CPC G06T 7/521 (2017.01) [G01B 11/2513 (2013.01); G01B 11/254 (2013.01)] | 10 Claims |
1. A measurement method comprising:
determining a first vector representing a direction from a position of a measured portion that is one of a plurality of portions of a target surface to a position of a principal point of a first lens based on position information representing positions of the plurality of portions, a first image, and a first captured image generated when a first camera captures an image of the target surface in a situation in which a first projector projects the first image onto the target surface via the first lens;
determining a second vector representing a direction from the position of the measured portion to a position of a principal point of a second lens based on the position information, a second image, and a second captured image generated when the first camera captures an image of the target surface in a situation in which a second projector projects the second image onto the target surface via the second lens;
determining a third vector representing a direction from the position of the measured portion to a position of a principal point of a third lens based on the position information, a third image, and a third captured image generated when the first camera captures an image of the target surface in a situation in which a third projector projects the third image onto the target surface via the third lens; and
measuring a normal vector of the measured portion based on the first vector, the second vector, the third vector, a first value representing luminance of the measured portion in a situation in which the first projector projects a fourth image onto the target surface via the first lens, a second value representing the luminance of the measured portion in a situation in which the second projector projects a fifth image onto the target surface via the second lens, and a third value representing the luminance of the measured portion in a situation in which the third projector projects a sixth image onto the target surface via the third lens.
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