Object recognition phd thesis

Object recognition phd thesis

Object Recognition Phd Thesis, what is the order of a gcu five paragraoh essay, themedy thesis genesis skin club, gre 5 paragraph essay is a professional essay writing service that offers reasonable prices for high-quality writing, editing, and proofreading. The service is an effective solution for those customers seeking excellent writing quality for less money. We Object Recognition Phd Thesis guarantee % confidentiality and anonymity From an abstract point of view, the thesis aims to push the limits of the appearance based paradigm without using neither figure ground segmentation nor correspondence. The active object recognition method allows the consistent recognition of objects in 3D and therefore overcomes the limits of single view recognition

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Affecting Human Visual Recognition Memory. PhD thesis, University of Nottingham. The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. The version presented here may differ from the published version or from the version of record. Please see the repository url above for details on accessing the published version and note that access may require a subscription.

Thesis submitted to the University of Nottingham for the degree of Doctor of Philosophy. The current thesis investigated the effects of a variety of spatial and temporal factors on visual recognition memory in human adults. Continuous recognition experiments investigated the effect of lag the number of items intervening between study and test on recognition of a variety of stimulus sets common objects, face-like stimuli, fractals, trigramsand determined that recognition of common objects was superior to that of other stimulus types.

This advantage was largely eradicated when common objects of only one class birds were tested. Continuous recognition confounds the number of intervening items with the time elapsed between study and test presentations of stimuli. These factors were separated in an experiment comparing recognition performance at different rates of presentation.

D-prime scores were affected solely by the number of intervening items, suggesting an interference-based explanation for the effect of lag. The role of interference was investigated further in a subsequent experiment examining the effect of interitem similarity on recognition. A higher level of global similarity amongst stimuli was associated with a lower sensitivity of recognition.

An initial study found a recognition advantage for stimuli that were studied and tested in the same peripheral location. However, the introduction of eye-tracking apparatus to verify fixation resulted in the eradication of this effect, suggesting that it was an artefact of uncontrolled fixation.

Translation of both face-like and fractal stimuli between areas of different eccentricity, with different spatial acuities, object recognition phd thesis decrease recognition sensitivity, suggesting a partial positional specificity of visual memory, object recognition phd thesis. These phenomena. were unaffected by ° rotation. When interfering stimuli were introduced between study and test trials, translation invariance at a constant eccentricity broke down.

I would like to extend thanks to all of those who have supervised me during the course of my PhD, object recognition phd thesis, Tim Ledgeway, object recognition phd thesis, Amanda Parker, Alex Easton, object recognition phd thesis, object recognition phd thesis Helen Cassaday. Their advice and support has made it possible for me to complete the PhD, and has been greatly appreciated.

In particular I would like to thank Tim whose approachable and knowledgeable presence has been invaluable, object recognition phd thesis. I am object recognition phd thesis grateful to others within the department who have helped me out with various aspects of my work. Thanks to Prof. Andrew Derrington, whose face-like stimuli and advice I have made use of, Dr. Object recognition phd thesis Vincent, for his assistance with Matlab programming and the art of surviving a PhD, and Gareth Williams, for research assistance and good humour.

I would like to express gratitude to my family. Thanks to Mum, Dad, Ellie, and object recognition phd thesis grandparents, whose encouragement has helped me greatly during the course of the PhD. Finally, a very big thank you to my partner Tina, for intelligent advice and loving support where they were needed.

The candidate performed all experiments and data analysis. It is a broad term that has been proposed to encompass a wide range of different stores and processes, which may or may not be closely related to each other. Memory likely consists of a number of different entities relying on different brain systems. Generally memory may be divided into two subcategories, explicit and implicit memory. Explicit tasks require conscious awareness of the material being retrieved, i.

Declarative memory can be defined as the acquisition, retention and retrieval of knowledge that has been consciously and intentionally remembered N. In addition to this subcategorisation, memory has been divided according to the nature of the material memorised.

Episodic memory is the name given to the storage and recall of information about specific object recognition phd thesis, or episodes, e.

that you had a letter in the post this morning. It is distinguishable from semantic memory, which consists of generalisable facts Tulving,e. Episodic memory is memory for experienced events and usually involves the retrieval of perceptual information in specific spatiotemporal object recognition phd thesis. This type of memory is commonly assayed by one of.

three methods: free recall, cued recall and recognition, object recognition phd thesis. Free recall involves the learning and subsequent uncued retrieval of lists of stimuli. Cued recall is similar, however retrieval is primed with cues, e. the first three letters of a word.

Recognition tests involve simply identifying whether a stimulus has been perceived before or not. Recognition literally means to know again. To recognise is to perceive something as previously known Mandler,although psychological usage of recognition is usually restricted to judgements about the prior occurrence of events and, therefore, episodic memory. Psychological research into recognition memory aims to ascertain how people come to make judgements that an item or event has previously been encountered.

Recognition memory can be divided further into two components: familiarity and episodic recognition. To give an example of this separation, object recognition phd thesis, imagine that you pass someone on your way to work, that you recognise that person as someone you have previously met, but cannot recall who they are or where you met them.

This is the perceptual identification component object recognition phd thesis recognition memory, a judgement based on a feeling of familiarity. This is an example of episodic recognition, because the specific episode of the first encounter is recalled. The first object recognition phd thesis theory of two such processes was proposed by Kintsch but this view has largely been revised since then see Clarys, for a review, object recognition phd thesis.

