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Relevant bibliographies by topics / Pattern perception / Dissertations / Theses

Dissertations / Theses on the topic 'Pattern perception'

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Published: 4 June 2021

Last updated: 30 July 2024

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1

Malyan, R. R. "Machine learning for handprinted character perception." Thesis, Kingston University, 1989. http://eprints.kingston.ac.uk/20527/.

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Humans are well suited to the reading of textual information, but unfortunately it has not yet been possible to develop a machine to emulate this form of human behaviour. In the past, machines have been characterised by having static forms of specific knowledge necessary for character recognition. The resulting form of reading behaviour is most uncharacteristic of the way humans perceive textual information. The major problem with handprinted character recognition is the infinite variability in the character shapes and the ambiguities many of these shapes exhibit. Human perception of handprinted characters makes extensive use of "world knowledge" to remove such ambiguities. Humans are also continually modifying their world knowledge to further enhance their reading behaviour by acquiring new knowledge as they read. An information processing model for perception and learning of handprinted characters is proposed. The function of the model is to enable ambiguous character descriptions to converge to single character classifications. The accuracy of this convergence improves with reading experience on handprinted text. The model consists of three compon,ent parts. Firstly, a character classifier to recognise character patterns. These patterns may be both distorted anq noisy, where distortion is defined to be a consistent variability from known archetypical character descriptions and noise as a random inconsistent variability in character shape. Secondly, a perceptive mechanism that makes inferences from an incomplete linguistic world model of an author or of a specific domain of discourse from many authors. Finally, a incremental learning capability is integrated into the character classifier and perceptive mechanisms. This is to enable the internal world model to be continually adaptive to either changes in the domain of discourse or to different authors. A demonstrator is described, together with a summary of experimental results that clearly show the improvement in machine perception which results from continuous incremental learning.

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2

Lorek, Edward J. "An investigation of sex differences in spatial cognition predicted by the hunter-gatherer hypothesis using a human analog of the pole-box task." Click here for download, 2006. http://wwwlib.umi.com/cr/villanova/fullcit?p1432522.

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3

Cham, Siu-lai Joey, and 覃紹禮. "Human vision and the natural visual world: psychophysical results and natural-image analysis reveal comparableand consistent patterns of contour-curvature statistics." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41758079.

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4

Cham, Siu-lai Joey. "Human vision and the natural visual world psychophysical results and natural-image analysis reveal comparable and consistent patterns of contour-curvature statistics /." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41758079.

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5

Leung, Ka-chung, and 梁嘉聰. "Distortion modelling for the recognition of line patterns." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46583105.

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6

Pigott, Susan. "Visual pattern memory after unilateral anterior temporal lobectomy." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74287.

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Memory for visual patterns was examined in 131 patients with unilateral temporal- or frontal-lobe excisions and 32 normal control subjects. A deficit in short-term memory for matrices of increasing complexity was exhibited by the right frontal-lobe group. Right temporal lobectomy impaired cued recall of visually homogeneous matrices at each of four serial positions. On the delayed recognition of complex visual scenes, right temporal lobectomy decreased identification of changes in figurative detail and spatial composition, whereas right hippocampectomy impaired identification of changes in spatial location. The interplay between verbal and pictorial codes in memory was also investigated using related word-design pairs. Right or left temporal lobectomy affected the number of designs recalled but only the right temporal-lobe group produced designs of poor quality. When cued with the words, the left temporal-lobe group produced fewer designs than the control subjects, demonstrating a reduced ability to retrieve pictorial information through verbal labels.

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7

Don, Audrey Jean. "Auditory pattern perception in children with Williams syndrome." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ30287.pdf.

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8

Hodgson, Anthony Malcolm. "Time, pattern, perception : integrating systems and futures thinking." Thesis, University of Hull, 2016. http://hydra.hull.ac.uk/resources/hull:16878.

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9

Fraser, Ian Hamilton. "Temporal discrimination and integration in visual pattern perception." Thesis, University of Aberdeen, 1986. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU003837.

