激光光斑整形算法

Shaping algorithm for laser spot

为了消除红外激光光斑图像中的后向散射现象或使光斑的灰度分布更加均匀以便于观测,提出了一种基于光斑重心的后向散射抑制算法和一种激光光斑灰度值补偿的算法。基于光斑重心的后向散射抑制算法是在提取光斑重心位置的基础上,确定光斑的半径,最后通过设定的阈值决定图像的灰度值。光斑灰度值补偿算法要在确定光斑边缘点的基础上,计算出光斑中心,再通过光斑的区域能量来修正中心位置并确定光斑半径,最后以光斑中心和半径来矫正光斑区域图像的灰度值。给出两种算法的实验结果及分析,研究证明算法可以基本全部去除光斑图像中的后向散射现象,较好的修正光斑区域的灰度值分布情况,经算法处理后的图像适合应用于进一步的工程实验分析中或是进行实时图像观测。

In order to eliminate the backscattering phenomenon of the infrared laser sport images,or make the distribution of laser spot＇s gray levels reasonable,a backscattering suppression algorithm based on the spot center of gravity and an algorithm for compensating the gray levels of a laser spot were proposed.The backscattering suppression algorithm was based on extracting the laser spot＇s center of gravity.Then,the radius of the laser spot can be determined.Finally,the gray levels of the image should be decided by the set threshold.The algorithm for compensating the gray levels of the laser spot was based on determining the laser spot＇s edge points.Then,the center of the laser spot can be calculated.After that,the center should be corrected through the intensity of regional energy,and the radius of the laser spot would be confirmed.Finally,the gray levels of the laser spot were adjusted through the laser spot＇s center and radius.The experiment results of these two algorithms and their analyses were shown.Research proves that the backscattering suppression algorithm can substantially eliminate the backscattering phenomenon in the laser spot image,and the distribution of laser spot＇s gray levels is improved.The images which are processed by the algorithms are suitable for further analysis in engineering experiments or real-time observation.