildings are mainly yellow and red. However, the black, grey and white colors have been widely applying on the appearance of the residential architecture in recent years. In addition, the result of questionnaire shows that most of the consumers give a fair rating for the colors of Taiwan’s residential architecture through the ages. This further indicates that the consumers appreciate the architect’s color design on the appearance of the residential buildings to a certain extent. Both of them have a consistent viewpoint toward the ways of color combination.
28
(7023152), Anusha Gorrila. "Data Driven Dense 3D Facial Reconstruction From 3D Skull Shape." Thesis, 2019.
Abstract:
This thesis explores a data
driven machine learning based solution for Facial reconstruction from three
dimensional (3D) skull shape for recognizing or identifying unknown subjects
during forensic investigation. With over 8000 unidentified bodies during the
past 3 decades, facial reconstruction of disintegrated bodies in helping with
identification has been a critical issue for forensic practitioners. Historically,
clay modelling has been used for facial reconstruction that not only requires
an expert in the field but also demands a substantial amount of time for
modelling, even after acquiring the skull model. Such manual reconstruction
typically takes from a month to over 3 months of time and effort. The solution
presented in this thesis uses 3D Cone Beam Computed Tomography (CBCT) data collected
from many people to build a model of the relationship of facial skin to skull
bone over a dense set of locations on the face. It then uses this skin-to-bone
relationship model learned from the data to reconstruct the predicted face model
from a skull shape of an unknown subject. The thesis also extends the algorithm
in a way that could help modify the reconstructed face model interactively to
account for the effects of age or weight. This uses the predicted face model as
a starting point and creates different hypotheses of the facial appearances for
different physical attributes. Attributes like age and body mass index (BMI)
are used to show the physical facial appearance changes with the help of a tool
we constructed. This could improve the identification process. The thesis also presents
a methods designed for testing and validating the facial reconstruction
algorithm.