KR101656941B1 - Method, server and computer program for improving 2d code recognition ratio - Google Patents

Abstract

A method, server and computer program for improving the recognition rate of a two-dimensional code are provided. A service server for improving the recognition rate of a two-dimensional code according to an exemplary embodiment of the present invention includes a two-dimensional code image registration unit for generating and storing a specific angle-based image in a plurality of directions within a specific angle range for one two- A two-dimensional code matching unit for extracting an image of the two-dimensional code received from the user terminal, the two-dimensional code matching unit extracting an image having the largest degree of similarity with the received image, And a two-dimensional code recognizing unit for recognizing the two-dimensional code and providing information matched with the recognized two-dimensional code to the user terminal.

Description

METHOD, SERVER AND COMPUTER PROGRAM FOR IMPROVING 2D CODE RECOGNITION RATIO BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method, a server and a computer program for improving the recognition rate of a two-dimensional code.

The QR (Quick Response) code is designed for the purpose of expanding the amount of information and minimizing the information damage of a one-dimensional barcode, which is well-known as a conventional bar code. The bar code of the existing EAN (European Article Number) / UPC Less than 30 times to as much as 700 times the information was designed to read at a time.

In addition, the error recovery function is included, so even if information is detected even with a little information damage, it is not a problem and it compensates the disadvantages of the existing bar code.

The purpose of this QR code was widely used in the field of production, transportation, storage and sales of products mainly for the purpose of replacing barcode in the early stage by many companies. In recent years, however, It is widely used for personal promotional use.

1 is a diagram illustrating a conventional QR code recognition method.

In the conventional method of recognizing QR codes, the image of the image obtained through the camera is binarized to find a finder pattern in the image. When the QR code is photographed at a position above a certain angle, the finder pattern can not be found, There is a problem that the code recognition fails.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of recognizing a QR code even at a position of a certain angle which does not recognize the QR code in the conventional method.

According to an aspect of the present invention, there is provided a service server for improving a recognition rate of a two-dimensional code, the service server comprising: A two-dimensional code matching unit for extracting an image having the largest degree of similarity with the received image among the stored images of each angle with respect to the image of the two-dimensional code received from the user terminal, And a two-dimensional code recognition unit for recognizing the two-dimensional code of the image and providing the user terminal with information matched with the recognized two-dimensional code.

According to an aspect of the present invention, there is provided a method for enhancing a recognition rate of a two-dimensional code according to an exemplary embodiment of the present invention includes the steps of: (a) (B) extracting an image of the two-dimensional code received from the user terminal, the image having the largest degree of similarity to the received image among the stored angular images; and (c) Recognizing the two-dimensional code of the extracted image, and providing the user terminal with information matched with the recognized two-dimensional code.

According to another aspect of the present invention, there is provided a method for enhancing the recognition rate of a two-dimensional code in a service server, the method comprising: (a) receiving a code registration request including an image of a two- (B) generating a specific angular image of the received image within a specific angle range in a plurality of directions; and (c) storing the generated image in a repository.

According to an aspect of the present invention, there is provided a method for improving a recognition rate of a two-dimensional code, the method comprising the steps of: (a) acquiring an image of a two- (b) transmitting a two-dimensional code registration request including the acquired image to a service server, wherein the image of the two-dimensional code transmitted to the service server is 0 °, and the service server generates and stores a specific angle-based image in a plurality of directions within a specific angle range based on the original image.

In order to achieve the above object, a computer program according to an embodiment of the present invention includes a series of commands for performing the method.

According to the embodiment of the present invention, the recognition rate of the QR code photographed from the side can be greatly improved.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is a diagram illustrating a conventional QR code recognition method.
2 is a diagram illustrating a configuration of a system for improving the recognition rate of a two-dimensional code according to an embodiment of the present invention.
3 is a block diagram illustrating a configuration of a service server for improving a QR code recognition rate according to an embodiment of the present invention.
4 is a flowchart illustrating an operation of a service server for improving a QR code recognition rate according to an exemplary embodiment of the present invention.
5 is a flowchart illustrating an operation of a service server for improving a QR code recognition rate according to another embodiment of the present invention.
FIG. 6 is a flowchart illustrating a process for improving a QR code recognition rate according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" .

Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating a configuration of a system for improving the recognition rate of a two-dimensional code according to an embodiment of the present invention.

The system 100 for improving the two-dimensional code recognition rate according to an exemplary embodiment of the present invention may include a user terminal 110 and a service server 120.

For reference, in the present invention, a two-dimensional code may include various two-dimensional codes such as a Quick Response (QR) code and a combination of a plurality of colors. Hereinafter, a case where a QR code is used as an embodiment of a two- Explain it.

