鉴于Newton-Raphson(N-R)迭代法的数字图像相关方法(DIC)对初值敏感等问题,提出了一种使用SURF(speeded up robust features)特征匹配的数字图像相关方法。SURF算法能匹配出变形前后图像的特征点对,并获得点对的坐标值,使用与匹配点对所在的子区相对应的仿射变换来初始估计子区的变形参数,获得兴趣点的估计值。根据估算的初值进行迭代优化,得到使归一化最小平方距
A three-wavelength lidar system is set up. The backscatter signals of 355, 532, and 1 064 nm are measured simultaneously to derive the optical depth, lidar ratio, and backscatter color ratio of cirrus clouds, respectively. The lidar configuration and the
The 5th Russian_Chinese Workshop on Biophotonics and Biomedical Optics was hosted in Saratov, Russia on 26_28, September, 2012. The bilateral Workshop brought together both Russian and Chinese scientists, engineers and clinical researchers from a variety