A high-resolution line sensor-based photostereometric system for measuring jaw movements in 6 degrees of freedom.
A high-resolution line sensor-based photostereometric system for measuring jaw movements in 6 degrees of freedom.
复制标题
基于高分辨率线传感器的光立体测量系统，用于测量 6 个自由度的下颌运动。
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
K. Ishioka
中科院分区：
文献类型：
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作者：
T. Hayashi;M. Kurokawa;M. Miyakawa;T. Aizawa;A. Kanaki;A. Saitoh;K. Ishioka
光立体测量法已被广泛应用于下颌六自由度运动的测量。为了提高测量的精度，我们开发了一种系统，该系统利用冗余安装在钳口上的小LED和一个5000像素的线阵电荷耦合器件(CCD)作为光传感器。通过连接面弓，在钳口上安装了总共八个LED，每组四个，每个重约55克。LED的位置由两组三个CCD摄像机在三维上检测，这些摄像机位于两侧。根据测量到的所有LED的位置以最小二乘法估计下颌骨的位置和方向，从而有效地减少了测量误差。通过各种精度验证试验，认为所有齿点和髁点的静态总体精度分别在0.19 mm和0.34 mm以内。
Photostereometry has widely been applied to the measurement of mandibular movements in 6 degrees of freedom. In order to improve the accuracy of this measurement, we developed a system utilizing small LEDs mounted on the jaws in redundant numbers and a 5000 pixel linear charge-coupled device (CCD) as a photo-sensor. A total of eight LEDs are mounted on the jaws, in two sets of four, by means of connecting facebows, each weighing approximately 55 g. The position of the LEDs are detected in three-dimensions by two sets of three CCD cameras, located bilaterally. The position and orientation of the mandible are estimated from the positions of all LEDs measured in the sense of least-squares, thereby effectively reducing the measurement errors. The static overall accuracy at all tooth and condylar points was considered to lie within 0.19 and 0.34 mm, respectively, from various accuracy verification tests.