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The literature on models of pattern recognition was reviewed and it was revealed that there is a paucity of information concerning temporal factors and their effects on pattern perception. A method for ivestigating these aspects was outlined which entails the fragmentation of a stimulus and its presentation over time. This type of stimulus presentation has revealed that the visual system appears to harbour biases towards parsing the internal or external features from the outline. In addition there were perceptual advantages in terms of processing speed and fewer errors when the outline occurred first in the sequence of stimulus fragments. Both of these biases appear strongest when meaningful as opposed to non-representational stimuli are used. It was concluded that these results can be best explained in terms of a two stage processing model. The first stage involves a process of building up an internal representation (much along the lines of David Marr's model). The second stage involves a cognitively driven scanning process which compares the representation with the items in the subject's picture vocabulary. This scanning process is probably hierarchically organised.

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10

Poisson, Marie E. "Studies in visual search : effects of distractor ratio and local grouping processes." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70299.

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According to Feature Integration Theory (Treisman & Gelade, 1980), search for a target defined by features on two different dimensions (e.g. green horizontal target among red horizontal and green vertical distractors) is conducted via serial attentive search of all items in the array. Results presented in this thesis clearly demonstrate that conjunction search is not conducted as a serial self-terminating search, and suggest that subjects selectively search a single feature set. Strong support is also provided for the role of local grouping processes in visual conjunction search. This includes evidence demonstrating: (1) that local context is an important factor in directing search toward the target, and (2) that groups of spatially adjacent homogeneous elements can be processed in parallel. These results point to the importance of spatial layout of target and distractor elements. More recent theories (e.g. Cave & Wolfe, 1990) will have to be amended in order to account for these data.

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11

Lunken, Eugene Jonah. "Is subitizing simply canonical pattern matching." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/29426.

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12

Bishop, J. M. "Anarchic techniques for pattern classification." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234667.

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13

Yan, Wing-fai. "Eye movement measurement for clinical applications using pattern recognition /." [Hong Kong : University of Hong Kong], 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12434024.

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14

Wages, Mark A. "Pattern in composition of the visual arts." Virtual Press, 1998. http://liblink.bsu.edu/uhtbin/catkey/1115757.

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This creative project dealt with the development of pattern as it relates to composition. A variety of methods of developing pattern were utilized: stenciling, transfer, and Macromedia Freehand. This assortment of applications provided for a broad exploration of pattern making. The artist also conducted in-depth research of artists who incorporated pattern into their work.As a result of the project, the artist increased his comprehension of the capabilities of pattern in picture making. An additional insight about the disappearance of the pattern format was also attained through research of the pattern movement. The writer identified an under-utilized method of depiction that is likely to be resurrected and developed. This research is artistically relevant in that it recognizes a compositional method that was prematurely abandoned and is worthy of re-exploration.
Department of Art

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15

Peterson, Scott. "Analyzing the component processes of visual enumeration." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/28945.

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16

Parent, Pierre 1953. "Trace inference, curvature consistency, and curve detection." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66100.

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17

Höhn, Winfried. "Mustererkennung in Frühdrucken Pattern Perception in Early Printed Books /." Würzburg : Univ. Würzburg, Inst. für Informatik, Lehrstuhl für Informatik II, 2006. http://www.opus-bayern.de/uni-wuerzburg/volltexte/2008/3042/.

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18

Thorpe, Michael J. A. "The perception of transformed auditory and visual pattern structure : an exploration of supramodal pattern space." Thesis, University of Roehampton, 2016. https://pure.roehampton.ac.uk/portal/en/studentthesis/the-perception-of-transformed-auditory-and-visual-pattern-structure(8ae8e1e1-8893-4190-b3f9-5c22e550e1f6).html.

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The present thesis is broadly concerned with the processing of structural information. More specifically, it investigates the possibility that auditory pitch patterns share, at some level, supramodal structural representations and processes with visuo-spatial patterns. The motivation for the research was provided by a number of areas of psychological research that are brought together and discussed in this thesis, and which inform the development of a new theoretical framework that conceives of a supramodal pattern space (SPS). According to the SPS framework, auditory and visual patterns can be represented in equivalent ‘1!-D’ supramodal pattern spaces. A series of experiments was devised to test the assumptions of the SPS framework, by means of analysing the perception of two types of structural transformation: inverse and retrograde. The main hypothesis that was tested in all experiments predicted a processing advantage for inverse transformations when patterns corresponded to 1!-D supramodal pattern space. Support for the hypothesis was provided by experiments adopting a short-term recognition paradigm. However, contrasting results were revealed by experiments adopting a structural priming paradigm, which did not support the hypothesis. It was concluded that different processing strategies were used depending on the task demands. The findings were discussed with relation to theories of sequential pattern learning, melodic perception and brain organisation.

