激光片光三维传感中提高深度分辨率的方法
Methods of improving the depth resolution in optical 3-D profilometry with laser sheet
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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,深度分辨率可以得到有效的提高。Abstract: 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.