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Friday, July 31, 2020 | History

2 edition of effects of viewpoint on object recognition found in the catalog.

effects of viewpoint on object recognition

Rebecca Lawson

effects of viewpoint on object recognition

by Rebecca Lawson

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  • 9 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D) - University of Birmingham, School of Psychology.

Statementby Rebecca Lawson.
ID Numbers
Open LibraryOL21123362M

In a sense, categorization may relate to recognition at a basic or entry level described by Roch (Rosch et al., ), while identification may be more closely related subordinate-level recognition. Object recognition at basic level (e.g., deciding a shape is a dog) are not affected by changes in viewpoint, while subordinate-level decisions (e. do: another view of the same object may turn out to be less similar to the stored view than to a view of a different object, leading to an erroneous recognition. As noted above, contemporary theoretical treatments of recognition concentrate precisely on this problem; state of the art algorithms [18] are capable of overcoming it, provided that.

Viewpoint dependent recognition of familiar faces February 1, 2 Abstract The question of whether object representations in the human brain are object-centered or viewer-centered has motivated a variety of experiments with divergent results. A key issue concerns the visual recognition of objects seen from novel views. If recognition perfor-. Book: idea that humans have a special mechanism for own face. Is Fave Recognition "Special": ___ view - supported by dissociations between object and face recognition. Patient's with intact object recognition, but impaired face recognition. special mechanism view.

Multi-view images can help improve the recognition performance. If the object is not visible in one view, it may be visible in another view; this is the motivation for multiple views for human screeners as well. We show that multi-view recognition indeed improves recognition, especially when the single view detections are not very good, as also. color’s influence on object recognition and to reconcile these results with traditional theories of object recognition. Section 2 contains a historical overview of the claims made between strucutral (i.e., edge) and view-point dependent (i.e., surface + edge) characterizations of object recognition.


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Effects of viewpoint on object recognition by Rebecca Lawson Download PDF EPUB FB2

In this sense, recognition of objects will always be affected by changes in viewpoint early on in the visual processing stream, but these effects will taper off with time. At later visual processing stages, some types of perceptual goals such as object identification or parity discrimination, will require additional processing operations which will give rise to viewpoint dependent effects of viewpoint on object recognition book Cited by: 3.

1 Introduction Despite the apparent ease with which observers recognise and interact with objects in a dynamic environment, there are measurable effects of changing viewing conditions (eg viewing distance, perspective, lighting) on the speed and/or accuracy of recognition performance. One important parameter that affects recognition is the perspective view- point from which an object is first Cited by: 8.

On the whole, people recognize objects best when they see the objects from a familiar view and worse when they see the objects from views that were previously occluded from sight. Unexpectedly, we found haptic object recognition to be viewpoint-specific as well, even though hand movements were unrestricted.

This viewpoint dependence was due to the hands preferring the back “view” of the by: Objective: To examine the effect of viewpoint and visual texture on visual object recognition in mild cognitive impairment (MCI) or dementia due to DLB or AD.

Background: Visual recognition of objects relies not only on their shape but also on their color or texture. When shape is not perceived sufficiently, e.g.

from non-canonical views, color and texture are critical to identify the object. Biederman and Gerhardstein suggested that the viewpoint effect is sometimes caused by visual processes other than those responsible for normal object recognition, while Tarr and Bülthoff maintained that both viewpoint-invariant and viewpoint-dependent mechanisms are integral parts of the visual by: View-point dependence states that the way one recognized an object depends upon its viewpoint.

It is more focused on remembering the image as a whole and the different ways it was viewed. It also states that how quickly or accurately one can recognize an object depends on its orientation, this point greatly differing with view-point invariance.

Much of the work on object recognition and sensory memories was integrated in Neisser's influential book Cognitive Psychology (Neisser ). The book served as the first comprehensive statement of existing research in cognitive psychology, and it gave the new field its.

For object recognition using three-dimensional models, the perspective effect and viewpoint of the image have to be considered. The fact that the models are three-dimensional and the images contain only two-dimensional information affects object recogni­ tion approaches.

the color effects on object recognition and we discuss some apparently contradictory results described in the scientific literature. We also present the main results of a meta-analysis in which the behavioral literature on the effect of color in object recognition has been explored and integrated (Bramão, Reis, Petersson, & Faísca, ).

6) In parts-based approaches to object recognition, a) the identification of the object is viewpoint dependent. b) the whole image of the object is examined holistically. c) the representation stored in memory is analogous to the object being recognized. d) the orientation or the perspective of view on the object is not important.

Algorithms for Object Recognition In order to understand the core difference between structural descriptions and views, it is important to step back and consider the problem of object recognition, broadly defined.

Object recognition is the process of matching a representation of an object's image to a representation in long-term memory. and 1b, object recognition task), we replicated the scene consistency effect (i.e., there was higher accuracy for the objects with consistent backgrounds).

However, there was a significant interaction effect between consistency and object viewpoint, which indicated that the scene consistency effect.

In fact, it has been shown that humans display view-invariant recognition of familiar objects, but have a view-dependent performance in recognition tasks involving novel objects or unfamiliar. As predicted by the literature, object recognition performance improved when view changes (45° or 90°) resulted from active observer movements around the object instead of object movements.

Modulation of viewpoint effects in object recognition by shape and motion cues. Effect of Active Exploration of 3-D Object Views on the View-Matching Process in Object Recognition Takafumi Sasaoka, Nobuhiko Asakura, and Tetsuo Kawahara Perception 3, Viewpoint-dependent theories suggest that object recognition is affected by the viewpoint at which it is seen, implying that objects seen in novel viewpoints reduce.

Handbook of Object Novelty Recognition, Vol synthesizes the empirical and theoretical advances in the field of object recognition and memory that have occurred since the development of the spontaneous object recognition book is divided into four sections, covering vision and perception of object features and attributions, definitions of concepts that are associated with object.

The Effects of Viewpoint on Object Recognition Throughout most of the s and into the early s, an often acrimonious debate raged—both in the literature and at scientific meetings—between the proponents of view-based models of object recognition and. Abstract 1.

Biederman and PC Gerhardstein () demonstrated that a representation specifying a distinctive arrangement of viewpoint-invariant parts (a geon structural description,[GSD]) dramatically reduced the costs of rotation in depth.

MJ. In addition, independent of the effect of viewpoint, object recognition was associated with ventral areas and mental rotation with dorsal areas. These results indicate that the similar behavioral effects of viewpoint obtained in these two tasks are based on different neural substrates.theories of human object recognition are briefly considered below, with particular emphasis being laid upon the predictions of the effects of viewpoint upon recognition efficiency.

Marr's account Marr and coworkers (Marr and Nishihara ; Marr ) proposed that object representations are stored as three-dimensional object-centred models.Participants viewed objects in the central visual field and then named either same or different depth-orientation views of these objects presented briefly in the left or the right visual field.

The different-orientation views contained either the same or a different set of parts and relations. Viewpoint-dependent priming was observed when test views were presented directly to the right.