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19

Fish, Jonathan C. "How sketches work : a cognitive theory for improved system design." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/7418.

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Evidence is presented that in the early stages of design or composition the mental processes used by artists for visual invention require a different type of support from those used for visualising a nearly complete object. Most research into machine visualisation has as its goal the production of realistic images which simulate the light pattern presented to the retina by real objects. In contrast sketch attributes preserve the results of cognitive processing which can be used interactively to amplify visual thought. The traditional attributes of sketches include many types of indeterminacy which may reflect the artist's need to be "vague". Drawing on contemporary theories of visual cognition and neuroscience this study discusses in detail the evidence for the following functions which are better served by rough sketches than by the very realistic imagery favoured in machine visualising systems. 1. Sketches are intermediate representational types which facilitate the mental translation between descriptive and depictive modes of representing visual thought. 2. Sketch attributes exploit automatic processes of perceptual retrieval and object recognition to improve the availability of tacit knowledge for visual invention. 3. Sketches are percept-image hybrids. The incomplete physical attributes of sketches elicit and stabilise a stream of super-imposed mental images which amplify inventive thought. 4. By segregating and isolating meaningful components of visual experience, sketches may assist the user to attend selectively to a limited part of a visual task, freeing otherwise over-loaded cognitive resources for visual thought. 5. Sequences of sketches and sketching acts support the short term episodic memory for cognitive actions. This assists creativity, providing voluntary control over highly practised mental processes which can otherwise become stereotyped. An attempt is made to unite the five hypothetical functions. Drawing on the Baddeley and Hitch model of working memory, it is speculated that the five functions may be related to a limited capacity monitoring mechanism which makes tacit visual knowledge explicitly available for conscious control and manipulation. It is suggested that the resources available to the human brain for imagining nonexistent objects are a cultural adaptation of visual mechanisms which evolved in early hominids for responding to confusing or incomplete stimuli from immediately present objects and events. Sketches are cultural inventions which artificially mimic aspects of such stimuli in order to capture these shared resources for the different purpose of imagining objects which do not yet exist. Finally the implications of the theory for the design of improved machine systems is discussed. The untidy attributes of traditional sketches are revealed to include cultural inventions which serve subtle cognitive functions. However traditional media have many short-comings which it should be possible to correct with new technology. Existing machine systems for sketching tend to imitate nonselectively the media bound properties of sketches without regard to the functions they serve. This may prove to be a mistake. It is concluded that new system designs are needed in which meaningfully structured data and specialised imagery amplify without interference or replacement the impressive but limited creative resources of the visual brain.

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20

甄榮輝 and Wing-fai Yan. "Eye movement measurement for clinical applications using pattern recognition." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31209026.

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21

Or, Chun-fai Charles. "The interaction of motion and form in the perception of global structure a glass-pattern study /." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36225009.

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22

Or, Chun-fai Charles, and 柯駿輝. "The interaction of motion and form in the perception of global structure: a glass-pattern study." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B36225009.

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23

Avdiyenko, Liliya. "Adaptive sequential feature selection in visual perception and pattern recognition." Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-153417.

