COMPARISON METHOD, COMPARISON SYSTEM, COMPUTER, AND PROGRAM

• US 20090169116A1
• Filed: 11/17/2005
• Published: 07/02/2009
• Est. Priority Date: 11/18/2004
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sato, Hideo, Iizuka, Ken
• Granted Patent: US 8,260,060 B2
• Time in Patent Office: Days
• US Class Current: 382/218
• CPC Class Codes: G06T 2207/30004 Biomedical image processing
• CPC Class Codes: G06T 7/37 using transform domain methods
• CPC Class Codes: G06V 10/48 by mapping characteristic values of the pattern into a parameter space, e.g. Hough transformation
• CPC Class Codes: G06V 10/753 Transform-based matching, e.g. Hough transform
• CPC Class Codes: G06V 40/10 Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands

Abstract

A comparison apparatus 2 designates first registration information RT1 inherent to a first parameter obtained by applying generalized Hough transform processing to a registered image AIM based on the set first parameter as the registration information RT1 used for the comparison and, designating second registration information RT1 obtained by applying generalized Hough transform processing to the registered image AIM based on a second parameter different from the first parameter as the registration information RT1 used for the comparison when receiving an instruction for change of the registration information RT1 after the designation, whereby security can be improved.

Claims

1. A comparison method for comparing images by using registered information, including:

a first step of designating a first registration information inherent to a first parameter obtained by processing a registered image based on a set first parameter, as said registration information used for said comparison; and

a second step of, when receiving an instruction for change of said registration information after said designation in said first step, designating second registration information obtained by performing said processing of said registered image based on a second parameter different from said first parameter, as the registration information used for said comparison.

2. A comparison method as set forth in claim 1, further including a third step of performing comparison processing based on an input image and said designated registration information.

3. A comparison method as set forth in claim 1, wherein, in said first step, a generalized Hough transform processing is carried out to said registered image based on said set first parameter to generate said registration information.

4. A comparison method as set forth in claim 3, wherein, in said first step, as the result of said generalized Hough transform, said registration information is generated, said registration information linking, at a picture element position on an image pattern in said registered image, first angle information indicating the angle formed by a straight line perpendicular to a tangent of said image pattern and a straight line passing through said picture element position and parallel to a reference axis, distance information indicating the distance between said picture element position and a set position indicating said set first parameter, and second angle information indicating the angle formed by a straight line including said picture element position and said set position and said reference axis.

5. A comparison method as set forth in claim 2, wherein, in said third step, a third angle information which indicates the angle formed by the straight line perpendicular to the tangent of said image pattern and the straight line passing through said picture element position and parallel to the reference axis at the picture element position on the image pattern in said comparison image is generated;

a picture element position for the comparison judgment is determined based on the distance information linked with said first angle information corresponding to said third angle included in said registration information and the second angle information; and

said comparison processing is carried out based on the result of comparison between a degree of superimposition of the picture element position for the comparison judgment and the set value.

6. A comparison method including;

a first step of applying a generalized Hough transform processing to a registered image based on a set parameter and storing the resultant registration information inherent to said parameter in a storing means; and

a second step of performing a comparison processing based on an input image and the registration information stored in said storing means in said first step.

7. A comparison method for a comparison system including a terminal apparatus and a comparison apparatus for comparing an image input from the terminal apparatus, said method including:

a first step of designating first registration information inherent to a first parameter obtained by processing a registered image based on a set first parameter as said registration information used for said comparison, storing the designated registration information in a first storing means of said comparison apparatus, and then storing the registration information in a second storing means of said terminal apparatus;

a second step of, when receiving an instruction for change of said registration information after said designation in said first step, designating second registration information obtained by performing processing of said registered image based on a second parameter different from said first parameter, as the registration information used for said comparison, and storing the registration information in said first storing means and said second storing means; and

a third step of performing comparison processing based on the image input from said terminal apparatus and the registration information stored in said first storing means, when said comparison apparatus compare the registration information stored in said first storing means and the registration information stored in said second storing means and the result of the comparison is that they coincide.

8. A comparison method as set forth in claim 7, wherein, in said third step, said comparison processing is stopped when the result of comparison is that they do not coincide.

9. A comparison method as set forth in claim 7, wherein, in said first step, the generalized Hough transform processing is carried out to said registered image based on said set first parameter to generate said registration information.

10. A comparison system comprising a terminal apparatus and a comparison apparatus for comparing an image input from the terminal apparatus,

said comparison apparatus comprising:

a first communicating means for data communication with said terminal apparatus;

a first storing means; and

a first controlling means for designating first registration information inherent to a first parameter obtained by processing a registered image based on a set first parameter, as said registration information used for said comparison, at the time of the registration, designating second registration information obtained by performing said processing of said registered image based on a second parameter different from said first parameter, as the registration information used for said comparison, when receiving an instruction for change of said registration information after said designation, storing the registration information in said first storing means, then outputting the registration information via said first communicating means to said terminal apparatus, comparing, at the time of the comparison, the registration information stored in said first storing means and the registration information received from said terminal apparatus via said first communicating means, and performing the comparison processing based on the image received from said terminal apparatus and the registration information stored in said first storing means when the result of the comparison is that they coincide, and

said terminal apparatus comprising;

a second communicating means for performing data communications with said comparison apparatus;

an inputting means for inputting at least said image;

a second storing means; and

a second controlling means for storing said registration information received from said comparison apparatus at the time of the registration via said second communicating means in said second storing means, and transmitting the image input from said inputting means at the time of the comparison and the registration information read out from said second storing means via said second communicating means to said comparison apparatus.

11. A computer for comparing images by using registration information, having a controlling means for designating first registration information inherent to a first parameter obtained by processing a registered image based on a set first parameter, as said registration information used for said comparison, and designating second registration information obtained by performing said processing of said registered image based on a second parameter different from said first parameter, as the registration information used for said comparison, when receiving an instruction for change of said registration information after said designation.

12. A program executed by a computer for comparing images by using registration information, comprising:

a first step of designating first registration information inherent to a first parameter obtained by processing a registered image based on a set first parameter, as said registration information used for said comparison, and

a second step of designating second registration information obtained by performing said processing of said registered image based on a second parameter different from said first parameter, as the registration information used for said comparison, when receiving an instruction for change of said registration information after said designation in said first step.