Active Visual Object Reconstruction using D-, E-, and T-Optimal Next Best Views (2008)
Stefan Wenhardt, Benjamin Deutsch, Elli Angelopoulou, Heinrich Niemann
In visual 3-D reconstruction tasks with mobile cameras, one wishes to move the cameras so that they provide the views that lead to the best reconstruction result. When the camera motion is adapted...
Sensor Band Selection for Multispectral Imaging via Average Normalized Information (2008)
Hongzhi Wang, Elli Angelopoulou
Abstract. The information-rich scene descriptors created by multispectral sensors can act as a bottleneck in further analysis. Many of the spectral band selection methods treat the two underlying...
Dimensionality Reduction for Multispectral Skin Data (2008)
Dongmei Shi, Dongmei Shi, Elli Angelopoulou, Elli Angelopoulou
Principal Component Analysis ( PCA ), Locally Linear Embedding ( LLE ) and Isomap techniques can be used to process and analyze high-dimensional data domains.
1 3-D Stereo Using Photometric Ratios (2007)
Lawrence B. Wolff, Elli Angelopoulou
We present a novel robust methodology for corresponding a dense set of points on an object surface from photometric values, for 3-D stereo computation of depth. The methodology utilizes multiple...
Elli Angelopoulou, James P. Williams, Lawrence B. Wolff
An invariant local descriptor of smooth object surfaces is Gaussian curvature. We present an object signature which is a condensed representation related to the object's Gaussian curvature...
3-D Stereo Using Photometric Ratios (2007)
Lawrence B. Wolff, Elli Angelopoulou
We present a novel robust methodology for corresponding a dense set of points on an object surface from photometric values, for 3-D stereo computation of depth. The methodology utilizes multiple...
Multispectral Sensors in Computer Vision (2007)
Sofya Poger, Sofya Poger, Elli Angelopoulou, Elli Angelopoulou
Abstract: The majority of color work in machine vision has been based on a trichromatic (and specifically RGB) color representation. In reality, color is a continuous univariate function of...
World Model Representations for Mobile Robots (2007)
Elli Angelopoulou, Tsai-hong Hong, Angela Y. Wu
World Model is a key component of any intelligent machine. The modeling system must be able to adequately model the complexity of objects in the environment and it must contain enough structure to...
The Color of Specular Highlights (2007)
Elli Angelopoulou And, Elli Angelopoulou, Sofya Poger
An integral part of computer graphics, machine vision and human vision understanding is modeling how a surface reflects light. There is a substantial body of work on models describing surface...
Multispectral Skin Color Modelling (2001)
Angelopoulou, Elli, Molana, Rana, Daniilidis, Kostas
The automated detection of humans in computer vision as well as the realistic rendering of people in computer graphics necessitates improved modeling of the human skin color. We describe the...
Multispectral Skin Color Modeling (2001)
Angelopoulou, Elli, Molana, Rana, Daniilidis, Kostas
The automated detection of humans in computer vision as well as the realistic rendering of people in computer graphics necessitates improved modeling of the human skin color. In this paper we...
Selecting Components for Building Multispectral Sensors (2001)
Poger, Sofya, Angelopoulou, Elli
The majority of color work in machine vision has been based on a trichromatic (and specifically RGB) color representation. In reality, color is a continuous univariate function of wavelength which...
Multispectral Skin Color Modeling (2001)
Angelopoulou, Elli, Molana, Rana, Daniilidis, Kostas
The automated detection of humans in computer vision as well as the realistic rendering of people in computer graphics necessitates improved modeling of the human skin color. In this paper we...
Multispectral skin color modeling (2001)
Elli Angelopoulou, Rana Molana
The automated detection of humans in computer vision as well as the realistic rendering of people in computer graphics necessitates improved modeling of the human skin color. In this paper we...
Understanding the color of human skin (2001)
The automated detection of humans in computer vision as well as the realistic rendering of people in computer graphics necessitates a better understanding of human skin reflectance. Prior vision and...
The Reflectance Spectrum of Human Skin (1999)
The automated detection of human skin has become an important task for machine vision systems. Prior vision and graphics research on this topic has primarily focused on images acquired with...
Laser Scanner Technology (1999)
Angelopoulou, Elli, Wright, John R
This paper addresses the basic principles, performance measures and applications associated with laser scanner technologies. The objective of this report is to communicate and disseminate pertinent...
Angelopoulou, Elli, Lee, Sang W, Bajcsy, Ruzena
Although photometric data is a readily available dense source of information in intensity images, it is not widely used in computer vision. A major drawback is its dependence on viewpoint and...
The reflectance spectrum of human skin (1999)
The automated detection of human skin has become an important task for machine vision systems. Prior vision and graphics research on this topic has primarily focused on images acquired with...
Laser Scanner Technology (1999)
Elli Angelopoulou, John R. Wright
This paper addresses the basic principles, performance measures and applications associated with laser scanner technologies. The objective of this report is to communicate and disseminate pertinent...
Although photometric data is a readily available dense source of information in intensity images, it is not widely used in computer vision. A major drawback is its dependence on viewpoint and...
Photometric Surface Analysis in a Tri-Luminal Environment (1999)
Elli Angelopoulou, James P. Williams
Methods for the analysis of images of the same scene taken under three different lighting conditions are illustrated. A technique that separates the effects of geometry and surface coloration/texture...
A Curvature Based Descriptor Invariant to Pose and Albedo Derived from Photometric Data (1997)
Elli Angelopoulou, James P. Williams, Lawrence B. Wolff
Gaussian curvature is an invariant local descriptor of smooth surfaces. We present an object signature which is a condensed representation of the distribution of Gaussian curvature information at...
3-D Stereo Using Photometric Ratios (1994)
Lawrence B. Wolff, Elli Angelopoulou
Abstract. We present a novel robust methodology for corresponding a dense set of points on an object surface from photometric values, for 3-D stereo computation of depth. We use two stereo pairs of...
3-D Stereo Using Photometric Ratios (1994)
Lawrence B. Wolff, Elli Angelopoulou
. We present a novel robust methodology for corresponding a dense set of points on an object surface from photometric values, for 3-D stereo computation of depth. We use two stereo pairs of images,...