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

Claim 0:
1. A method comprising:
a step of determining a plurality of determined positions of a plurality of feature points indicating local feature quantities in a reference image in response to the reference image being placed inside a predetermined region of an image of a space to be acquired by an image acquisition unit of an electronic device,
wherein the electronic device acquires an image comprising one or more surroundings of a target object, and
wherein the electronic device comprises at least one sensor from among a gyro sensor, an acceleration sensor, and an orientation sensor, the image acquisition unit, and a storage unit for storing the reference image that is an image of the target object;

a calculating step of repeatedly calculating a plurality of feature-point distances, the calculating step repeatedly executing a plurality of steps comprising:
a step of acquiring an image of the space using the image acquisition unit,
a step of 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
a step of calculating the 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 judgment step of judging 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;
an image storing step of storing 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 judgment step for performing 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.