Precise method for extracting center of structured light stripe
Precise method for extracting center of structured light stripe
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发表时间：
2009
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通讯作者：
Chen Cheng-he
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作者：
Chen Cheng-he
图像光条中心的提取效果直接影响线结构光三维坐标测量的精度和效率。提出了一种光条方向与灰度重心法相结合的精确提取方法。首先利用阈值法得到初始光条中心，然后利用灰度梯度法计算光条法线方向，最后利用灰度重心法提取光条中心，最后利用灰度重心法提取光条法线方向。采用灰度重心法提取法矢方向上的精确值，实验证明，该方法能够准确、快速地提取中心，精度达到亚像素级。
Effect of extracting the center of light stripe of image directly affects the precision and efficiency of 3D coordinate measure on line structured light.A precise extracting method that combines the direction for image of light stripe and the gray barycenter method is proposed.Firstly,get the initial centers of stripe with threshold method.Secondly,calculate the normal direction of the light stripe with the method of the gray grads.Finally,detect the precise values on the normal direction by use of the gray barycenter method.It is proved that this extracting method can acutely and quickly detect the center,and the precision is sub pixel.