线结构光条纹中心全分辩率精确提取方法

线结构光三维坐标测量中，激光条纹中心的提取直接影响测量的分辩率与精度。本文提出了基于灰度阈值法提取条纹全分辩率初值中心，在初值处应用灰度梯度计算光条纹法向，最后在条纹法线方向精确计算光条纹能量中心的方法。实验结果表明，该方法有效地避免了被测体曲率变化大反而提取数据密度小的问题，提高了光条纹受被测物体表面调制后，条纹中心提取的精度，实现了条纹中心的全分辩率精确提取。

Approach for Accurately Extracting the Full Resolution Centers of Structured Light Stripe

Extracting the center of a stripe is one of the key techniques of a structured light measurement system.An approach to increase the extracting resolution for the centers of a laser stripe and the extracting precision is investigated.Firstly,full resolution initial centers of the light stripe is presented based a threshold algorithm.Then,the gray grades of the field along the initial points of the stripe are calculated with a Sobel operator,and the normal direction at the initial points of the stripe is calc...