一种便携式的无人机航测非量测相机标定方法

相机标定是确定相机几何和光学参数的过程,相机经过标定后能更准确地获取二维目标点坐标对应的空间三维信息。针对无人机航空非量测相机便捷、精确的标定需要,采用了一种基于红绿编码板的自检校光束法平差标定方法。该方法通过自动提取和识别编码标志、建立同名点对,利用同名点对进行相对定向测定初始参数,然后考虑相机内参数和镜头畸变等因素,采用严格的自检校光束法平差模型解算出精确的相机参数。通过对NEX5N相机拍摄的45张相片作为实验数据解算该相机内部参数,实验结果表明,由于标定板便于携带,标定场布设简单,该方法对实验场地要求低,并简单易行,且标定的速度快、精度高,基本可以满足无人机非量测相机"随时随地"即时标定的需求。

A portable non-metric camera calibration method for UAV photogrammetry

Camera calibration is the procedure to determine the geometrical and optical parameters of the camera. we can obtain more accurate information of the target point in two-dimensional corresponding to the three-dimensional spatial after camera calibration. This paper describe a portable non-metric camera calibration method which aim at quicklySandSaccurately requirements. The method use Red and green color attributes in the design of automatically detected and identified coded targets and approach to initial value determination for relative orientation, this process consideringStheSfactorsSsuch asSthe camera distortion and solution the camera calibration via a self-calibrating bundle adjustment. Finally, an example of color-coded targets cameraScalibration process by use forty-five NEX5N camera photos. Because of the portable calibration plates and simple calibration field. This method has low requires on the experimental site. The fast and high precision result is shown that the method can satisfy with the requirements of the wherever and whenever possible-camera calibration.