Identification method, identification system, matching device, and program

• US 9,760,771 B2
• Filed: 03/28/2014
• Issued: 09/12/2017
• Est. Priority Date: 04/04/2013
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ishiyama, Rui
• Primary Examiner(s): Azarian, Seyed
• Application Number:
  US14/781,990
• Publication Number:
  US 20160048730A1
• Time in Patent Office: 1,264 Days
• Field of Search: 382100, 382103, 382106, 382108, 382111, 382152, 382155, 382162, 382168, 382173, 382180-181, 382189-190, 382199, 382219, 382224, 382232, 382243, 382254, 382274, 382305, 382312, 382141, 382154, 257 48, 705 2661, 235494, 347107
• CPC Class Codes: G06K 7/1447 extracting optical codes from image or text carrying said optical code
• CPC Class Codes: G06V 10/22 by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition
• CPC Class Codes: G06V 20/80 Recognising image objects characterised by unique random patterns
• CPC Class Codes: G06V 2201/07 Target detection
• CPC Class Codes: G06V 2201/09 Recognition of logos

Abstract

The present invention addresses the problem of acquiring information regarding a component or product and identifying said component or product easily and inexpensively. The present invention has an image-feature storage, an extracting means, an acquiring means, and an identifying means. The image-feature storage stores image features of texture patterns formed on components or products. The extracting means extracts an n-dimensional-symbol image and a texture-pattern image from a taken image containing at least the following: an n-dimensional symbol (n being a natural number) that represents information regarding a component, a product, or a product comprising said component; and a texture pattern formed on said component or product. The acquiring means acquires, from the extracted n-dimensional-symbol image, the aforementioned information regarding the component or product. The identifying means identifies the component, product, or component-comprising product by matching image features of the extracted texture-pattern image against the image features stored by the image-feature storage.

Claims

1. An information acquisition and identification system comprising:

an image characteristics storage configured to store image characteristics of textured patterns formed over an n-dimensional symbol displaying information on a part, a product, or a product including the part as its component on component or products, wherein n is a natural number; and

a processor programmed to;

extract an image of the n-dimensional symbol and an image of a textured pattern over the n-dimensional symbol from an image including at least the n-dimensional symbol and a textured pattern formed on the part or the product;

acquire information on the part or the products from the extracted image of the n-dimensional symbol;

identify the part, the product, or the product including the part as its component by matching image characteristics of the extracted image of the textured pattern with image characteristics stored in the image characteristics storage; and

extract the image of the textured pattern by removing a high frequency component corresponding to granularity of a satin finished surface from a captured image and taking a difference between the captured image and an image captured after the high frequency component is removed.

2. The information acquisition and identification system according to claim 1,

wherein the textured pattern is formed in order to identify the part, the product, or the product including the part as its component.

3. The information acquisition and identification system according to claim 1,

wherein the textured pattern is formed on a portion at a position determined by the n-dimensional symbol.

4. An information acquisition and identification system according to claim 1,

wherein granularity of the textured pattern is smaller than a short side of a cell of the n-dimensional symbol.

5. The information acquisition and identification system according to claim 4,

wherein the textured pattern is provided on each of at least one die with predetermined granularity in order to identify a die used in manufacturing;

and

wherein each individual is processed, in order to identify the each individual manufactured by a same die, with granularity smaller than the granularity at the time of processing the each of the at least one die.

6. The information acquisition and identification system according to claim 1,

wherein the processor is further programmed to:

form the textured pattern in order to identify the part, the product, or the product including the part as its component; and

capture an image of the formed portion.

7. The information acquisition and identification system according to claim 1,

wherein the captured image and images of image characteristics stored in the image characteristics storage means are to be captured under a same lighting conditions.

8. The information acquisition and identification system according to claim 7,

wherein an image is captured under the lighting conditions that a portion of a surface in a covering portion is blacken, the portion of the surface being corresponding to a range within a prescribed angular range from a normal direction and facing to a forming surface of the textured pattern, the covering portion being formed so as to cover the forming surface of the textured pattern, and that surfaces corresponding to a range within another angular ranges are set to light source area-including surfaces for dispersing and emitting light received from a light source.

9. The information acquisition and identification system according to claim 1,

wherein the processor is further programmed to:

normalize the captured image by using the n-dimensional symbol.

10. The information acquisition and identification system according to claim 1,

wherein the n-dimensional symbol indicates identification information for identifying an origin or each individual of the part, the product, or the product including the part as its component;

wherein the image characteristics storage stores the identification information and image characteristics of the textured pattern formed on the part, the product, or the product including the part as its component after they are associated with each other; and

wherein the processor is further programmed to identify the part, the product, or the product including the part as its component of a captured image by matching the image characteristics of the textured pattern corresponding to the identification information of the n-dimensional symbol acquired from the captured image with the image characteristics of the textured pattern extracted from the captured image.

