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Coordinate cyclic approach type dual orthogonal camera system video positioning method and system

A video positioning and camera technology, applied in image analysis, image data processing, instruments, etc., can solve the problems of consuming computer resources, complex models, cumbersome calculations, etc., and achieve the effects of accurate calculation results, fast convergence speed, and fast and accurate positioning

Active Publication Date: 2012-05-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcomings of complex models, cumbersome calculations, slow speed and large consumption of computer resources in the existing target positioning technology, and provide a video positioning method and system using an orthogonal camera system. The system adopts the method of coordinate cycle approximation , to construct an iterative algorithm with excellent convergence to achieve fast and accurate positioning. At the same time, due to the error compensation achieved by arranging dual cameras on one axis, the positioning accuracy and convergence speed can be further improved

Method used

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  • Coordinate cyclic approach type dual orthogonal camera system video positioning method and system
  • Coordinate cyclic approach type dual orthogonal camera system video positioning method and system
  • Coordinate cyclic approach type dual orthogonal camera system video positioning method and system

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Embodiment Construction

[0026] Taking fingertip positioning in a virtual reality system as an example, the embodiment of the present invention is described.

[0027] Such as figure 1 Shown is a schematic diagram of the pinhole imaging principle.

[0028] Such as figure 2 , three cameras S 1 , S 2 , S 3 The optical axis is arranged along the X, Y, and Z axes, and another one and S are arranged on the X axis. 1Looking at the camera S 4 , the optical axis of the camera points to the origin, and the distance between the optical center and the origin is P. According to the range of motion of the human hand in the virtual reality system, the distance between the optical center of the camera and the origin can be set to about 120 cm. Calibrate the camera, determine the camera parameters, and obtain the focal length of the camera. Color markers are pasted on the fingertips, and the image position of the target is detected using a method based on color markers. Let: x img·1 、x img·2 、x img·3 、x ...

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Abstract

The invention discloses a coordinate cyclic approach type dual orthogonal camera system video location method and a system. The optic axes of more than four planar cameras are superposed with the coordinate axes of an orthogonal coordinate system, and moreover, at least one axis is provided with a pair of cameras looking at each other. On the basis, a coordinate cyclic approach method is put forward for visual space location to design an iterative algorithm with excellent convergence, consequently, coarse initial values can be quickly converged into accurate values, the algorithm is simple, and thereby an object can be quickly and accurately located.

Description

technical field [0001] The invention relates to a video-based three-dimensional information positioning method and a photography system device. In particular, it relates to a multi-camera system arranged in a special way and its positioning method. The method makes the optical axes of more than four plane cameras be arranged in an orthogonal manner, and there are a pair of cameras facing each other at least on a certain axis. The specially arranged camera system can quickly and accurately approach the three-dimensional position of a stationary target or track a dynamic target through a specially designed iterative method of coordinate cycle approach, and can be used in various occasions that require three-dimensional measurement and positioning. Background technique [0002] Visual space positioning technology is a three-dimensional measurement method based on computer vision theory. It uses a number of relatively fixed cameras to obtain multiple images of the same scene fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00
Inventor 顾宏斌汤勇顾人舒
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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