Shape from X: Psychophysics and computation

HH Buelthoff - 1991 - direct.mit.edu
The human visual system derives a variety of information about the three-dimensional (3D)
structure of the envì-ronment from different cues. This is illustrated in figure 20.1, where …

[PDF][PDF] A matrix based method for determining depth from focus

J Ens, P Lawrence - Proceedings. 1991 IEEE Computer Society …, 1991 - scholar.archive.org
The concept of depth from focus involves calculating distances to points in an observed
scene, by modelling the effect that the camera's focal parameters have on images acquired …

3-D position sensing using a passive monocular vision system

J Cardillo, MA Sid-Ahmed - IEEE Transactions on Pattern Analysis & …, 1991 - computer.org
Passive monocular 3-D position sensing is made possible by a new calibration scheme that
relates depth to focus blur through a composite lens and aperture model. The calibration …

Depth recovery using active focus in robotics (vision)

J Dias, A de Almeida, H Araujo - Proceedings IROS'91: IEEE …, 1991 - ieeexplore.ieee.org
In practice focusing can be obtained by displacing the sensor plate with respect to the image
plane, by moving the lens or by moving the object with respect to the optical system. Moving …

Shape-from-focus: surface reconstruction of hybrid surfaces

SS Chen, W Tang, J Xu - Stochastic and Neural Methods in …, 1991 - spiedigitallibrary.org
The shape-from-focus method uses different focus levels to obtain a sequence of object
images and to estimate depth of image points. Recently, SK Nayar and Y. Nakagawa have …

[PDF][PDF] Three-dimensional representations of video using knowledge based estimation

HN Holtzman - 1991 - dspace.mit.edu
Computer animation tools allow complete control over their virtual worlds. Animators can
make changes to their models and re-render their footage over and over, until it looks just …

New method for sensor data fusion in machine vision

YF Wang - Geometric methods in computer vision, 1991 - spiedigitallibrary.org
In this paper, we propose a new scheme for sensor data fusion in machine vision. The
proposed scheme uses Kalman filter as the sensor data integration tool and hierarchical B …

Appréciation de la profondeur depuis des images nette et floue en vision 30 passive

T Simon - 1991 - hal.univ-lorraine.fr
La troisième dimension est une nécessite pour de nombreuses applications industrielles de
la vision artificielle. Nous proposons une méthode d'appréciation de la profondeur depuis …

A stereoscopic camera employing a single main lens

EH Adelson, JYA Wang - Proceedings. 1991 IEEE Computer Society …, 1991 - computer.org
In this paper, we present an approach to recognize 3D objects. The method is based on the
heat equation by calculating the geodesic distance between any pair of points x, y on …

Stereo matching by energy function minimization

MA Gennert, B Ren, AL Yuille - Optics, Illumination, and Image …, 1991 - spiedigitallibrary.org
In this paper we develop a coherent theory for stereo matching. Unlike previous theories of
stereo vision which use either image brightness or features such as edges but not both we …