9 years 9 months ago
Attached shadow coding: Estimating surface normals from shadows under unknown reflectance and lighting conditions
We present a novel technique, termed attached shadow coding, for estimating surface normals from shadows when the reflectance and lighting conditions are unknown. Our key idea is ...
Takahiro Okabe, Imari Sato, Yoichi Sato
119views more  PRESENCE 2007»
9 years 11 months ago
Gaze-Contingent Visual Presentation Based on Remote Saccade Detection
Pursuing new display techniques based on insights into human visual perception can reveal new possibilities for visual information devices. Here, we propose a novel information pr...
Junji Watanabe, Hideyuki Ando, Taro Maeda, Susumu ...
144views more  PAMI 2007»
9 years 11 months ago
Multiplexing for Optimal Lighting
—Imaging of objects under variable lighting directions is an important and frequent practice in computer vision, machine vision, and image-based rendering. Methods for such imagi...
Yoav Y. Schechner, Shree K. Nayar, Peter N. Belhum...
229views Education» more  SIGCSE 2002»
9 years 11 months ago
GraphicsMentor: a tool for learning graphics fundamentals
This paper discusses the functionality of GraphicsMentor. GraphicsMentor permits a student to modify many parameters of the camera, objects, and light sources interactively, and t...
Dejan Nikolic, Ching-Kuang Shene
192views more  IJCV 1998»
9 years 11 months ago
What Is the Set of Images of an Object Under All Possible Illumination Conditions?
The appearance of an object depends on both the viewpoint from which it is observed and the light sources by which it is illuminated. If the appearance of two objects is never iden...
Peter N. Belhumeur, David J. Kriegman
116views more  CGF 1998»
9 years 11 months ago
A Light Hierarchy for Fast Rendering of Scenes with Many Lights
We introduce a new data structure in the form of a light hierarchy for efficiently ray-tracing scenes with many light sources. An octree is constructed with the point light sourc...
Eric Paquette, Pierre Poulin, George Drettakis
110views more  CGF 1998»
9 years 11 months ago
Adaptive Supersampling in Object Space Using Pyramidal Rays
We introduce a new approach to three important problems in ray tracing: antialiasing, distributed light sources, and fuzzy reflections of lights and other surfaces. For antialias...
Jon D. Genetti, Dan Gordon, G. Williams
94views more  IVC 2000»
9 years 11 months ago
Pupil detection and tracking using multiple light sources
We present a fast, robust, and low cost pupil detection technique that uses two near infra red time multiplexed light sources synchronized with the camera frame rate. The two ligh...
Carlos Hitoshi Morimoto, David Koons, Arnon Amir, ...
102views more  CGF 2004»
9 years 11 months ago
Real-time Light Animation
Light source animation is a particularly hard field of real-time global illumination algorithms since moving light sources result in drastic illumination changes and make coherenc...
Mateu Sbert, László Szécsi, L...
139views more  TOG 2008»
9 years 11 months ago
Logarithmic perspective shadow maps
We present a novel shadow map parameterization to reduce perspective aliasing artifacts for both point and directional light sources. We derive the aliasing error equations for bo...
Brandon Lloyd, Naga K. Govindaraju, Cory Quammen, ...