US 12,033,429 B2
Image processing device of determining authenticity of object, image processing method of determining authenticity of object, and storage medium storing program of determining authenticity of object
Tomoaki Matsunami, Kawasaki (JP)
Assigned to FUJITSU LIMITED, Kawasaki (JP)
Filed by FUJITSU LIMITED, Kawasaki (JP)
Filed on Sep. 17, 2021, as Appl. No. 17/478,477.
Application 17/478,477 is a continuation of application No. PCT/JP2019/016869, filed on Apr. 19, 2019.
Prior Publication US 2022/0019771 A1, Jan. 20, 2022
Int. Cl. G06V 40/16 (2022.01); G06V 40/20 (2022.01)
CPC G06V 40/172 (2022.01) [G06V 40/165 (2022.01); G06V 40/168 (2022.01); G06V 40/20 (2022.01)] 14 Claims
OG exemplary drawing
 
1. An image processing device comprising:
one or more memories; and
one or more processors coupled to the one or more memories and the one or more processors configured to:
store, in the one or more memories, a plurality of time-series images that has captured an object when the object is instructed to change an orientation of a face,
extract a face region from each of the plurality of time-series images,
obtain characteristic of changes of pixel values of a plurality of pixels arranged in a certain direction in the face region,
specify an action of the object based on a time-series change in the characteristic of changes obtained from each of the plurality of time-series images, and
determine authenticity of the object based on the action of the object, wherein
the change of the orientation of the face instructed to the object represents turning the face to the right or left,
the certain direction is a right-left direction of the face,
the characteristic of changes of pixel values of the plurality of pixels arranged in the certain direction represents right-to-left symmetry of the pixel values of the plurality of pixels, and
the action of the object is turning the face to right or left, wherein the one or more processors is further configured to:
obtain an aspect ratio of the face region,
when the right-to-left symmetry is within a certain range and the aspect ratio is within a certain range, determine that the face is facing the front with respect to an imaging device that has captured the object,
store, in the one or more memories, the right-to-left symmetry and the aspect ratio when determined that the face is facing the front with respect to the imaging device as reference right-to-left symmetry and a reference aspect ratio, and
specify which of right or left the face is facing based on a time-series change in a difference between right-to-left symmetry obtained after the reference right-to-left symmetry and the reference aspect ratio are stored in the one or more memories, and the reference right-to-left symmetry.