Patent ID: 11877060
Assignee: CYGAMES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 9:
10. An electronic device comprising:
at least one sensor from among a gyro sensor, an acceleration sensor, and an orientation sensor;
an image acquisition unit that acquires an image comprising one or more surroundings of a target object;
a storage unit that stores a reference image that is an image of the target object;
a feature-point position determining unit that determines a plurality of determined positions of a plurality of feature points indicating local feature quantities in the reference image in response to the reference image being placed inside a predetermined region of an image of a space to be acquired by the image acquisition unit;
a feature-point distance calculating unit that repeatedly calculates a plurality of feature-point distances, the feature-point distance calculating unit repeatedly executing a plurality of steps comprising:
obtaining the image of the space acquired by the image acquisition unit,
detecting, from the image of the space acquired by the image acquisition unit, a plurality of detected points corresponding to the plurality of feature points in the reference image, and
calculating a plurality of feature-point distances between the plurality of determined positions of the plurality of detected points corresponding to the plurality of feature points in the reference image and the plurality of determined positions of the plurality of feature points corresponding to the plurality of detected points;

a first judgment unit that judges whether an amount of movement of the electronic device is equal to or less than a predetermined allowable reference value based on an amount of change in a sensor value obtained from the at least one sensor and the plurality of feature-point distances;
a control unit that stores the image of the space, which is acquired by the image acquisition unit, in the storage unit as a desired image in response to the image of the space being judged that the amount of movement of the electronic device is equal to or less than the predetermined allowable reference value; and
a communication unit that sends the desired image to a server that performs an authenticity judgment based on the desired image,
wherein the authenticity judgment determines whether the desired image is not an image acquired by a person different from a user of the electronic device.