A method of diameter measurement for spur gear based on camera calibration

摘要

The camera calibration is the basis of putting the computer vision technology into practice. This paper proposes a newmethod based on camera calibration for diameter measurement of gear, and analyses the error from calibration andmeasurement. Diameter values are gained by this method, which firstly gets the intrinsic parameters and the extrinsicparameters by camera calibration, then transforms the feature points in image coordinate extracted from the image planeof gear to the 3D world coordinate, lastly computes distance between the features points. The experiment resultsdemonstrate that the method is simple and quick, and easy to implement, highly precise, and rarely limited to the size oftarget.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.