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Target ball mirror center positioning method

A center positioning and target ball technology, which is applied in image data processing, instruments, calculations, etc., can solve the problems of poor stability and low accuracy, and achieve the effect of algorithm stability and high mirror center positioning accuracy

Inactive Publication Date: 2016-03-02
北京中盈智航科技有限责任公司
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Problems solved by technology

[0007] The technical problem solved by the present invention: In order to solve the shortcomings of low accuracy and poor stability in the existing target ball mirror center positioning method, the present invention provides a target ball mirror center positioning method for multi-sensor under complex lighting conditions Global Calibration of 3D Vision Measurement System

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Embodiment Construction

[0026] like figure 1 As shown, the process of the method of the present invention is to firstly perform calibration plate segmentation and template matching on the collected target ball image, locate the area where the target ball is located, and then realize target ball segmentation and strong reflection in the positioning area based on the MeanShift algorithm and image color information region removal, and then perform quadratic eight-neighborhood morphological erosion and quadratic eight-neighborhood morphological expansion operations on the image after strong reflective region removal to obtain an internally connected, smooth-boundary target ball mirror target area, and finally The statistical calculation of the pixel point coordinates of the target area results in the analytical form of the mirror center positioning coordinates:

[0027] x center = ...

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Abstract

Provided is a target ball mirror surface center locating method. Firstly, collected target ball images are located based on a target ball area of an image partitioning method, then the target ball partition and the strong light reflection area removal are achieved based on Mean Shift algorithm and image color information, pixel points in a target ball mirror surface area are extracted through a morphological processing method, and finally pixel coordinates in the target ball mirror surface area are calculated in a statistical mode to obtain an analytic form of mirror surface center location coordinates. The target ball mirror surface center locating method effectively restrains effects of illumination variation and target ball shooting angle change on target ball mirror surface center location, acquire higher mirror surface center location accuracy and be stable and reliable in algorithm.

Description

Technical field [0001] The invention relates to a method for positioning the center of a high-precision irregular light spot at an industrial site, in particular to a method for positioning the center of a target ball mirror of a laser tracker. Background technique [0002] Laser trackers are widely used in the global calibration of multi-sensor 3D vision measurement systems due to their high measurement accuracy, large working range, simple operation and portability. In the global calibration, the laser tracker first establishes the world coordinate system, and then places the target ball at different positions in the experimental field, and reads the three-dimensional coordinates of the mirror center of the target ball in the world coordinate system to establish multiple calibration points. At the same time, the multi-sensor 3D visual measurement system shoots the target ball at different positions, and obtains the image coordinates of the center of the mirror through a po...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00
Inventor 屈玉福姜吉祥姜楠杨民
Owner 北京中盈智航科技有限责任公司