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In the human visual system, one of the most prominent functions of the extensive feedback from the higher brain areas within and outside of the visual cortex is attentional modulation. The feedback helps the brain to concentrate its resources on visual features that are relevant for recognition, i. e. it iteratively selects certain aspects of the visual scene for refined processing by the lower areas until the inference process in the higher areas converges to a single hypothesis about this scene. In order to minimize a number of required selection-refinement iterations, one has to find a short sequence of maximally informative portions of the visual input. Since the feedback is not static, the selection process is adapted to a scene that should be recognized. To find a scene-specific subset of informative features, the adaptive selection process on every iteration utilizes results of previous processing in order to reduce the remaining uncertainty about the visual scene. This phenomenon inspired us to develop a computational algorithm solving a visual classification task that would incorporate such principle, adaptive feature selection. It is especially interesting because usually feature selection methods are not adaptive as they define a unique set of informative features for a task and use them for classifying all objects. However, an adaptive algorithm selects features that are the most informative for the particular input. Thus, the selection process should be driven by statistics of the environment concerning the current task and the object to be classified. Applied to a classification task, our adaptive feature selection algorithm favors features that maximally reduce the current class uncertainty, which is iteratively updated with values of the previously selected features that are observed on the testing sample. In information-theoretical terms, the selection criterion is the mutual information of a class variable and a feature-candidate conditioned on the already selected features, which take values observed on the current testing sample. Then, the main question investigated in this thesis is whether the proposed adaptive way of selecting features is advantageous over the conventional feature selection and in which situations. Further, we studied whether the proposed adaptive information-theoretical selection scheme, which is a computationally complex algorithm, is utilized by humans while they perform a visual classification task. For this, we constructed a psychophysical experiment where people had to select image parts that as they think are relevant for classification of these images. We present the analysis of behavioral data where we investigate whether human strategies of task-dependent selective attention can be explained by a simple ranker based on the mutual information, a more complex feature selection algorithm based on the conventional static mutual information and the proposed here adaptive feature selector that mimics a mechanism of the iterative hypothesis refinement. Hereby, the main contribution of this work is the adaptive feature selection criterion based on the conditional mutual information. Also it is shown that such adaptive selection strategy is indeed used by people while performing visual classification.

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24

Nagel, Karin Lynne. "Training visual pattern recognition : using worked examples to aid schema acquisition." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/28851.

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25

Tao, Yu. "Feature extraction in pattern recognition and document analysis by fractal and wavelet." HKBU Institutional Repository, 2001. http://repository.hkbu.edu.hk/etd_ra/284.

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26

Feng, Li. "Wavelet approach to feature extraction for recognition of 2-D objects." HKBU Institutional Repository, 1999. http://repository.hkbu.edu.hk/etd_ra/260.

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27

Shah, Shishir Kirit. "Probabilistic multifeature/multisensor integration for automatic object recognition /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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28

Çetin, Özgür. "Multi-rate modeling, model inference, and estimation for statistical classifiers /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/5849.

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29

De, Bruijn Oscar. "The exterior-letter advantage in linear multi-letter arrays." Thesis, University of St Andrews, 1995. http://hdl.handle.net/10023/14596.

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When linear arrays of unrelated letters (e.g., 'sfdthnc') are presented tachistoscopically centred across a fixation point, letters presented at exterior positions (e.g., 's----c') aregenerally reported more accurately than letters presented in interior positions. This "exterior-letter advantage" suggests that processing is more efficient for exterior letters than for interior letters. Previous researchers have argued that the exterior-letter advantage can be fully accounted for by the influences of lateral interference and mask configuration. However, the processes responsible for the exterior-letter advantage are far from resolved, despite the robustness of the phenomenon and its occurrence in numerous investigations into visual information processing. The experiments reported in this study investigated the role of lateral interference and backward pattern masking in the exterior-letter advantage. To investigate the role of lateral interference, performance was compared across complete 7-letter arrays and arrays in which the presence and proximity of flanking letters was varied by (i) presenting only exterior letters and their immediately flanking interior letter, (ii) varying the number blank letter-spaces by which these letter-pairs were separated, (iii) varying the nature of the characters presented in these displays, and (iv) presenting each exterior/interior letter-pair in isolation. The role of backward pattern masking was investigated (i) using different mask configurations which either matched or exceeded the left and right boundaries of complete letter arrays, and (ii) using masks which overlay only the positions of each exterior/interior letter-pair. The findings indicate that while lateral interference and mask configuration each played a part, neither an imbalance in the number of immediately flanking letters for interior and exterior letters nor mask configuration can entirely account for the exterior-letter advantage.

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30

Canic, Michael John. "Perceptual and response organization of rhythmic patterns." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28633.

