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A Calibration Algorithm for Line-Scan Cameras Oriented to High-precision Two-dimensional Dimension Measurement

A line-scan camera, high-precision technology, used in computing, image analysis, instruments, etc.

Active Publication Date: 2022-04-26
CASI VISION TECH (LUOYANG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the limitations and deficiencies existing in the application of the existing linear array camera calibration algorithm to high-precision two-dimensional size measurement tasks, and to provide a convenient and high-precision calibration method

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  • A Calibration Algorithm for Line-Scan Cameras Oriented to High-precision Two-dimensional Dimension Measurement
  • A Calibration Algorithm for Line-Scan Cameras Oriented to High-precision Two-dimensional Dimension Measurement
  • A Calibration Algorithm for Line-Scan Cameras Oriented to High-precision Two-dimensional Dimension Measurement

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Embodiment Construction

[0018] In order to further illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0019] Such as figure 1 As shown, the algorithm process includes: ideal model design of the line array camera, image distortion correction, key parameter extraction, model parameter calibration, relative error elimination, and real size calculation. The following describes each of the above processes with examples (but the actual process is not limited to The following methods are used to achieve the detection effect of each process):

[0020] 1. Ideal model design of line scan camera. Such as figure 2 As shown, the ideal model of a line scan camera includes the relationship between the image coordinate system and the camera coordinate system (ie, the internal reference model) and the relationship between the c...

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Abstract

The invention discloses a line array camera calibration algorithm for high-precision two-dimensional dimension measurement. The calibration algorithm includes algorithm modules such as ideal model design of line array camera, image distortion correction, key parameter extraction, model parameter calibration, relative error elimination, and real size calculation. A universal and convenient calibration method has broad industrial application prospects.

Description

technical field [0001] The invention belongs to the field of machine vision, and is a calibration method for a line array camera, which is suitable for various high-precision two-dimensional size measurement tasks. and versatility. Background technique [0002] Line scan cameras are widely used in industrial defect detection, high-precision dimension measurement, traffic detection and other fields. Compared with general area scan cameras, line scan cameras have the advantages of larger field of view, higher resolution, and lower cost. Therefore, line scan cameras are especially suitable for the task of high-precision two-dimensional dimension measurement in machine vision. [0003] The calibration of the line scan camera is the first step in its use, and it is also a necessary step. However, for two-dimensional dimension measurement tasks. The existing calibration algorithms for line scan cameras are relatively cumbersome, or require complex calibration equipment. The c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80
CPCG06T7/80
Inventor 不公告发明人
Owner CASI VISION TECH (LUOYANG) CO LTD