公开(公告)号：US06411915B1

公开(公告)日：2002-06-25

申请号：US09360032

申请日：1999-07-23

申请人： Van-Duc Nguyen ,  Victor Nzomigni ,  Charles Vernon Stewart ,  Kishore Bubna ,  Lila Abdessemed ,  Nathalie Claire Poirier

发明人： Van-Duc Nguyen ,  Victor Nzomigni ,  Charles Vernon Stewart ,  Kishore Bubna ,  Lila Abdessemed ,  Nathalie Claire Poirier

IPC分类号： G06F1900

CPC分类号： F01D21/003 ,  G06T7/35 ,  G06T7/80

摘要： A method for calibrating a non-contact range sensor comprises the steps of employing the range sensor to obtain a range image of an object to be inspected. The range image is registered with a reference image of the object thereby providing registered data. The reference image may be derived through computer assisted drawing (CAD) data. Normal deviations between the registered data and the reference image are computed. Noise is filtered from the normal deviations. A plurality of bias vectors and a covariance matrix are estimated based on the normal deviations, stored in memory as a lookup table comprising geometric correction factors for the sensor. Images of the object subsequently obtained by the sensor are compensated in accordance with the lookup table.

摘要翻译： 用于校准非接触式距离传感器的方法包括以下步骤：采用距离传感器来获得被检查物体的范围图像。 范围图像与对象的参考图像一起登记，从而提供注册数据。 参考图像可以通过计算机辅助绘图（CAD）数据导出。 计算注册数据和参考图像之间的正常偏差。 噪声从正常偏差过滤。 基于存储在存储器中的正常偏差来估计多个偏置向量和协方差矩阵，作为包括用于传感器的几何校正因子的查找表。 随后由传感器获得的物体的图像根据查找表进行补偿。