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Four studies were undertaken to investigate the advance planning and perception of simple rhythmic patterns. Subjects listened to patterns of identical, computer-generated tones and then reproduced them as accurately as possible by tapping on a single response key. Section One focussed on the advance planning of isochronous rhythmic patterns in which subjects performed the additional task of initiating pattern reproduction as quickly as possible. In Experiment 1, subjects listened to patterns of one to six tones with interstimulus intervals (ISIs) of 300 ms. The reproduction phase involved no stimulus uncertainty. Reaction time (RT) was found to increase linearly with number of response events. Advance planning thus occurs for patterns reproduced as slow as 300 ms per response event. Stimulus uncertainty is not a necessary condition for RT to increase with response complexity. In Experiment 2, subjects reproduced patterns of one to eight tones with ISIs of 200, 400, 600, and 800 ms. A linear RT trend was found only at the 200-ms rate. Patterns slower than this rate did not display "response coherence". Patterns at the 200-ms and 400-ms rates showed evidence of grouping through the accenting of first and last intervals. These patterns' displayed "perceptual coherence". Section Two focussed on the perceptual organization of patterns in which pattern structures could suggest the grouping of events as two equal-duration intervals. In Experiment 3, subjects reproduced two series of patterns, one series in which the suggested grouping-intervals were initiated by external-world events, and one in which they were not. Pattern structures in the latter series were not suggestive enough to induce grouping of events as two equal-duration intervals. Patterns were instead grouped as two intervals of unequal duration showing that the relative temporal positions of external-world events dominates in simple perceptual grouping. Experiment 4 investigated the upper temporal limit of perceptual grouping intervals and the influence of number of group constituents. Results showed that perceptual grouping of events that span more than 1800 ms is seldom accomplished and that grouping occurs when intervals contain up to seven constituents.
Graduate and Postdoctoral Studies
Graduate

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31

Cartwright, Paul. "Realisation of computer generated integral three dimensional images." Thesis, De Montfort University, 2000. http://hdl.handle.net/2086/13289.

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32

Love, Diana Bonham. "The relationship of tempo, pattern length, and grade level on the recognition of rhythm patterns." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/77909.

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The purpose of this study was to investigate the effects of tempo, pattern length, and grade level on student ability to recognize rhythm patterns. It was intended that the study would also determine if age and experience are factors which affect rhythm recognition and memory. A 48 item Rhythm Pattern Identification (RPI) test was administered to 2146 band students and 114 nonmusic students in grades 6 through 12. The RPI consisted of 48 pairs of rhythm patterns varied in time length (seconds), number of note values (sound events), and tempo. Students indicated if the pairs of rhythm patterns were the same or different. Statistical analysis indicated the reliability estimate (KR-20) of the RPI to range from .445 to .792 with the median being .553. Criterion related validity was established through a correlation of student scores on the Iowa Tests of Music Literacy (Gordon, 1970) and the RPI, r = .39. A multiple regression analysis of the data indicated that .36 of the variance in the RPI scores was attributable to the linear combination of tempo, length in seconds, number of sound events, and grade level. As expected, the independent variables of length in seconds and length in sound events were significantly correlated R = .63; however, there were no significant correlations between the other independent variables. Inverse relationships were found between tempo and score and length and score. Beta weights indicated that the number of sound events was the most significant influence on student scores. Data indicated a slight increase in score from one grade level to the next with significant differences occurring between grades six and eleven and twelve and between grades seven and eleven and twelve. The results of the study indicate that length of pattern in seconds, number of sound events, tempo, and grade level all affect memory of rhythm patterns. These findings corroborate with those of Dowling (1973), Sink (1983), and Fraisse (1982). The implications for music education are: (1) tempo may be a factor that influences how students learn rhythm and (2) student perception of rhythm may be more affected by the length of the rhythm pattern in the number of sound events rather than the length of a pattern in seconds. Future research should include further investigation of young students ability to comprehend rhythm patterns. It is evident that young students can perceive and recognize as complex patterns as older students.
Ed. D.

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33

Power, Conrad. "Hierarchical fuzzy pattern matching for the regional comparison of land use maps." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0005/MQ42427.pdf.

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Brown, John Anthony, and John Brown@anu edu au. "The pattern of memory and perceptual dysfunctions in recreational ecstasy users." The Australian National University. Faculty of Science, 2006. http://thesis.anu.edu.au./public/adt-ANU20060407.155643.

