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《Tool Engineering》 2008-10
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A High-precision Calibration Method for Imaging Measurement System Based on Mesh Grids

Liu Lishuang Sun Shuanghua College of photoelectric information and communication engineering,Beijing Information Science and Technology University,Beijing 100192,China  
A high-precision calibration method for imaging measurement system is proposed.A mesh-grid target is designed and a feature-point extraction method is presented based on local imaging processing and parallel line fitting method.A adjusting method for vidicon's position is adopted based on targets.The imaging measurement system is calibrated through two steps: firstly,linear calibration is implemented;secondly,image aberrations are corrected polynomial fitting.The experimental results demonstrate that the calibration precision after aberration correction can achieve 0.18 pixels,which is higher than other methods.
【Fund】: 国家自然科学基金资助项目(项目编号:50675015);; 北京市属市管高校人才强教计划资助项目(项目编号:PXM2007-014224-044674)
【CateGory Index】: TP391.41
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