{"id":94151,"date":"2018-03-11T10:13:46","date_gmt":"2018-03-11T10:13:46","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/angular-variation-as-a-monocular-cue-for-spatial-percepcion\/"},"modified":"2018-03-11T10:13:46","modified_gmt":"2018-03-11T10:13:46","slug":"angular-variation-as-a-monocular-cue-for-spatial-percepcion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/inteligencia-artificial\/angular-variation-as-a-monocular-cue-for-spatial-percepcion\/","title":{"rendered":"Angular variation as a monocular cue for spatial percepcion"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Agust\u00edn Alfonso Navarro Toro <\/strong><\/h2>\n<p>Monocular cues are spatial sensory inputs which are picked up exclusively from one eye. They are in majority static features that  provide depth information and are extensively used in graphic art to create realistic representations of a scene. Since the spatial  information contained in these cues is picked up from the retinal image, the existence of a link between it and the theory of direct  perception can be conveniently assumed. According to this theory, spatial information of an environment is directly contained in the  optic array. Thus, this assumption makes possible the modeling of visual perception processes through computational approaches.  in this thesis, angular variation is considered as a monocular cue, and the concept of direct perception is adopted by a computer  vision approach that considers it as a suitable principle from which innovative techniques to calculate spatial information can be  developed.        the expected spatial information to be obtained from this monocular cue is the position and orientation of an object with respect to  the observer, which in computer vision is a well known field of research called 2d-3d pose estimation. In this thesis, the attempt to  establish the angular variation as a monocular cue and thus the achievement of a computational approach to direct perception is  carried out by the development of a set of pose estimation methods. Parting from conventional strategies to solve the pose  estimation problem, a first approach imposes constraint equations to relate object and image features.  In this sense, two algorithms  based on a simple line rotation motion analysis were developed. These algorithms successfully provide pose information; however,  they depend strongly on scene data conditions. To overcome this limitation, a second approach inspired in the biological processes  performed by the human visual system was developed. It is based in the proper content of the image and defines a computational  approach to direct perception.        the set of developed algorithms analyzes the visual properties provided by angular variations. The aim is to gather valuable data  from which spatial information can be obtained and used to emulate a visual perception process by establishing a 2d-3d metric  relation. Since it is considered fundamental in the visual-motor coordination and consequently essential to interact with the  environment, a significant cognitive effect is produced by the application of the developed computational approach in environments  mediated by technology. In this work, this cognitive effect is demonstrated by an experimental study where a number of participants  were asked to complete an action-perception task. The main purpose of the study was to analyze the visual guided behavior in  teleoperation and the cognitive effect caused by the addition of 3d information. The results presented a significant influence of the  3d aid in the skill improvement, which showed an enhancement of the sense of presence.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Angular variation as a monocular cue for spatial percepcion<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Angular variation as a monocular cue for spatial percepcion <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Agust\u00edn Alfonso Navarro Toro <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 18\/06\/2009<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Juan Aranda L\u00f3pez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: al\u00edcia Casals gelp\u00ed <\/li>\n<li>xavier Llad\u00f3 bardera (vocal)<\/li>\n<li>v\u00edctor Fernando Mu\u00f1oz mart\u00ednez (vocal)<\/li>\n<li>raul Mar\u00edn prades (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Agust\u00edn Alfonso Navarro Toro Monocular cues are spatial sensory inputs which are picked up exclusively from one [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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