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There is a growing body of evidence that the main psychoactive ingredient of the recreational drug ecstasy (methylendioxymethamphetamine; MDMA) causes lasting changes to the serotonin system in both animals and humans, including the hippocampus (involved in memory) and the occipital lobe (involved in visual perception). Previous studies have often found memory deficits in ecstasy users. However, the results have been far from consistent across studies. None of the methods used to date have adequately isolated the hippocampal component of memory from the contribution of other brain regions. Three memory studies were conducted in this thesis to clarify which components and processes of memory are in deficit in ecstasy users.¶ In the first memory study, ecstasy users (n=32) did not differ from non-drug using controls (n=29) on implicit memory (automatic non-conscious retrieval, as revealed by a stem-completion task), or explicit memory (conscious recollection, as revealed by stem-cued recall). In the second memory study, no significant differences were found between ecstasy users (n=30) and non-drug using controls (n=34) on tests designed to clarify the findings on explicit memory, or on two standard neuropsychological tests of long-term memory (prose recall and Auditory Verbal Learning Test) that allowed greater use of elaborative processing at study. In the third memory study, a number of tests were applied that differed in their elaborative processing demands, including the California Verbal Learning Test, Visual Paired Associates, and Verbal Paired Associates. Ecstasy users (n=32) had poorer recall, and made less strategic use of elaborative processing compared to both cannabis-using controls (n=33) and non-drug using controls (n=33). Also, on a novel test of elaborative processing (Verbal Triplet Associates), both cannabis users and ecstasy users had memory deficits on the first trial, but only ecstasy users had a significant learning deficit over successive trials. On the basis of the localisation of the components and processes of memory in literature, it was concluded that long-term memory deficits in ecstasy users may reflect changes in elaborative processes localised in the frontal lobes, or global deficits, rather than just changes to the memory functions of the hippocampus.¶ With regard to visual perception, no studies have been published to date that have examined MDMA-related changes to the behavioural functioning of the occipital lobe in humans. In the current thesis, this was investigated using the tilt aftereffect illusion. In accordance with expectations, ecstasy users had a larger tilt aftereffect compared to non-drug using controls (n=34). Unexpectedly, this result was only obtained for a subset of 12 ecstasy users (out of n=30) who had not used amphetamines in the recent past. It was concluded that the results for ecstasy users who had not recently used amphetamines were consistent with the proposal that ecstasy-related serotonergic changes in the occipital lobe broaden the tuning bandwidth of orientation sensitive neurons, and that the recent use of amphetamines appears to counteract that effect.

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Gaston, Elizabeth Ann. "The inter-relatedness of knitted fabric, pattern and colour in the perception of pattern in Fair Isle knitted fabrics." Thesis, University of Leeds, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694648.

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Producing coloured stripes in Fair Isle knit creates complex colour interactions, where changing one colour in a design can dramatically change the viewer's perception of the pattern. This can be explained in part through established colour and pattern theory, and the most interesting effects occur when colour theory interacts with pattern theory to cause figural ambiguity, or to disrupt the Gestalt principles of "belongingness" (Kanizsa, 1979). The originality of this work stems from situating the theoretical exploration in the unique structure of Fair Isle knitted fabrics. The research utilises a design methodology, which recognises the importance of tacit knowledge, intuition and creativity. It suggests metrics to assess the success of the research and communication methods that are appropriate to a design audience. Outcomes of the research include results for formal experiments, exhibitions and collaborative, performance workshops, confirming and explaining the inter-relatedness of knitted fabric, pattern and colour in the perception of Fair Isle knitted fabrics. The research identifies Performance Craft, a new concept for design research and dissemination.

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36

Quinn, John R. Hrebien Leonid. "Development of a pattern recognition approach for analyzing flow cytometric data /." Philadelphia, Pa. : Drexel University, 2006. http://dspace.library.drexel.edu/handle/1860%20/843.

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37

Zhang, Shujun. "Model-based 3D object perception from single monochromatic images of unknown environments." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315501.

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38

Esterhuizen, Gerhard. "Generalised density function estimation using moments and the characteristic function." Thesis, Link to the online version, 2003. http://hdl.handle.net/10019.1/1001.

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39

Arriola, Yosu. "Integration of multi-layer perception and hidden Markov models for automatic speech recognition." Thesis, Staffordshire University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292239.

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Nees, Michael A. "Data Density and Trend Reversals in Auditory Graphs: Effects on Point Estimation and Trend Identification Tasks." Thesis, Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-02262007-105538/.

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Field, Christopher. "OUR FATHERS, OUR BROTHERS, OURSELVES: ILLUSORY PATTERN PERCEPTION AND THE PROGRESSION OF TRAUMA THEORY." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/dissertations/1067.

