Authentication method and system

A non-transitory computer-readable medium storing one or more instructions executable by a computer system to perform operations for authentication, comprising:

• obtaining a first image, wherein the first image is an image of an identification (ID) document captured when the ID document is tilted at a first angle relative to a light source while a light from the light source is projected on the ID document;
• obtaining a second image, wherein the second image is another image of the ID document captured when the ID document is tilted at a second angle relative to the light source while the light from the light source is projected on the ID document;
• and
• authenticating the ID document based on performing operations comprising:
• identifying a first illuminated region of the first image and a second illuminated region of the second image, wherein the first illuminated region is brighter than a remaining area of the first image other than the first illuminated region, and the second illuminated region is brighter than a remaining area of the second image other than the second illuminated region and
• comparing a first position of the first illuminated region and a second position of the second illuminated region to determine whether the first position and the second position are a same position in the ID document, wherein the first position is a center point of the first illuminated region and the second position is a center point of the second illuminated region.

A computer-implemented system for authentication, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, cause the one or more computers to perform one or more operations comprising:
• obtaining a first image, wherein the first image is an image of an identification (ID) document captured when the ID document is tilted at a first angle relative to a light source while a light from the light source is projected on the ID document;
• obtaining a second image, wherein the second image is another image of the ID document captured when the ID document is tilted at a second angle relative to the light source while the light from the light source is projected on the ID document;
• and
• authenticating the ID document based on performing operations comprising:
• identifying a first illuminated region of the first image and a second illuminated region of the second image, wherein the first illuminated region is brighter than a remaining area of the first image other than the first illuminated region, and the second illuminated region is brighter than a remaining area of the second image other than the second illuminated region and
• comparing a first position of the first illuminated region and a second position of the second illuminated region to determine whether the first position and the second position are a same position in the ID document, wherein the first position is a center point of the first illuminated region and the second position is a center point of the second illuminated region.