| 摘要 |
PROBLEM TO BE SOLVED: To improve the accuracy of distance measurement to an object by a small-sized stereo camera.SOLUTION: The temperature of a stereo camera is acquired, and the base line length of a camera parameter is corrected in accordance with the temperature. In one embodiment, a sensor module 110 in a camera head unit 100 comprises a stereo sensor 101 and a thermistor 102. A SEEPROM 104 stores calibration data Bduring calibration, and a temperature Tat that time. During using the stereo camera, a CPU 130 in an image processing unit 120 acquires the calibration data, the base line length B, and the temperature Tfrom the SEEPROM 104, and also acquires the current temperature Tas an output value of the thermistor 102. The CPU 130 sets the calibration data as it is in a correction circuit 122, but corrects the base line length Bto a base line length Bcorresponding to Tand sets the base line length Bin a measurement circuit 123. |