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The dissertation argues that depictions of cultural trauma in literature are a natural progression from depictions of individual trauma by tracing the development of trauma studies from its roots in Freudian psychoanalysis to its current position as an interdisciplinary field of study. It accomplishes this by focusing on one symptom of Posttraumatic Stress Disorder, a tendency to perceive illusory patterns - patterns that do not really exist, such as conspiracy theories - in response to feelings of helplessness that stem from a traumatic event. This study contends that depictions of illusory pattern perceptions, while they may initially suggest a simple and definitive answer to healing from the traumatic event if the individual can fully grasp the pattern and get others to see it, actually demonstrate an extension of the trauma by forcing the individual to continuously relive it. Through the use of poetry, fiction, film, and graphic novels from three lingering national crises - a chapter each for the Kennedy assassination, the Vietnam War, and 9/11 - this study demonstrates that the perception of an illusory pattern is a simplistic attempt to deal with the ramifications of a traumatic event which must be dismissed in favor of embracing the complexities of the trauma in order to move beyond it. Finally, in the conclusion this study argues that depictions of memorials in literature can serve as a positive alternative to the destructive force of illusory pattern perception.

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Higson, Neil. "An innovative approach to visuo-perceptual testing using image analysis and pattern recognition techniques." Thesis, University of Kent, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242909.

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Achuthanandam, Ramasubramaniam Kam Moshe Hrebien Leonid. "Identifying regions of difference in flow cytometric data /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/730.

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施雷 and Lui Sze. "Computer recognition of printed Chinese characters." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31213601.

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Peterson, Michael R. "EC-Facilitated Cosine Classifier Optimization as Applied to Protein Solvation." Wright State University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=wright1166729846.

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Shi, Qiquan. "Low rank tensor decomposition for feature extraction and tensor recovery." HKBU Institutional Repository, 2018. https://repository.hkbu.edu.hk/etd_oa/549.

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Feature extraction and tensor recovery problems are important yet challenging, particularly for multi-dimensional data with missing values and/or noise. Low-rank tensor decomposition approaches are widely used for solving these problems. This thesis focuses on three common tensor decompositions (CP, Tucker and t-SVD) and develops a set of decomposition-based approaches. The proposed methods aim to extract low-dimensional features from complete/incomplete data and recover tensors given partial and/or grossly corrupted observations.;Based on CP decomposition, semi-orthogonal multilinear principal component analysis (SO-MPCA) seeks a tensor-to-vector projection that maximizes the captured variance with the orthogonality constraint imposed in only one mode, and it further integrates the relaxed start strategy (SO-MPCA-RS) to achieve better feature extraction performance. To directly obtain the features from incomplete data, low-rank CP and Tucker decomposition with feature variance maximization (TDVM-CP and TDVM-Tucker) are proposed. TDVM methods explore the relationship among tensor samples via feature variance maximization, while estimating the missing entries via low-rank CP and Tucker approximation, leading to informative features extracted directly from partial observations. TDVM-CP extracts low-dimensional vector features viewing the weight vectors as features and TDVM-Tucker learns low-dimensional tensor features viewing the core tensors as features. TDVM methods can be generalized to other variants based on other tensor decompositions. On the other hand, this thesis solves the missing data problem by introducing low-rank matrix/tensor completion methods, and also contributes to automatic rank estimation. Rank-one matrix decomposition coupled with L1-norm regularization (L1MC) addresses the matrix rank estimation problem. With the correct estimated rank, L1MC refines its model without L1-norm regularization (L1MC-RF) and achieve optimal recovery results given enough observations. In addition, CP-based nuclear norm regularized orthogonal CP decomposition (TREL1) solves the challenging CP- and Tucker-rank estimation problems. The estimated rank can improve the tensor completion accuracy of existing decomposition-based methods. Furthermore, tensor singular value decomposition (t-SVD) combined with tensor nuclear norm (TNN) regularization (ARE_TNN) provides automatic tubal-rank estimation. With the accurate tubal-rank determination, ARE_TNN relaxes its model without the TNN constraint (TC-ARE) and results in optimal tensor completion under mild conditions. In addition, ARE_TNN refines its model by explicitly utilizing its determined tubal-rank a priori and then successfully recovers low-rank tensors based on incomplete and/or grossly corrupted observations (RTC-ARE: robust tensor completion/RTPCA-ARE: robust tensor principal component analysis).;Experiments and evaluations are presented and analyzed using synthetic data and real-world images/videos in machine learning, computer vision, and data mining applications. For feature extraction, the experimental results of face and gait recognition show that SO-MPCA-RS achieves the best overall performance compared with competing algorithms, and its relaxed start strategy is also effective for other CP-based PCA methods. In the applications of face recognition, object/action classification, and face/gait clustering, TDVM methods not only stably yield similar good results under various multi-block missing settings and different parameters in general, but also outperform the competing methods with significant improvements. For matrix/tensor rank estimation and recovery, L1MC-RF efficiently estimates the true rank and exactly recovers the incomplete images/videos under mild conditions, and outperforms the state-of-the-art algorithms on the whole. Furthermore, the empirical evaluations show that TREL1 correctly determines the CP-/Tucker- ranks well, given sufficient observed entries, which consistently improves the recovery performance of existing decomposition-based tensor completion. The t-SVD recovery methods TC-ARE, RTPCA-ARE, and RTC-ARE not only inherit the ability of ARE_TNN to achieve accurate rank estimation, but also achieve good performance in the tasks of (robust) image/video completion, video denoising, and background modeling. This outperforms the state-of-the-art methods in all cases we have tried so far with significant improvements.

