METHOD AND SYSTEM FOR DETECTING A SPOOFING ATTEMPT
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United States of America Patent
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Issued Date -
Apr 20, 2023
app pub date -
Sep 28, 2022
filing date -
Sep 28, 2022
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Abstract
A first image is captured by the camera, using a first focus setting and a first aperture size. A first protrusion focus measure in a protrusion area of an object in the first image and a first recess focus measure in a recess area of the object in the first image are determined. A second image is captured by the camera, using the first focus setting and a second aperture size, and the object is detected. A second protrusion focus measure and a second recess focus measure are determined in the second image. A protrusion focus difference between the first and second protrusion focus measures, and a recess focus difference between the first and second recess focus measures are calculated. The protrusion focus difference and the recess focus difference are compared and if they differ by less than a predetermined threshold amount, it is determined that the object is fake.
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