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光学测量中受到成像分辨率、光速太快等因素的影响,出现成像位移,导致测量精度不高,为了提高光学测量的精度,提出一种基于差分激励的光学成像位移测量方法。首先对采集的光学图像进行边缘检测,采用活动轮廓线对像素灰度进行调整,构成封闭的光学成像边缘轮廓。然后根据边缘轮廓特征进行位移的灰度差异性测量,运用差分激励方法计算光学成像位移控制点的梯度值,对成像的边缘轮廓进行修正,结合核空间的投影向量得到测度结构信息,实现光学成像位移测量。最后进行仿真测试,结果表明,采用该方法进行光学成像位移测量的精度较高,测量误差较小。
In the optical measurement, the imaging resolution and the speed of light are too fast, and imaging displacement occurs, resulting in poor measurement accuracy. In order to improve the accuracy of optical measurement, an optical imaging displacement measurement method based on differential excitation is proposed. Firstly, the edge of the collected optical image is detected, and the grayscale of the pixel is adjusted by the active contour to form a closed optical imaging edge contour. Then, the difference of the gray level of the displacement is measured according to the edge contour feature. The differential excitation method is used to calculate the gradient of the optical imaging displacement control point. The edge contour of the imaging is corrected. Combining with the projection vector of the nuclear space, Displacement measurement. Finally, the simulation test is carried out. The results show that the method of optical imaging displacement measurement has higher accuracy and less measurement error.