11-01-2018 дата публикации
Номер: US20180012094A1
Принадлежит:
In general, one innovative aspect of the subject matter described in this specification can be embodied in a computer-implemented method. The method includes, detecting, by an imaging device, the presence of an object to be imaged. The method further includes, measuring, by the imaging device, a first characteristic of the object to be imaged, and measuring, by the imaging device, a second characteristic of the object to be imaged. The method further includes, determining, by a computing device, that at least one of the first characteristic of the object or the second characteristic of the object exceeds a threshold; and in response to determining, indicating, by the computing device, whether the object to be imaged is one of a spoofed object or an actual object. 1. A computer-implemented method , the method comprising:detecting, by an imaging device, the presence of an object to be imaged;measuring, by the imaging device, a distance between the imaging device and the object to be imaged;using, by a computing device, the measured distance and at least one feature of the imaging device to determine a characteristic of the object to be imaged;determining, by the computing device, whether the characteristic of the object exceeds a threshold; andindicating, by the computing device, whether the object to be imaged is one of a spoofed object and an actual object.2. The method of claim 1 , wherein the determined characteristic of the object to be imaged is the size of the object.3. The method of claim 1 , wherein the at least one feature of the imaging device includes one of:focal length of a lens of the imaging device,size of an imaging sensor of the imaging device,image pixel resolution of the imaging sensor, andobject size of the image in pixels.4. The method of claim 3 , wherein determining the characteristic of the object to be imaged includes using a width of an image detected by the imaging device and a width of the imaging sensor.5. The method of claim 4 , wherein ...
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