在立式风洞飞机尾旋运动姿态测量实验中, 由于拍摄角度以及光照等原因, 飞机表面直线段标识成像不是十分规则, 直线段特征难于识别。对此, 提出了一种新的不规则直线段识别方法。该方法利用一定尺寸的模板窗口沿直线段移动, 根据模板中心的移动轨迹判断检测结果。模板的移动以检测窗口质心对中心的偏移量为动力, 以检测窗口有效像素百分比、线段延伸方向和移动步数等参数为控制检测结果。该方法的检测过程类似于小球滚过宽度相当的凹槽, 故又称为基于滚球原理的直线段检测方法。实验证明, 该方法具有较好的稳定性, 对直线段的变形来说具有一定的容错性, 对检测参数的调整来说可控制检测对象的宽度和直线段不规则性的允许程度, 无论是对仿真图像还是对实测图像中的直线段特征都具有较好的检测结果。

In the spin experiment, the line segments on the aircraft model in the spin time are too blurry to be detected. A new solution to the problem of blurry line segment detections is presented. With a templet window moving across the line, the segment is distinguished through the track of the center point of the window. There are three primary parameters, the proportion of the effectual pixel in the window, the extending direction of the line and the steps of the window, which control the process of the window moving. Further, blurry the line segments can be controlled by changing the paremeters. The line segment detecting results show, whether from the emulational figures or the actual photographes, are successful.