Authenticity determination support device, authenticity determination device, computer readable medium, and authenticity determination support method

1. An authenticity determination support device comprising:

an acquiring unit that photographs, in a solid having a unique random feature in a surface thereof, an area on the surface such that continuity of the unique random feature is generated in a first direction, and thereby acquires feature information representing the unique random feature included in the area; and

a compressing unit that compresses the feature information in a direction in which continuity of the feature information acquired by the acquiring unit is high.

2. The authenticity determination support device according to claim 1 , wherein the acquiring unit includes an irradiating unit that irradiates the area with light to form the shadow of the unique random feature and a photographing unit that photographs the area irradiated with light by the irradiating unit, and

wherein the continuity of the feature information includes continuity of light and shade identified from an image obtained through the photographing by the photographing unit.

3. The authenticity determination support device according to claim 1 , wherein the compressing unit includes a memory that stores continuity information representing the continuity in each of a plurality of directions of the feature information acquired by the acquiring unit, and

wherein the compressing unit compresses the feature information in a direction in which the continuity represented by the continuity information stored in the memory is high.

4. The authenticity determination support device according to claim 3 , wherein the compressing unit further includes an analyzing unit that performs frequency analysis on the feature information in each of the plurality of directions, and

wherein the continuity information corresponds to the result of analysis by the analyzing unit.

5. The authenticity determination support device according to claim 1 , wherein the position of the unique random feature in the area is specified by a two-dimensional coordinate system.

6. The authenticity determination support device according to claim 1 , wherein the position of the unique random feature in the area is specified by a polar coordinate system.

7. The authenticity determination support device according to claim 1 , further comprising:

a compression ratio memory that stores identification information identifying the solid and a compression ratio uniquely set for the solid, with the identification information and the compression ratio associated with each other; and

a receiving unit that receives information corresponding to the identification information,

wherein the compressing unit receives at the receiving unit the information corresponding to the identification information, acquires from the compression ratio memory the compression ratio associated with the identification information corresponding to the received information, and compresses the feature information serving as a compression target with the acquired compression ratio.

8. An authenticity determination device comprising the authenticity determination support device according to claim 1 , wherein the acquiring unit acquires the feature information of a reference target solid serving as a reference for authenticity determination and the feature information of a determination target solid serving as a target of authenticity determination,

wherein the compressing unit compresses, in the direction in which the continuity is high, the feature information of the reference target solid and the feature information of the determination target solid acquired by the acquiring unit, and

wherein the authenticity determination device includes an output unit that outputs a signal indicating that the determination target solid is not a forgery, when the feature information of the determination target solid acquired by the acquiring unit and compressed by the compressing unit corresponds to the feature information of the reference target solid acquired by the acquiring unit and compressed by the compressing unit, and outputs a signal indicating that the determination target solid is a forgery, when the acquired and compressed feature information of the determination target solid does not correspond to the acquired and compressed feature information of the reference target solid.

9. A non-transitory computer readable medium storing a program causing a computer to execute a process for supporting authenticity determination, the process comprising:

photographing, in a solid having a unique random feature in a surface thereof, an area on the surface such that continuity of the unique random feature is generated in a first direction, and thereby acquiring feature information representing the unique random feature included in the area; and

compressing the feature information in a direction in which continuity of the acquired feature information is high.

10. The non-transitory computer readable medium of claim 9 , further storing a program causing a computer to execute an authenticity determination process, the authenticity determination process comprising:

acquiring feature information of a reference target solid serving as a reference for authenticity determination and feature information of a determination target solid serving as a target of authenticity determination;

compressing, in the direction in which the continuity is high, the acquired feature information of the reference target solid and the acquired feature information of the determination target solid; and

outputting a signal indicating that the determination target solid is not a forgery, when the acquired and compressed feature information of the determination target solid corresponds to the acquired and compressed feature information of the reference target solid, and outputting a signal indicating that the determination target solid is a forgery, when the acquired and compressed feature information of the determination target solid does not correspond to the acquired and compressed feature information of the reference target solid.

11. The non-transitory computer readable medium of claim 9 , wherein the compressing further comprises:

storing, in a memory, continuity information representing the continuity in each of a plurality of directions of the acquired feature information, and

compressing the feature information in a direction in which the continuity represented by the stored continuity information is high.

12. An authenticity determination support method comprising:

photographing, in a solid having a unique random feature in a surface thereof, an area on the surface such that continuity of the unique random feature is generated in a first direction, and thereby acquiring feature information representing the unique random feature included in the area; and

compressing the feature information in a direction in which continuity of the acquired feature information is high.

13. The authenticity determination support method of claim 12 , wherein the compressing further comprises:

storing, in a memory, continuity information representing the continuity in each of a plurality of directions of the acquired feature information, and

compressing the feature information in a direction in which the continuity represented by the stored continuity information is high.