HOLOGRAPHIC BARCODE TARGET GENERATOR
Authentication systems, devices, and methods are provided, which may use a scanner configured to capture an image of an authentication pattern in a predetermined target area; and a hologram generator configured to project a holographic target onto free space in the target area. Moreover, there may be provided a controller configured to process the image and output a determination of whether the authentication pattern meets a predetermined criterion.
1 . A verification device, comprising:
a scanner configured to capture an image of an authentication pattern in a predetermined target area; and
a hologram generator configured to project a holographic target onto free space in the target area.
2 . The verification device according to claim 1 , wherein the hologram generator is disposed such that the holographic target is visible from within a predetermined field of view, and is not visible from outside of the predetermined field of view.
3 . The verification device according to claim 2 , wherein the predetermined field of view subtends a solid angle of between π/128 and π/4 steradians.
4 . The verification device according to claim 1 , wherein the authentication pattern is a two-dimensional barcode.
5 . The verification device according to claim 1 , wherein the holographic target is a static image.
6 . The verification device according to claim 1 , wherein the holographic target is a dynamic image.
7 . A ticket validation system, comprising:
a scanner configured to capture an image of an authentication pattern in of a predetermined target area;
a hologram generator configured to project a holographic target onto free space in the target area; and
a controller configured to process the image and output a determination of whether the authentication pattern meets a predetermined criterion.
8 . The ticket validation according to claim 7 , wherein the controller is configured to:
generate an authentication information from the image;
compare the authentication information with a reference information, the reference information corresponding to the predetermined criterion; and
in a case where the authentication information agrees with the reference information, generate a control signal configured to cause a gate to open.
9 . The ticket validation according to claim 8 , further comprising a memory configured to store the reference information.
10 . The ticket validation according to claim 8 , further comprising communication circuitry configured to receive the reference information from a remote device.
11 . The ticket validation according to claim 7 , further comprising a user interface.
12 . The ticket validation according to claim 11 , wherein the user interface includes a display device configured to display a visual representation of the determination.
13 . The ticket validation according to claim 11 , wherein the user interface includes an audio transducer configured to provide an auditory representation of the determination.
14 . The ticket validation according to claim 7 , further comprising:
a proximity sensor configured to generate a presence detection signal,
wherein the hologram generator is configured to receive the presence detection signal, and to begin projecting the holographic target in a case where the presence detection signal indicates that a user is present in a predetermined location.
15 . An authentication code reading method, comprising:
projecting a holographic target onto free space in a predetermined target area; and
capturing an image of an authentication pattern in the target area.
16 . The method according to claim 15 , further comprising:
extracting an authentication information from the authentication pattern;
comparing the authentication information to a reference information; and
generating an access control signal based on the comparing.
17 . The method according to claim 16 , further comprising:
in a case where the access control signal indicates an access grant, causing a gate to open.
18 . The method according to claim 16 , wherein the authentication pattern is a two-dimensional barcode.
19 . The method according to claim 15 , further comprising:
monitoring the target area to determine that the authentication pattern has entered the target area; and
at a predetermined time after the authentication pattern has entered the target area, performing the capturing.
20 . The method according to claim 15 , wherein the holographic target is configured to be visible from within a predetermined field of view, and not visible from outside of the predetermined field of view.