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Shaft diameter measurement using a digital image
- Source :
- Optics and Lasers in Engineering. 55:183-188
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- In this paper, a non-contact and high-precision method based on the processing of a digital image is presented to measure the diameter of a shaft. The method mainly involves three steps: first, the camera is calibrated by an improved approach, which only uses the feature points in the measurement area of the image to optimise the local camera model; second, with the help of the parameters of the model in the first step, a measurement method for determining the shaft diameter is proposed; finally, to embody the spatial attitude of the shaft accurately, the extrinsic parameters are re-calibrated by measuring a shaft whose diameter is known, and then the precision of measurement is improved by means of the new extrinsic parameters. The experimental data demonstrate that the proposed method exhibits high precision, with relative errors of approximately 0.005 mm.
- Subjects :
- Measurement method
Diameter measurement
business.industry
Computer science
Mechanical Engineering
Measure (physics)
Experimental data
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Image (mathematics)
Digital image
Feature (computer vision)
Computer vision
Artificial intelligence
Electrical and Electronic Engineering
business
Camera resectioning
Subjects
Details
- ISSN :
- 01438166
- Volume :
- 55
- Database :
- OpenAIRE
- Journal :
- Optics and Lasers in Engineering
- Accession number :
- edsair.doi...........aec17e9d6a3c978c60e77e840f87beef