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3-Dimensional Measurement Technique using a Maxillo-facial Morphology

使用颌面部形态学的 3 维测量技术

基本信息

批准号：
02557083
负责人：
SUZUKI Hiroyuki
金额：
$ 0.64万
依托单位：
School of Dentistry, Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02557083/
关键词：
3-dimension maxillo-facial human head gray cord projection profile measurement image processor liquid crystal

项目摘要

Non-contact and accurate 3-dimensional profile measurement is hi desirable in the fields of mechanical engineering, orthodontics plas reconstructive surgery and human engineering.Important points of the 3-dimensional profile measurement are how obtain all 3-dimensional data as fast as possible, and how convert these data to 3-dimensional coordinates.In this research, we show one technique to enable fast 3-dimensi measurement of a human maxillo-facial morphology. As mentioned before profile of head is one of important concerns in the orthodontics and tic surgery. The principle of our measuring system is based on the Corded Pattern Projection Method. One feature of our system is tha ployment of image processor and fast data processing algorithm to co the image data to 3-D coordinates. Since our system gives data of more forty thousands of points, some fast technique to process a large numb data in a few seconds is needed. Therefore, we introduced a look-up t where all the information abo … More ut the aberration caused by the TV camera and also about the relation between the raster coordinates of the t Pointing and the 3-dimensional coordinates are embedded.Calibration of the camera system : Perspective transformation for gives the relation between 3-dimensional coordinates (x, y, z) and the c sponding raster coordinates (u, v) as the following equation where hij parameters to represents the geometrical configuration of camera sy Already one calibration method is develooed to measure six distingu points whose coordinates are known in advance. Parameters hij can be d mined so that all the data measured satisfy Eq. (1) with the least sp error. Experiments were performed using our system with length 50 c deviation angle between TV cameras and projector decrees. As shown d ters of cylinders were measured with error than + 0.5mm.In this system 3-D data of human maxillo-facial face were compre and stored in the 128 k byte memory. We are now intending to connect data to 3-D data edit system like a market CAD/CAM system so that data more fruitfully. Less

非接触、精确的三维轮廓测量在机械工程、口腔矫形外科和人体工程等领域都是非常重要的。如何尽可能快地获取所有的三维数据，以及如何将这些数据转换为三维坐标，是三维轮廓测量的关键。正如前面提到的，头部侧貌是正畸和抽动手术中的重要问题之一。我们的测量系统的原理是基于绳纹投影法。该系统的一个特点是采用了图像处理器和快速数据处理算法将图像数据转换到三维坐标。由于我们系统提供了超过4万个点的数据，因此需要一些在几秒钟内处理大量数据的快速技术。因此，我们引入了一个查找t，其中所有关于…的信息摄像机系统的标定：透视变换给出了三维坐标(x，y，z)与对应的栅格坐标(u，v)之间的关系，其中Hij参数表示摄像机SY的几何形状，本文提出了一种测量六个已知坐标的标定方法。可以挖掘参数hij，使得所有测量的数据都满足公式。(1)SP误差最小。使用我们的系统进行了实验，电视摄像机与投影仪之间的偏移角长度为50c。在该系统中，人体面部的三维数据被压缩并存储在128K字节的存储器中。我们现在打算将数据连接到3D数据编辑系统，就像市场上的CAD/CAM系统一样，这样数据就会更有成效。较少