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1. US4862388 - Dynamic comprehensive distortion correction in a real time imaging system

Office États-Unis d'Amérique
Numéro de la demande 06941316
Date de la demande 15.12.1986
Numéro de publication 4862388
Date de publication 29.08.1989
Numéro de délivrance 4862388
Date de délivrance 29.08.1989
Type de publication A
CIB
G06T 15/10
GPHYSIQUE
06CALCUL; COMPTAGE
TTRAITEMENT OU GÉNÉRATION DE DONNÉES D'IMAGE, EN GÉNÉRAL
15Rendu d'images tridimensionnelles
10Effets géométriques
G06T 15/20
GPHYSIQUE
06CALCUL; COMPTAGE
TTRAITEMENT OU GÉNÉRATION DE DONNÉES D'IMAGE, EN GÉNÉRAL
15Rendu d'images tridimensionnelles
10Effets géométriques
20Calcul de perspectives
CPC
G06T 15/20
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
153D [Three Dimensional] image rendering
10Geometric effects
20Perspective computation
Déposants General Electric Company
Inventeurs Bunker William M.
Mandataires Young Stephen A.
Checkovich Paul
Titre
(EN) Dynamic comprehensive distortion correction in a real time imaging system
Abrégé
(EN)

A real time computer image generation system incorporating comprehensive distortion correction in which a predistorted image is computed and placed on a projection raster prior to projection onto a view screen in order that the image as seen by a viewer appears correct. A method for implementing comprehensive distortion correction in real time utilizes fixed transfer characteristics of a projection lens coupled with scene by scene translation of each of a plurality of predetermined points from a projection raster to a location on a view screen. Each image is divided into a plurality of spans and the span corners are mapped from the projection raster to the view screen. The location of image vertices on the view screen are determined with respect to the viewer and the vertices are mapped to corresponding locations on the projector raster. An image is then generated by locating the spans within which each of the vertices is positioned and constructing an image on the projection raster using the map span corners in viewer space and the mapped vertices in projector space. The reconstructed predistorted image is then projected onto the view screen so that it appears correct to a viewer.

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