CALIBRATION DEVICE AND METHOD FOR CALIBRATING A DENTAL CAMERA
    1.
    发明申请
    CALIBRATION DEVICE AND METHOD FOR CALIBRATING A DENTAL CAMERA 审中-公开
    校准装置和校准牙科相机的方法

    公开(公告)号:US20150288952A1

    公开(公告)日:2015-10-08

    申请号:US14440478

    申请日:2012-11-04

    Abstract: The invention relates to a method and a calibration device for calibrating a dental camera (1), which is based on a fringe projection method for optically measuring a dental object (10) in three dimensions, comprising a projection grid (2) for generating a projection pattern (3) that consists of a plurality of fringes (5), and an optical system (4) that projects the generated projection pattern (3) onto the object (10) to be measured. In a first step, a reference surface (74) with known dimensions is measured by the dental camera (1) using the fringe projection method. Actual coordinates (33, 36) of a plurality of measurement points (11) are determined on the reference surface (74), and the determined actual coordinates (33, 36) are compared to target coordinates (34) of the measurement points (11) on the reference surface (74). In the following method step, proceeding from the deviations (35, 37) between the actual coordinates (33, 36) and the target coordinates (34), a plurality of compensation values (40, 50, 51, 52, 53) are calculated for the individual fringes (5) of the projection pattern (3).

    Abstract translation: 本发明涉及一种用于校准牙科照相机(1)的方法和校准装置,其基于用于三维光学测量牙科物体(10)的边缘投影方法,该方法和校准装置包括投影栅格(2),用于产生 由多个条纹(5)组成的投影图案(3)和将所生成的投影图案(3)投影到被测量物体(10)上的光学系统(4)。 在第一步骤中,使用边缘投影法通过牙科相机(1)测量具有已知尺寸的参考表面(74)。 在参考表面(74)上确定多个测量点(11)的实际坐标(33,36),并将确定的实际坐标(33,36)与测量点(11)的目标坐标(34)进行比较 )在参考表面(74)上。 在下面的方法步骤中,从实际坐标(33,36)和目标坐标(34)之间的偏差(35,37)开始,计算多个补偿值(40,50,51,52,53) 用于投影图案(3)的各个条纹(5)。

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