Vehicle-mounted stereo camera device and method for correcting the same

A vehicle-mounted stereo camera device comprising:

• a first image capturing unit and a second image capturing unit disposed on a vehicle via a holder to cause visual fields to overlap each other;
• a controller that calculates a distance to a body outside the vehicle based on an image captured by the first image capturing unit, on an image captured by the second image capturing unit, and on positions of the first image capturing unit and the second image capturing unit on the vehicle;
• a first geomagnetic detector disposed near the first image capturing unit;
• a second geomagnetic detector disposed near the second image capturing unit;
• and
• a third geomagnetic detector disposed on the holder,
• wherein the controller compares a geomagnetic value detected by the first geomagnetic detector with a geomagnetic value detected by the third geomagnetic detector to detect a displacement amount of the first image capturing unit, and based on the displacement amount of the first image capturing unit, the controller changes a cutout position in the image captured by the first image capturing unit, and
• the controller compares a geomagnetic value detected by the second geomagnetic detector with the geomagnetic value detected by the third geomagnetic detector to detect a displacement amount of the second image capturing unit, and based on the displacement amount of the second image capturing unit, the controller changes a cutout position in the image captured by the second image capturing unit.