2, the user terminal 110 may include a photographing means such as a camera, and may transmit an image of a QR code photographed by photographing to the service server 120. [

At this time, the user terminal 110 may request registration or request recognition of the image of the photographed QR code to the service server 120.

For reference, when requesting the QR code image registration, it is preferable that the QR code is photographed at the front side.

The user terminal 110 includes a smart phone, a mobile phone, a PDA (Personal Digital Assistant), a portable multimedia player (PMP), a tablet computer, a wearable device, etc., can do.

Meanwhile, the service server 120 can receive the QR code image from the user terminal 110, extract the original QR code matched with the received QR code image, and recognize the extracted QR code.

For this, the service server 120 can generate and store images of various angles with respect to one QR code.

Thereafter, when the QR code image is received from the user terminal 110, the service server 120 extracts an image having the largest similarity among the stored images at various angles, and finds and recognizes an original image of the extracted image.

For reference, the service server 120 may include a cloud server.

3 is a block diagram illustrating a configuration of a service server for improving a QR code recognition rate according to an embodiment of the present invention.

The service server 120 according to an embodiment of the present invention may include a QR code image registration unit 121, a QR code image DB 122, a QR code matching unit 123, and a QR code recognition unit 124 .

When the QR code image registration unit 121 receives a QR code registration request including a QR code image from the user terminal 110, the QR code image registration unit 121 registers the image of a specific angle with respect to the received QR code image And the left / right direction within a specific angle range.

For example, the 'specific angle' may be set to 10 °, and the specific angular range may be -70 ° to 70 ° for the up / down and left / right respectively.

That is, when the photographing angle of the QR code image received from the user terminal 110 is 0 °, the QR code image registration unit 121 registers the QR code image (- 70 °, -60 °, -50 °, -40 °, -30 °, -20 °, -10 °, 0 °, 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 70 ° Can be generated.

For reference, the QR code image registration unit 121 may generate a specific angle-based image within a specific angle range in the diagonal direction as well as the up / down and left / right directions.

At this time, if the position of the QR code is not located at the center of the image, or if the QR code is not photographed from the front (i.e., photographed at a specific angle), the QR code image registration unit 121 registers It is also possible to request the re-photographing by transmitting a message indicating that the position of the QR code is located at the center of the image in the QR code image registration unit 121 or that the photographing angle of the QR code is 0 DEG.

Then, the QR code image registration unit 121 can store the QR code image generated for each specific angle in the QR code image DB 122. [

On the other hand, the QR code image DB 122 can store an angle-specific image of each QR code generated by the QR code image registration unit 121. [

On the other hand, when a QR code recognition request including a QR code image is received from the user terminal 110, the QR code matching unit 123 compares the received QR code among the QR code images for each angle stored in the QR code image registration unit 121 A QR code image having the largest similarity to the image can be extracted and a 0 ° image that is an original image of the extracted QR code image can be extracted.

For reference, the QR code matching unit 123 may transmit a message to the user terminal 110 indicating that the image matching has failed, even if the image has the largest similarity but does not meet the preset threshold value of the similarity degree.

Meanwhile, the QR code recognizing unit 124 recognizes the original image of the QR code extracted by the QR code matching unit 123, and can provide information matched with the corresponding QR code to the user terminal 110

At this time, the QR code recognition unit 124 may transmit the original QR code image together with the information matched with the QR code.

4 is a flowchart illustrating an operation of a service server for improving a QR code recognition rate according to an exemplary embodiment of the present invention.

4 is a process in which the service server 120 generates a QR code image and stores it in the QR code image DB 122. [

First, the service server 120 receives a QR code registration request including a QR code image from the user terminal 110 (S401).

After S401, the service server 120 confirms at least one of the position and direction of the QR code in the received QR code image (S402).

For example, the location of the QR code may be to confirm that the QR code is located at the center of the image, and the direction of the QR code may be such that the QR code is taken at the front of the user terminal 110 Image).

At this time, the service server 120 transmits a message to the user terminal 110 to position the QR code at the center of the image or to photograph the QR code from the front, The position of the QR code itself may be positioned at the center of the image, or the direction of the QR code may be corrected to 0 DEG.

After step S402, the service server 120 generates an image for a specific angle with respect to the received QR code image in a specific angle range in the up / down and left / right directions (S403).

After S403, the service server 120 stores the QR code image generated in S403 in the QR code image DB 122 (S404).

5 is a flowchart illustrating an operation of a service server for improving a QR code recognition rate according to another embodiment of the present invention.