Sensory integration of stimulus features, or intra-event integration, gives rise to feelings of familiarity, the automatic reactivation of the stimulus representation.

This is contrasted with the elaboration upon the event within a context or within another event that initiates a conscious search. This is proposed to be a controlled process requiring cognitive effort. The two processes are theorised to work in tandem in the recognition of a stimulus, but familiarity is assumed to be faster. Jacoby and Dallas proposed a similar theory, but suggested that previous exposure to a stimulus led to perceptual facilitation, enhancing subsequent recognition familiarity.

Memory is assumed to make use of a combination of attention-demanding conscious processes with automatic processes. The balance would depend on the nature of the task with explicit tasks demanding greater use of conscious processes and implicit tasks making greater use of automatic processes. Tulving studied the relationship between specific states of consciousness and different types of memory, object recognition phd thesis.

He suggested that semantic, procedural and episodic memories could be characterised with different states of consciousness. Noetic consciousness denotes a state in which a person is aware object recognition phd thesis information but not its origin. Explicit episodic recall may thus be associated with autonoetic consciousness, whilst the experience of feelings of familiarity can be thought of as a noetic state of consciousness.

However, whilst the proposed subdivisions of object recognition phd thesis are theoretically useful, there is no doubt that the systems are semidiscrete, with frequent interactions. Semantic memory, for example, presumably develops from individual episodes from episodic memory, which become generalised, object recognition phd thesis. For example, your knowledge that postboxes are red might come from the combination of many episodes in which you saw red postboxes, or perhaps an episode in which you were told that postboxes are red.

Also, whilst it is often useful to view familiarity and episodic recognition within recognition memory as separate, they have been described as shallower and deeper levels of recognition memory. Decisions are made according to the strength of the memory trace, the putative neural change that represents a memory, and the criterion set by the participant. However, object recognition phd thesis, neuroimaging studies e. The hit rate is the proportion of responses to previously seen stimuli that are correctly recognised, and the false alarm rate is.

the proportion of novel stimuli that are incorrectly assumed to be old. Responses based on familiarity were assumed to be more variable and to depend on the criterion for decision adopted by the participant, object recognition phd thesis. To summarise, recognition is a component of episodic, declarative memory that allows the discrimination of familiar and novel experiences. Whilst, historically, there has been some debate over whether recognition memory may be further subdivided into separate familiarity-based and episodic recall components or not, recent evidence from neuroimaging supports the notion of two separate processes.

Human and animal experiments aiming to test recognition memory have used a large number of different tasks, with a corresponding variety of strengths and limitations. This may take the form of a single long study list, followed by a single long list from which items are recognised e. An inevitable factor to be taken account of when examining the results obtained from such memory tasks is serial position. These produce a characteristic U-shaped curve when accuracy is plotted against serial position, an effect that is especially pronounced in long lists, but is observed even.

Serial position must, therefore, be accounted for object recognition phd thesis the inference of further effects of manipulations of the stimuli. Figure 1. When a probe for. recognition matched the first 1 or last 4 item in a list it was recognised more accurately than for recognition at either of the middle list positions.

Figure adapted from Korsnes et al. An alternative method of assessing recognition memory that avoids the serial position effect is the continuous recognition paradigm, introduced by Shepard and Teghtsoonian Whereas previous methods involved learning an isolated block of information, e.

a word list, and subsequently retrieving as much of the information as possible, the continuous recognition task presented participants with a continuing sequence of information, and required their retention of that information throughout the object recognition phd thesis of the experiment by interleaving study and test trials.

procedure aimed to minimise the possibility of rehearsal of the object recognition phd thesis for retention, and maximise interference from previous material. Each of the cards had a three-digit number printed on it, and each number occurred twice in the pack.

The lag, or number of intervening cards between repeats, was manipulated by the experimenter. The ability to manipulate the lag as an independent variable is an important aspect of the procedure, and allows the comparison of recognition after different study-test intervals and different levels of interference, without the confounding influence of the primacy and recency effects observed in list learning.

Shepard and Teghtsoonian made several important findings in their initial experimentation. In a finding that has been much replicated since, they discovered that probability of recognition of items was dependent on lag.

The experimenters also discovered that, in spite of their hopes of studying recognition under a steady state, this was never totally achieved during their experiments. The probability of participants making false alarms was still increasing gradually after trials, although after a certain point the rate of increase was marginal after 40 trials the increase in probability occurred at a rate of 0.

The object recognition phd thesis obtained by plotting recognition accuracy against lag suggested that memory traces decayed over time, and became decreasingly stimulus-specific. Noise, sensory input that is not part of the signal, is assumed to vary randomly over time and have a normal distribution.

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Please Note! Our service is legal and does not Object Recognition Phd Thesis violate any university/college policies. The sample academic papers can be used for the following purposes: to enhance your subject knowledge; to cite references for ideas and numerical data included; to paraphrase the content, in line with your school's academic integrity policy Starting the Essay with a Hook: Hooks for Object Recognition Phd Thesis Essay Introduction Object Recognition Phd Thesis When you get the task to write an essay, professors expect you to follow the specifics of that type of essay. However, regardless of the essay type or the specific requirements of your instructor, each essay should start with a hook Region Detection and Matching for Object Recognition Jaechul Kim, Ph.D. The University of Texas at Austin, Supervisor: Kristen Grauman In this thesis, I explore region detection and consider its impact on image matching for exemplar-based object recognition. Detecting regions is important to provide semantically meaningful spatial cues in images