• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied optics >Shape measurement with one fringe pattern recording including a digital master
【24h】

Shape measurement with one fringe pattern recording including a digital master

机译：带有一个条纹图案记录的形状测量，包括一个数字母版

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present a method in which the 3D shape of an object can be measured and compared to the shape of the digital master of the object, e.g., the computer-aided design model. The measurement is done using a stereo camera system and a single projected fringe pattern. Because the digital master is available, i.e., the expected shape is known, only one projection and image recording is necessary; thus, the method becomes fast. The idea in this work is to find homologous points in the cameras, i.e., points corresponding to the same object point, using the object information. An algorithm to find the homologous points is presented and a method to calculate shape is described. Given the ambiguity due to the fact that the phase in the images is wrapped, there is a maximum deviation from the master that can be correctly detected. An analytical expression for this deviation is derived. Results from the shape measurement of an object both with and without deviations from the digital master are also presented. In these measurements, where the measurement volume is approximately 1 dm~(3) and the fringe period on the object plane is about 1 mm, the accuracy is approx= +- 40 (mu)m, and a deviation of max approx= +- 1.6 mm can be correctly detected.
机译：我们提出了一种方法，其中可以测量对象的3D形状并将其与对象的数字母版的形状进行比较，例如计算机辅助设计模型。使用立体摄像机系统和单个投影条纹图案进行测量。因为数字母版可用，即已知的形状已知，所以只需要进行一次投影和图像记录;因此，该方法变得很快。这项工作的想法是使用物体信息在摄像机中找到同源点，即对应于相同物体点的点。提出了寻找同源点的算法，并描述了一种计算形状的方法。考虑到由于图像中的相位被包裹而造成的歧义，可以正确检测到与母版的最大偏差。得出该偏差的解析表达式。还显示了对象形状测量的结果，无论是否存在与数字母版的偏差。在这些测量中，当测量体积约为1 dm〜（3），物平面上的条纹周期约为1 mm时，精度约为= +-40μm，最大偏差约为+ -可以正确检测到1.6毫米。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号