11. The information acquisition and identification system according to claim 1,

wherein the image characteristics storage and the processor are provided in an identification server,

wherein the n-dimensional symbol indicates a URL of the identification server

wherein the processor is further programmed to acquire the URL of the identification server from the extracted image of the n-dimensional symbol and transmits the captured image or the extracted image of the textured pattern to the identification server, and

wherein the identification server identifies the part, the product, or the product including the part as its component by using the captured image or the extracted image of the textured pattern.

12. The information acquisition and identification system according to claim 1,

wherein the n-dimensional symbol indicates at least one of a serial number, a name of manufacturer, a name of producer, a brand name, a product name, a product number, a rod number, and a URL.

13. A processing system comprising:

a processor programmed to;

form a textured pattern for identifying a part, a product, or a product including the

part as its component over an n-dimensional symbol displaying information on the part or the product, wherein n is a natural number,

wherein the textured pattern is provided on each of at least one die with predetermined granularity in order to identify a die used in manufacturing,

wherein each individual is processed, in order to identify the each individual manufactured by a same die, with granularity smaller than the granularity at the time of processing the each of the at least one die, and

wherein the textured pattern is formed in order to identify the part, the product, or the product including the part as its component.

14. The processing system according to claim 13,

wherein the processor is further programmed to form a textured pattern having granularity smaller than a short side of a cell of the n-dimensional symbol on the part, the product, or the product including the part as its component to which the n-dimensional symbol which indicates information on the part or the products is attached.

15. The processing system according to claim 13,

wherein the processor is further programmed to form the textured pattern on a portion at a position determined by the n-dimensional symbol.

16. The processing system according to claim 15,

wherein the processor is further programmed to form the textured pattern in a manner that granularity of the textured pattern is smaller than a short side of a cell of the n-dimensional symbol.

17. A registration system comprising:

a processor programmed to;

capture, an image including at least an n-dimensional symbol which indicates information on a part, a product, or a product including the part as its component, and a textured pattern having granularity smaller than a short side of a cell of the n-dimensional symbol, the textured pattern being formed over the n-dimensional symbol, under specific image capturing conditions, wherein n is a natural number;

extract an image of the textured pattern from the captured image; and

register in storing means identification information for identifying the part or the products and image characteristics of the extracted image of the textured pattern after they are associated with each other,

wherein the textured pattern is provided on each of at least one die with predetermined granularity in order to identify a die used in manufacturing,

wherein each individual is processed, in order to identify the each individual manufactured by a same die, with granularity smaller than the granularity at the time of processing the each of the at least one die, and

wherein the textured pattern is formed in order to identify the part, the product, or the product including the part as its component.

18. The registration system according to claim 17,

wherein the textured pattern is formed on an area at a position determined by the n-dimensional symbol.

19. A matching device comprising:

a processor programmed to

extract an image of an n-dimensional symbol and an image of a textured pattern from an image including at least the n-dimensional symbol for displaying information on a part, a product, or a product including the part as its component and the textured pattern formed over the n-dimensional symbol, wherein n is a natural number;

acquire information on the part or the products from the extracted image of the n-dimensional symbol;

acquire and output a check result obtained by checking the extracted image of the textured pattern against a database which stores image characteristics of textured patterns formed on component or products; and

extract the image of the textured pattern by removing a high frequency component corresponding to granularity of a satin finished surface from a captured image and taking a difference between the captured image and an image captured after the high frequency component is removed.

20. An information acquisition and identification method comprising:

extracting, by using a processor, an image of an n-dimensional symbol and an image of a textured pattern from an image including at least the n-dimensional symbol for displaying information on a part, a product, or a product including the part as its component and the textured pattern formed over the n-dimensional symbol, wherein n is a natural number;

acquiring, by using the processor, information on the part or the products from the extracted image of the n-dimensional symbol;

identifying, by using the processor, the part or a product including the product as its component by using image characteristics of the extracted image of the textured pattern; and

extracting, by using the processor, the image of the textured pattern by removing a high frequency component corresponding to granularity of a satin finished surface from a captured image and taking a difference between the captured image and an image captured after the high frequency component is removed.

21. A non-transitory computer readable storage medium Storing program for causing a computer to execute

extraction processing extracting an image of an n-dimensional symbol and an image of a textured pattern from an image including at least the n-dimensional symbol for displaying information on a part, a product, or a product including the part as its component and the textured pattern formed over the n-dimensional symbol, wherein n is a natural number;

acquisition processing acquiring information on the part or the products from the extracted image of the n-dimensional symbol;

acquisition and output processing acquiring and outputting a check result obtained by checking the extracted image of the textured pattern against a database which stores image characteristics of the formed textured pattern; and

extracting processing extracting the image of the textured pattern by removing a high frequency component corresponding to granularity of a satin finished surface from a captured image and taking a difference between the captured image and an image captured after the high frequency component is removed.