Information terminal device, method, computer readable medium storing program and data signal embedded with the program

Abstract

An information terminal device includes an acquisition unit that acquires reference information representing a machine-readable feature distributed on a surface of a thing associated with a first user, and collation information representing a machine-readable feature distributed on a surface of a thing associated with a second user, a registration unit that registers the reference information acquired by the acquisition unit from the thing associated with the first user in a storage unit, a collation unit that uses the collation information acquired by the acquisition unit from the thing associated with the second user, and collates the collation information with the reference information, and a judgment unit that judge validity of whether the second user is the first user, based on a result of collation by the collation unit.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments of the present invention will be described in detail on the basis of the following figures, wherein:

FIG. 1 is a block diagram showing an example of the configuration of an information terminal device according to an exemplary embodiment of the present invention;

FIG. 2 is a flowchart showing the sequence of registration processing;

FIG. 3 is a view showing the image of shooting the surface of a solid;

FIG. 4 is a view showing a concrete example of a solid as an object of photographing;

FIG. 5 is an imaginary view visualizing an example of reference image data;

FIG. 6 is a table showing an example of registration of reference image data;

FIG. 7 is a flowchart showing the sequence of authentication processing; and

FIG. 8 is a flowchart showing the sequence of deletion processing.

Claims

1. An information terminal device, comprising: an acquisition unit that acquires reference information representing a machine-readable feature distributed on a surface of a thing associated with a first user, and collation information representing a machine-readable feature distributed on a surface of a thing associated with a second user ;a registration unit that registers the reference information acquired by the acquisition unit from the thing associated with the first user in a storage unit;a collation unit that uses the collation information acquired by the acquisition unit from the thing associated with the second user, and collates the collation information with the reference information; anda judgment unit that judge validity of whether the second user is the first user, based on a result of collation by the collation unit.

2. The information terminal device according to claim 1, wherein the acquisition unit includes a photographing unit that generates image data functioning as the reference information and the collation information by reading light that is reflected on the surface of the thing or penetrates the solid when the thing is irradiated with light.

3. The information terminal device according to claim 1, wherein pieces of the reference information acquired by the acquisition unit from a plurality of things associated with the first user can be registered in the storage unit as pieces of the reference information respectively.

4. The information terminal device according to claim 1, wherein the registration unit that deletes the reference information registered by registration unit in the storage unit.

5. The information terminal device according to claim 1, wherein the registration unit that decides approval or disapproval of registration of a new piece of the reference information or deletion of the relevant already registered piece of the reference information based on the validity of the user judged by collation of the one or more pieces of the reference information and the collation information.

6. The information terminal device according to claim 1, wherein the collation unit obtains a correlation value showing similarity between the collation information and the reference information, and collates the collation information with the reference information on the basis of the correlation value.

7. The information terminal device according to claim 6, wherein a size of a region of the reference information is smaller than a size of a region of the collation information; andthe collation unit sets a window of the same size as the region of the reference information in the region of the collation information, moves a position of the window in the region of the collation information while repeatedly computing the correlation value showing the similarity between the collation information and the reference information extracted at each of the window positions, and collates the collation information with the reference information on the basis of the correlation value.

8. The information terminal device according to claim 1, wherein the machine-readable feature is asperities of the surface of the thing or a dot pattern formed on the surface of the thing.

9. A computer readable medium storing a program causing a computer to execute process, the process comprising: acquiring reference information representing a machine-readable feature distributed on a surface of a thing associated with a first user;registering the reference information;acquiring collation information representing a machine-readable feature distributed on a surface of a thing associated with a second user;collating collation information with the reference information; andjudging validity of whether the second user is the first user, based on a result of the collation.

10. A computer data signal embodied in a carrier wave for enabling a computer to perform a process, the process comprising: acquiring reference information representing a machine-readable feature distributed on a surface of a thing associated with a first user;registering the reference information;acquiring collation information representing a machine-readable feature distributed on a surface of a thing associated with a second user;collating collation information with the reference information; andjudging validity of whether the second user is the first user, based on a result of the collation.

11. A personal authentication method, comprising: acquiring reference information representing a machine-readable feature distributed on a surface of a thing associated with a first user;registering the reference information;acquiring collation information representing a machine-readable feature distributed on a surface of a thing associated with a second user;collating collation information with the reference information; andjudging validity of whether the second user is the first user, based on a result of the collation.