CAJ | 학술논문

通过检测激光光斑中心位置偏移的方法来监测路基沉降，是一种便携易布设的方法。而激光光斑中心的检测可以使用重心法、圆拟合、椭圆拟合、高斯曲面拟合。采用重心法运算简单精度低，而采用拟合法精度更高，由于光轴与靶面间存在夹角，光斑更近似看作一椭圆，应用椭圆拟合，辅之以亚像素精度分割，Canny边缘提取后获得了较为理想的沉降监测精度。
통과검측격광광반중심위치편이적방법래감측로기침강，시일충편휴역포설적방법。이격광광반중심적검측가이사용중심법、원의합、타원의합、고사곡면의합。채용중심법운산간단정도저，이채용의합법정도경고，유우광축여파면간존재협각，광반경근사간작일타원，응용타원의합，보지이아상소정도분할，Canny변연제취후획득료교위이상적침강감측정도。
Detecting the location offset of laser spot center method to monitor roadbed settlement is a kind of portable, easy to layout method. Detection laser spot center offset, we can use gravity, circle fitting, ellipse fitting and Gaussian curve fitting, etc method. Gravity algorithm is only involves basic arithmetic and low pre-cise, and ellipse fitting is higher precise. Because of the angle between the optical axis and the target, the laser spot is more approximate as a ellipse. Using the ellipse fitting algorithm, Sub-pixel precise threshold segmenta-tion and Canny edge extraction we obtained an ideal monitoring precise of the roadbed settlement.