5 is a process in which the service server 120 recognizes the QR code image received from the user terminal 110. [

First, the service server 120 receives a QR code recognition request including a QR code image from the user terminal 110 (S501).

After step S501, the service server 120 checks whether the finder pattern included in the received image is extractable. If the finder pattern extraction is not possible, the service server 120 extracts the received QR code image and each angle stored in the QR code image registration unit 121 The similarity of the star QR code image is calculated (S502).

After S502, the service server 120 extracts a QR code image having the greatest similarity (S503).

After step S504, the service server 120 determines whether the similarity degree of the extracted QR code image is equal to or greater than a preset threshold value of similarity (S504).

If it is determined that the threshold value is greater than or equal to the threshold value (?), The service server 120 extracts the original image of the corresponding QR code image (S505).

After step S505, the service server 120 recognizes the finder pattern of the QR code from the extracted original image and provides the user terminal 110 with information matched with the recognized finder pattern (S506).

If the result of the determination in step S504 is less than the threshold value?, The service server 120 provides a message to the user terminal 110 indicating that the QR code can not be recognized in step S507.

FIG. 6 is a flowchart illustrating a process for improving a QR code recognition rate according to an exemplary embodiment of the present invention.

6, the user terminal 110 transmits the QR code image to the service server 120. The user terminal 110 transmits the QR code image to the service server 120, do.

Then, the service server 120 calculates the similarity between the QR code image received from the user terminal 110 and the QR code image for each angle stored in the QR code image registration unit 121, and extracts the image having the largest similarity.

At this time, if the similarity degree of the extracted image is equal to or higher than the preset threshold value of similarity, the service server 120 extracts the original image of the extracted image, recognizes the finder pattern of the original image, To the user terminal 110.

As described above, the present invention stores an automatically generated image for various directions and angles with respect to one QR code, matches an image having the largest similarity with the QR code image received from the user terminal 110, Can also recognize the QR code photographed by the camera.

Accordingly, it is possible to expect a significantly higher recognition rate than a conventional method of recognizing a QR code photographed at a certain angle or more. Therefore, it is necessary to recognize a QR code of a certain size in a limited space, It is possible to provide an efficient working environment.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: QR code recognition rate enhancement system
110: User terminal
120: service server
121: QR code image registration part
122: QR code image DB
123: QR code matching unit
124: QR code recognition unit

Claims (12)

A service server for improving a recognition rate of a two-dimensional code,
A two-dimensional code image registration unit for generating and storing a specific angle-based image with respect to one two-dimensional code within a specific angle range in a plurality of directions;
A two-dimensional code matching unit for extracting a 0 ° image, which is an original image of an image having the largest degree of similarity to the received image, of each of the stored angular images with respect to the image of the two-dimensional code received from the user terminal; And
And a two-dimensional code recognizing unit for recognizing the two-dimensional code of the extracted 0 ° image and providing information matched with the recognized two-dimensional code to the user terminal,
Wherein the two-dimensional code matching unit comprises:
Calculating a similarity between the image of the two-dimensional code and the image of each angle stored; extracting an image having the largest degree of similarity,
And transmits a message to the user terminal indicating that the image matching has failed if the similarity is less than a preset threshold value of similarity.
delete delete The method according to claim 1,
Wherein the two-
When a two-dimensional code registration request including an image of the two-dimensional code is received from the user terminal,
Wherein when the position of the two-dimensional code in the received image is not located at the center or when the two-dimensional code is not photographed from the front, a message informing the user terminal of the two-dimensional code is transmitted.
The method according to claim 1,
Wherein the two-
When a two-dimensional code registration request including an image of the two-dimensional code is received from the user terminal,
Wherein the position of the two-dimensional code is located at the center of the image when the position of the two-dimensional code in the received image is not centered or the two-dimensional code is not taken in the front, And corrects the photographing angle so that the photographing angle becomes 0 DEG.
A method for a service server to improve a recognition rate of a two-dimensional code,
(a) generating and storing a specific angle-based image for one two-dimensional code in a plurality of directions within a specific angle range;
(b) extracting a 0 ° image, which is an original image of an image having the largest degree of similarity with the received image, of each of the stored angular images with respect to the image of the two-dimensional code received from the user terminal; And
(c) recognizing the extracted two-dimensional code of the 0 ° image and providing the matching information with the recognized two-dimensional code to the user terminal,
Wherein the step (b) comprises: calculating a degree of similarity between the image of the two-dimensional code and the image of each angle stored; extracting an image having the largest degree of similarity,
And transmitting a message to the user terminal indicating that the image matching fails if the similarity is less than a preset threshold value of similarity.
delete delete delete delete delete delete

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