Camera model standardization method and standardization device

Abstract

The invention discloses a camera model standardization method and a standardization device. The camera model standardization method and the standardization device are achieved by virtue of a program control multi-tooth circular dividing table, a six-dimension rotary table and an one-dimension target. Direct mapping of space standard angle-image surface curve data is directly set up when the camera is calibrated. A two-dimension angle coordinate of a space standard straight line on the camera image surface is recorded, thus the camera standardization is completed. The purpose of measuring the single camera angle is achieved according to the calibrated straight line two-dimension coordinate on the random position of the standard data interpolation calculating image surface when the camera model is measured. According to the camera model standardization method and the standardization device, a traditional model that a parameter analysis imaging model is set up of the existing camera standardization method is surpassed. A non-parametric model composed by a large number of angle-curve data is set up. The camera model standardization method and the standardization device are visual in principle, convenient to achieve, good in feasibility, controllable in precision, low in cost and capable of effectively improving the current situation of difficult standardization of a large visual field camera. Complexity and cost investment of large-size target manufacturing are reduced. The camera model standardization method and the standardization device play an important role in the development of vision measurement of a large-scale workpiece.

Description

technical field [0001] The invention relates to a photogrammetry technology, in particular to a camera calibration method and a calibration device. Background technique [0002] With the development of large-scale machining fields such as aerospace, shipbuilding, automobiles, and antenna manufacturing, precision measurement of large-sized workpieces has become a key factor to ensure product quality. Usually, the size of these measurement objects is large, ranging from a few meters to tens of meters, or even hundreds of meters, with high precision requirements (10-20ppm), a relatively complex measurement environment, and a high degree of automation. Measure to ensure that the size, shape, and pose of the parts meet the predetermined requirements. The visual measurement system has been widely used and developed rapidly due to its characteristics of non-contact, high efficiency, simple operation and high precision. Among them, the camera model and its calibration is an importa...

AI Technical Summary

Problems solved by technology

However, these methods have inherent defects in the parametric model: the correlation between the parameters of the model leads to optimization solution errors; the imaging error that is difficult to analyze and express cannot be accurately summarized by the model; the target used for parameter calibration needs to cover the full field of view of the camera , leading to high cost in the case of wide field of view, etc.

These conditions limit the further improvement of precision and adaptability, making it difficult to meet the higher demands of industrial sites

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