摘要
提出了两种在激光片光三维传感中降低散斑噪声、提高深度分辨率的方法。第 1种方法采用宏观上相同、微观上受物体微结构面元影响的多帧散斑图像叠加 ,用于三维测量系统的标定。第 2种方法利用动态采集方式 ,使CCD对微结构元进行时间积分 ,可有效地降低散斑噪声的影响。实验证明 ,综合利用这两种方式 。
Methods of reducing the speckle noise and improving the depth resolution in optical 3-D profilometry with laser sheet are proposed in the paper.Speckle is caused by object’s micro-structure,with more less-correlated random structure co-interference in the imaging field,the speckle can be depressed greatly.As proved by experiments,combined the method of appreciably sacrificing the lateral resolution and dynamic image capture,the depth resolution can be effectively improved.
出处
《激光技术》
CAS
CSCD
北大核心
2004年第2期196-198,224,共4页
Laser Technology
关键词
激光片光
三维传感
散斑
光学三角测量
laser sheet
laser triangulation
3-D optical profilometry
speckle