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Wong, Vincent. "Human face recognition /." Online version of thesis, 1994. http://hdl.handle.net/1850/11882.

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Soukhoroukova, Nadejda. "Data classification through nonsmooth optimization." Thesis, University of Ballarat [Mt. Helen, Vic.] :, 2003. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/42220.

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Yu, Ping. "FP-tree Based Spatial Co-location Pattern Mining." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4724/.

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A co-location pattern is a set of spatial features frequently located together in space. A frequent pattern is a set of items that frequently appears in a transaction database. Since its introduction, the paradigm of frequent pattern mining has undergone a shift from candidate generation-and-test based approaches to projection based approaches. Co-location patterns resemble frequent patterns in many aspects. However, the lack of transaction concept, which is crucial in frequent pattern mining, makes the similar shift of paradigm in co-location pattern mining very difficult. This thesis investigates a projection based co-location pattern mining paradigm. In particular, a FP-tree based co-location mining framework and an algorithm called FP-CM, for FP-tree based co-location miner, are proposed. It is proved that FP-CM is complete, correct, and only requires a small constant number of database scans. The experimental results show that FP-CM outperforms candidate generation-and-test based co-location miner by an order of magnitude.

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Vavatzanidis, Niki K., Dirk Mürbe, Angela D. Friederici, and Anja Hahne. "The Perception of Stress Pattern in Young Cochlear Implanted Children: An EEG Study." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-203704.

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Children with sensorineural hearing loss may (re)gain hearing with a cochlear implant—a device that transforms sounds into electric pulses and bypasses the dysfunctioning inner ear by stimulating the auditory nerve directly with an electrode array. Many implanted children master the acquisition of spoken language successfully, yet we still have little knowledge of the actual input they receive with the implant and specifically which language sensitive cues they hear. This would be important however, both for understanding the flexibility of the auditory system when presented with stimuli after a (life-) long phase of deprivation and for planning therapeutic intervention. In rhythmic languages the general stress pattern conveys important information about word boundaries. Infant language acquisition relies on such cues and can be severely hampered when this information is missing, as seen for dyslexic children and children with specific language impairment. Here we ask whether children with a cochlear implant perceive differences in stress patterns during their language acquisition phase and if they do, whether it is present directly following implant stimulation or if and how much time is needed for the auditory system to adapt to the new sensory modality. We performed a longitudinal ERP study, testing in bimonthly intervals the stress pattern perception of 17 young hearing impaired children (age range: 9–50 months; mean: 22 months) during their first 6 months of implant use. An additional session before the implantation served as control baseline. During a session they passively listened to an oddball paradigm featuring the disyllable “baba,” which was stressed either on the first or second syllable (trochaic vs. iambic stress pattern). A group of age-matched normal hearing children participated as controls. Our results show, that within the first 6 months of implant use the implanted children develop a negative mismatch response for iambic but not for trochaic deviants, thus showing the same result as the normal hearing controls. Even congenitally deaf children show the same developing pattern. We therefore conclude (a) that young implanted children have early access to stress pattern information and (b) that they develop ERP responses similar to those of normal hearing children.

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