| CPC G06T 7/521 (2017.01) [G06T 7/73 (2017.01); H04N 9/3138 (2013.01); H04N 9/3179 (2013.01); G06T 2207/10028 (2013.01)] | 9 Claims |
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1. A measurement method comprising:
generating first restoration information representing a Euclidean restoration result for a first region of a screen that is a non-planar surface based on a first image that is one of an image input to a first apparatus including a first lens and having known internal parameters relating to the first lens and an image output from the first apparatus, and a second image that is one of an image input to a second apparatus including a second lens and having known internal parameters relating to the second lens and an image output from the second apparatus;
generating second restoration information representing a projection restoration result for a second region of the screen based on a third image that is one of an image input to a third apparatus including a third lens and having unknown internal parameters relating to the third lens and an image output from the third apparatus, and the first image;
generating a three-dimensional projective transformation matrix for transforming coordinates of a plurality of points indicated by the second restoration information into coordinates of a plurality of points indicated by the first restoration information based on the first restoration information and the second restoration information; and
generating third restoration information representing a Euclidean restoration result for the second region based on the second restoration information and the three-dimensional projective transformation matrix,
wherein at least one of the first, second, and third apparatuses is an imaging apparatus that captures an image of the screen, and
at least part of the first region and at least part of the second region overlap with each other in a third region.
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