| 摘要 |
PURPOSE:To measure the inside of the hole of an object work to be measured, etc., and to improve the measurement accuracy by measuring the three- dimensional position of an object point to be measured according to a stereoscopic image of the spot light source of a measured object point teaching means. CONSTITUTION:When the three-dimensional position of the measured object point P at the recessed part 4a of the work which can not be picked up directly by TV cameras 1 and 2 is measured, the indication point 6 of a coordinate teaching pen 5 (measured object point teaching means) is brought into contact with the object point P. Consequently, a switch 8 is closed and respective LEDs 7 of the pen 5 illuminate. In this state, the stereoscopic image of the pen 5 including the LEDs 7 is picked up by the cameras 1 and 2. An image processor 3 calculates a three-dimensional position of each LED 7 according to the bright point parallax between the right and left images of the stereoscopic image of the LED 7. Each LED 7 and the indication point are in known fixed position relation, so when the three-dimensional positions of the respective LEDs 7 are known, the fixed position relation is added to the positions to calculate the three-dimensional position of the indication point 6 at the position which can not be picked up by the cameras 1 and 2, i.e. the object point P. |
