Three-dimensional reconstruction method based on bundle adjustment

A beam adjustment and error equation technology, applied in the field of large-scale photogrammetry, can solve the problems affecting the quality of workpiece assembly, low positioning position measurement accuracy, etc., and achieve the effect of improving positioning accuracy and calibration accuracy.

Inactive Publication Date: 2013-01-23
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

Therefore, the measurement accuracy of the positioning position and the measurement accuracy of the workpiece attitude directly affect the quality of the workpiece assembly.

Method used

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  • Three-dimensional reconstruction method based on bundle adjustment
  • Three-dimensional reconstruction method based on bundle adjustment
  • Three-dimensional reconstruction method based on bundle adjustment

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] The bundle adjustment method described in the embodiment of the present invention refers to the image point coordinates of the control points, the image point coordinates of the points to be determined (or space measurement points), and part or all of other measurement data They are all regarded as observation values, so as to solve their OR values ​​(that is, the final result) and the spatial coordinates of the undetermined points as a whole at the same...

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Abstract

The invention relates to a three-dimensional reconstruction method based on bundle adjustment. The three-dimensional reconstruction method comprises the following steps of: calibrating parameters of the interior orientation of a digital camera in a control field through a first iterative process; calibrating parameters of the exterior orientation of the digital camera through a space resection method with a second iterative process in a measuring field by using the parameters of the interior orientation as a given value; and acquiring three-dimensional spatial values of a plurality of measuring points through a bundle adjustment method based on a collinearity condition equation by using the parameters of the interior orientation and the parameters of the exterior orientation as initial values and using image point coordinates of a plurality of control points and a plurality of measuring points in the measuring field as observed values. By the three-dimensional reconstruction method based on the bundle adjustment in an embodiment of the invention, the positioning accuracy of spatial measuring points can be improved in a three-dimensional reconstruction process.

Description

technical field [0001] The invention relates to the technical field of large-scale photogrammetry, in particular to a three-dimensional reconstruction method based on beam adjustment. Background technique [0002] With the rapid development of my country's national economy, there are clear expectations and requirements for large-scale measurement accuracy in the production and processing of aviation, aerospace, electronics, automobiles, weaponry and other fields. Such as spacecraft propulsion cabin measurement (3m), large water turbine seat ring measurement (12m), large radar antenna measurement (10m), large aircraft wing measurement, etc., in the assembly and production process of these large workpieces, the position of the workpiece must be accurately positioned. [0003] With the wide application of digitization and automation technology in the assembly process of large workpieces, the positioning technology of large workpieces has developed from traditional manual positi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/00
Inventor 董明利王君孙鹏祝连庆娄小平杜叶飞
Owner BEIJING INFORMATION SCI & TECH UNIV
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