Título
Integrated three-dimensional reconstruction with efficiently acquiring reflectance fields
Autor
MARIA LUISA ROSAS CHOLULA
Colaborador
MIGUEL OCTAVIO ARIAS ESTRADA (Asesor de tesis)
Nivel de Acceso
Acceso Abierto
Materias
Electroencephalography - (ELECTROENCEFALOGRAFÍA) Frequency-domain analysis - (ANÁLISIS DE DOMINIO DE FRECUENCIA) Correlation methods - (MÉTODOS DE CORRELACIÓN) Filtering theory - (FILTRADO DE LA TEORÍA) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) MATEMÁTICAS - (CTI) CIENCIA DE LOS ORDENADORES - (CTI)
Resumen o descripción
The reconstruction of object surfaces is an important area in computer vision. This
area is directed towards the recovery of three-dimensional information of an object
placed in a scene. Most classical existing reconstruction methods assume that objects
in the scene reflect light equally in all directions. This assumption on surface
reflectance is referred as a Lambertian BRDF (Bidirectional Reflectance Distribution
Function) however, Lambertian reflectance is not fulfilled for real-world objects, leading
to incorrect depth estimates. Several methods propose a partial solution taking
advantage of calibrated cameras and lights or some approximation of the surface
reflectance.
Reflectance fields are a common image-based model used for rendering the appearance
of objects with a high-degree of realism. Reflectance fields are used in a
variety of applications. For example, they are used to capture the appearance of
real-world objects with complex geometry, like human bodies, furry teddy bears, or
bonsai trees. They are also used to represent intricate distributions of light, like the
illumination from a flash light. However, despite the increasing popularity of using
reflectance fields, fast methods do not exist for acquiring them.
This thesis presents two main contributions towards reflectance field acquisition
and three-dimensional reconstruction. The first is a method for acquiring efficiently
the reflectance field data to provide the surface reflectance information. This method
introduces the use of independent component analysis, it enables fast acquisition of
the reflectance field. The prototype acquisition system consists of a pair of projector
and camera controlled by a computer. The effectiveness of the system is demonstrated
with scenes composed of different material properties where the reflectance quality is
maintained.
The second contribution is a three-dimensional reconstruction of real-world objects
placed in the scene. Three-dimensional reconstruction is obtained by relating depth
estimations with reflectance fields. The reflectance field is integrated with threedimensional
reconstruction equations by considering the system setup as a stereo
system, it provides depth estimations of objects exhibiting different material properties
with high accuracy.
Editor
Instituto Nacional de Astrofísica, Óptica y Electrónica
Fecha de publicación
enero de 2013
Tipo de publicación
Tesis de doctorado
Versión de la publicación
Versión aceptada
Recurso de información
Formato
application/pdf
Idioma
Inglés
Audiencia
Estudiantes
Investigadores
Público en general
Sugerencia de citación
Rosas-Cholula M.L.
Repositorio Orígen
Repositorio Institucional del INAOE
Descargas
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