关键词: 激光技术, 光斑中心, 图像平滑, 目标提取, 灰度重心

Abstract:

Center-determination of laser spot is the key technology of crown placement measurement system because it immediately concerns accuracy of the displacement. First in this paper, by using Matlab software system, the grabbed laser spot image was smoothed with noise cancellation and median filtering to improve separating capacity of the targets and the background, which would set the terms for the object extraction. Then the image was segmented with Canny operator to extract target image from cluttered background. Finally, based on the extracted target, center coordinates of the laser spot could be found by using gray barycenter algorithm.

Key words: laser techniques, spot center, image smoothing, object extraction, gray barycenter