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《Transducer and Microsystem Technologies》 2010-04
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A calibration method based on line structured light vision sensor in the online visual measurement system

DUAN Yu,LIU Chang-jie,LAO Da-bao,YE Sheng-hua(State Key Laboratory of Precision Measuring Technology & Instrument,Tianjin University,Tianjin 300072,China)  
Aimed to realize on-site calibration of line structured light vision sensor in flexible online laser visual measurement system for car body-in-white,a calibration method based on invariance of cross-ratio is used in the industrial field.In this method,without restriction to the moving of the planar pattern,all the camera parameters can be readily calibrated with the mathematical model.Invariance of cross-ratio perspective projection is used to obtain calibration feature points to realize the on-site calibration of sensors.The experimental results show that this calibration method has the advantage of high-precision and the sensor precision calibrated by this method completely meet demands of measuring precision of body-in-white car.
【Fund】: 国家自然科学基金资助项目(50805105);; 天津市自然科学基金重点资助项目(09JCZDJC26900);; 天津市科技支撑计划资助项目(08ZCGYGX11800)
【CateGory Index】: TP212.14
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