| 摘要 |
The present invention improves the accuracy of three-dimensional measurement by suppressing misalignment between a measurement point that is input to one viewpoint image and a corresponding point that is set in the other viewpoint image. A measurement point (7), which serves as a reference for three-dimensional measurement, is input to a left viewpoint image (6L). A corresponding point (8a) is set on an extension line that is extended horizontally from the measurement point (7) toward a right viewpoint image (6R). If there is vertical misalignment (D) between the left and right viewpoint images (6L, 6R) at the time of positional adjustment by calibration and the straight line (24, 27) that passes through the measurement point (7) and the corresponding point (8a) in the respective viewpoint images (6L, 6R) intersects with the horizontal line at a small angle (theta), the corresponding point (8a) is set incorrectly at a position greatly deviating from the true corresponding point (8). To prevent this, it is determined that left and right viewpoint images (6L, 6R) that result in an angle (theta) smaller than or equal to a threshold (S) are not suitable for three-dimensional measurement, and a warning is issued. |
