Camera Layout and Calibration Method for Improving the Measurement Accuracy of Depth of Field

A calibration method and measurement accuracy technology, which is applied in image data processing, instruments, calculations, etc., can solve the problems of low measurement accuracy, achieve the effect of improving calibration accuracy, solving low measurement accuracy and high precision

Active Publication Date: 2017-12-26
DALIAN UNIV OF TECH
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Problems solved by technology

The camera layout method and depth-of-field calibration method proposed by the present invention are considered from two aspects of installation and calibration, and solve the problem of low measurement accuracy in the depth-of-field direction of existing cameras

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  • Camera Layout and Calibration Method for Improving the Measurement Accuracy of Depth of Field
  • Camera Layout and Calibration Method for Improving the Measurement Accuracy of Depth of Field
  • Camera Layout and Calibration Method for Improving the Measurement Accuracy of Depth of Field

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Embodiment Construction

[0036] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0037] attached figure 1 Camera layout and calibration system diagram for improving depth of field measurement accuracy. The embodiment selects Zhuoli Hanguang high-precision electronic control device 1. The high-precision electronic control device 1 of the present invention can realize linear motion in one direction, with a linear stroke of 500mm, 360° rotation around the horizontal axis, and 360° around the vertical axis. rotate. The size of the high-precision two-dimensional plane calibration plate 2 used in the calibration process is 300mm×400mm, and the characteristic mark points on the calibration plate 2 are circular mark points, and the diameter of the circular mark points is 30mm, a total of 30, of which the calibration plate 2 Arrange 6 horizontally and 5 vertically. The selected left and right cameras 3 ...

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Abstract

The invention relates to a camera layout and a calibration method for improving the depth of field measurement accuracy, belonging to the field of computer vision, and relates to a camera layout and a depth of field calibration method for improving the camera depth of field measurement accuracy. The calibration method improves the measurement accuracy of the visual measurement system in the direction of the depth of field from two aspects: the optimized layout of the camera and the calibration of the depth of field; firstly, the length of the baseline of the two cameras and the angle between the optical axes are determined to make the camera arrangement optimal; and then according to the measurement object The distance, focusing state and lens parameters determine the depth of field range, and the high-precision electronic control device is used to drive the calibration plate to move multiple positions in the direction of the camera depth of field. At each position, multiple pictures of the calibration plate are used to calibrate the parameters of the binocular camera; Feature information Select different camera parameters at different positions of the depth of field to reconstruct feature 3D information. The invention does not need to predict the distortion model of any space in the depth of field when calibrating, which increases the robustness of calibrating. The calibration method has the advantages of simple flow, high precision and easy implementation.

Description

technical field [0001] The invention belongs to the field of computer vision measurement, and relates to a camera layout and calibration method for improving the accuracy of depth of field measurement. Background technique [0002] Space three-dimensional measurement is an important technical means to ensure the final quality of products. The continuous development of major national engineering fields such as aerospace, ships, and automobiles has put forward higher requirements for measurement. The structure of the measured object is complex, the measured parameters are many, the size and the range of motion are extended in three dimensions of space, and the measurement range is large. Visual measurement technology has the advantages of non-contact, high precision, strong real-time performance and adaptability, and wide measurement range, and has been widely used in high-precision measurement in recent years. Camera installation and calibration are very important and direct...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80
Inventor 刘巍李肖丁立超贾振元赵凯严洪悦
Owner DALIAN UNIV OF TECH
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