Study On Geometric Exterior Calibration Method For Infrared Scanner With Large Field Of View

Large field of view infrared multi-spectral scanner is developed by civil high score support of high spatial resolution,high geometric positioning accuracy,large imaging width of the infrared remote sensing equipment.The imaging method is based on the long line of detectors.In the process of flying the aircraft to complete the line detector perpendicular to the direction of the flight to sweep,the completion of the ground scene imaging.As the field of view is large,the positioning accuracy is high,the design of the scanner adopts the TDI way with pitch compensation,the geometric parameters of the system are many,and the correlation is very complicated.Based on the above overview,this paper is based on the image of the large field of infrared multi-spectral sweep,and proposes a step-by-step method for the characteristics of the image.Based on the theoretical basis of the geometric processing of aerial image,the author tries to apply the step-by-step method to the calibration of the system error,The promotion and application of the camera to provide theoretical basis.The main work of the paper:1.According to the current situation of domestic and foreign research,the present situation and development of aviation camera calibration are introduced,and the strict geometric imaging model is introduced.The imaging geometry of wobble image is introduced.2.According to the error simulation results,the error characteristics and correlations of the parameters to be calibrated are analyzed.3.proposed a distribution check method.In the image overlap area to extract a certain number of connection points,the use of regional network adjustment of all the images within the region to refine the overall processing,4.analysis and evaluation of the accuracy of the method used in this article and whether it is feasible.