72 results about "Camera matrix" patented technology

Aspects of the present invention include systems and methods for recalibrating projector-camera systems. In embodiments, systems and methods are able to recalibrate automatically the projector with arbitrary intrinsic and pose, as well as render for arbitrarily desired viewing point. In contrast to previous methods, the methods disclosed herein use the observing camera and the projector to form a stereo pair. Structured light is used to perform pixel-level fine reconstruction of the display surface. In embodiments, the geometric warping is implemented as a direct texture mapping problem. As a result, re-calibration of the projector movement is performed by simply computing the new projection matrix and setting it as a camera matrix. For re-calibrating the new view point, the texture mapping is modified according to the new camera matrix.

A three-dimensional (3-D) shape measurement method using a Moire measurement principle and a Stereo vision measurement principle is provided. The method comprises; a first step to detect candidate points and 3D positions of the candidate points in world coordinates which are identical results from typical Moiré technique by using a pattern projector, which adjusts a pitch of a fringe pattern and projects the fringe pattern to a measurement object, and a first camera, which detects a modulated fringe pattern caused by shape of the object, by means of obtaining candidate points by comparing a reference fringe pattern to the modulated fringe pattern and calculating 3D positions at an arbitrary point on an image captured from the first camera; a second step to determine a final matching point among the candidate points detected from the first step by using the Stereo vision technique with the first and the second cameras, by means of projecting the 3D positions of the candidate points to an image plane of the second camera based on a camera matrix of the second camera, comparing intensity value of a projected point in the image plane of the second camera to intensity value of given point in the image plane of the first camera, and judging whether the candidate point is matched with an arbitrary point by using the stereo vision criteria; and a third step to measure the depth value of the arbitrary point by using the resultant value of the final matching point, which was determined at the second step. Therefore, the error of 2π ambiguity of the typical Moire principle is eliminated, and thus 3-D shape information can be more rapidly and accurately measured.

The invention discloses a synthetic method of stereoscopic elements in a combined stereoscopic image system collected by a sparse lens, and belongs to the technical field for generating stereoscopic images. The method comprises the following steps of: arranging a sparse camera matrix; calculating optical parallax image between each shot image and an adjacent horizontal image and between each shot image and an adjacent vertical image; expanding a binocular stereoscopic vision model into a multi-eye stereoscopic vision model, and calculating spatial location coordinates of actual object points corresponding to the pixel points in each image according to a horizontal parallax image and a vertical parallax image of each image; transforming the spatial location coordinates of the actual object points corresponding to the pixel points calculated in all images into the same coordinate system; virtually simulating a camera array, projecting the actual object points corresponding to the pixel points in each image under the same coordinate system to each virtual camera to generate sub-images; interpolating the points without being filled; and generating a stereoscopic element image. The synthetic method can be used for accomplishing the parallel generation of a great quantity of virtual view points and is more suitable for virtual synthetics of the stereoscopic element image; and therefore, for an image source of the combined stereoscopic image system, live action shooting can be carried out in place of computer production.