US 11,682,128 B2
Face image processing device and face image processing program
Shin-ichi Kojima, Nagakute (JP); Yuya Yamada, Kariya (JP); Shin Osuga, Kariya (JP); Koki Ueda, Kariya (JP); Yuta Kawai, Kariya (JP); Takashi Kato, Kariya (JP); and Yoshiyuki Yamada, Kariya (JP)
Assigned to AISIN SEIKI KABUSHIKI KAISHA, Kariya (JP)
Filed by AISIN CORPORATION, Kariya (JP)
Filed on Mar. 15, 2021, as Appl. No. 17/201,487.
Claims priority of application No. 2020-066196 (JP), filed on Apr. 1, 2020.
Prior Publication US 2021/0312648 A1, Oct. 7, 2021
Int. Cl. G06K 9/00 (2022.01); G06T 7/50 (2017.01); G06T 7/70 (2017.01); G06V 10/764 (2022.01); G06V 10/82 (2022.01); G06V 20/59 (2022.01); G06V 20/64 (2022.01); G06V 40/16 (2022.01)
CPC G06T 7/50 (2017.01) [G06T 7/70 (2017.01); G06V 10/764 (2022.01); G06V 10/82 (2022.01); G06V 20/59 (2022.01); G06V 20/647 (2022.01); G06V 40/161 (2022.01); G06V 40/171 (2022.01); G06T 2207/20084 (2013.01); G06T 2207/30201 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A face image processing device, comprising:
at least one processor configured to implement:
an image coordinate system coordinate value derivation unit configured to detect an x-coordinate value which is a horizontal coordinate value and a y-coordinate value which is a vertical coordinate value respectively in an image coordinate system at a feature point of an organ of a face of a person in an image acquired by imaging the face, and estimate a z-coordinate value which is a depth coordinate value in the image coordinate system, so as to derive three-dimensional coordinate values in the image coordinate system;
a camera coordinate system coordinate value derivation unit configured to derive three-dimensional coordinate values in a camera coordinate system from the three-dimensional coordinate values in the image coordinate system derived by the image coordinate system coordinate value derivation unit; and
a parameter derivation unit configured to apply the three-dimensional coordinate values in the camera coordinate system derived by the camera coordinate system coordinate value derivation unit to a predetermined three-dimensional face shape model to derive a model parameter of the three-dimensional face shape model in the camera coordinate system.