Three-dimensional tree shape rectangular coordinate system construction and image space calibration device and method

Abstract

The invention relates to a simple and visual three-dimensional tree shape device and an implementation scheme. According to the device, a three-dimensional Cartesian rectangular coordinate system can be rapidly and precisely constructed, the space geometrical elements of point, line, surface and body are constructed, coordinates of the space geometrical elements in a three-dimensional rectangular coordinate system are calibrated, geometrical relationships between the geometrical elements are judged, the space relationship between shooting equipment and the device is constructed, and a calibration device for calibrating an image space exists. The device is simple in structure, high in integral forming manufacture precision and flexible in composition. The device has extensive applications and wide application fields, and can serve as an operating device in geometry teaching and a three-dimensional scanning device based on images and a construction and calibration device of space coordinate systems such as a movement capture system. The specific image space calibration method is based on a geometry principle and combined with the advantages of the device, and the operation and using method in a specific function of the device are elaborated in detail.

Description

technical field [0001] The invention relates to a device and method for constructing a three-dimensional tree-type rectangular coordinate system and calibrating image space. The device can be used as a device for constructing a coordinate system and calibrating image space. The specific functions include: building a three-dimensional Cartesian coordinate system, constructing spatial geometric elements point, line, surface, and body, characterizing the coordinates of spatial geometric elements in the three-dimensional rectangular coordinate system, determining the geometric relationship between geometric elements, constructing shooting equipment and The spatial relationship of the installation, and the calibration of the image space. It belongs to the establishment of a three-dimensional space coordinate system, the coordinate representation of geometric elements in the coordinate system, the determination of spatial geometric relations, the construction of spatial relations be...

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Problems solved by technology

This leads to the fact that the transformation between the actual space and the image space is generally nonlinear, so the X and Y The coordinate accuracy of these two directions can be guaranteed, but the coordinates perpendicular to the calibration plate Z The coordinate accuracy of the direction may not be guaranteed; and because most of the lenses of the shooting equipment are spherical, the existence of aberration makes the light at the edge more prone to severe refraction and bending than the light at the center. If two-dimensional calibration is still used The board calibrates the image space, which increases the coordinate error of the target space in the edge area of ​​the lens, thereby affecting the resolution accuracy of the image space

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