基于图像分析的航空相机像移补偿机构检测方法研究

Fault Detection for Aerial Camera Image Motion Compensation Mechanism Based on Image Processing

为了对航空相机反射镜摆动补偿机构故障状态的监测,分析了航空相机前向像移产生的原理,相机补偿机构故障对图像质量的影响,提出了利用像移残差判断相机补偿机构组件故障的方法。通过建立前向像移模型,分析了补偿机构各组件与像移残差的关系,并以反射镜补偿的某型航空相机进行实拍验证,通过对图像中像移残差实测,并与理论分析结果对照,能准确判断补偿机构故障状态。该方法可以用于同类型航空相机像移补偿机构故障部位的判定,可以避免使用实装检测仪器时的繁琐操作,提高了检测效率。

In order to detect the fault states of aerial camera＇s reflector swinging compersator, the generation principle of aerial camera forward image motion and how the compersator＇s fault to affect the image quality were analyzed. A method of fault detection which makes use of image motion residual error for aerial camera compensator was presented. Through model developing for forward image motion, the relation of compensator＇s module and image motion residual error was analyzed, and the model was valedated by practical shooting by some type aerial camera which had reflector swinging compensator. By practical measuring the image motion residual error and comparing with the theory analysis result, the fault states of aerial camera＇s reflector swinging compensator can be estimated exactly. So, the method can be applied to detect the fault part of image motion compensator for aerial cameras which of the same type. The method can avoid the fussy operation of fixing the detection instruments and improve the efficiency of detection.