KR101259004B1 - calibration device for Deformation of QR-code using camera and thereof. - Google Patents

Abstract

The present invention relates to a QR code distortion correction apparatus and a correction method using a camera, and more particularly, by reading the presence or absence of QR codes located near and far by using a camera mounted on a mobile terminal is recognized as a modified QR code. The present invention relates to a QR code deformation correction apparatus and a correction method using a camera that allows the user to check the information after moving to a web page or storing the QR information storage unit.
QR code distortion correction device utilizing the camera of the present invention,
In the QR code distortion correction device using a camera,
QR code recognition pattern storage unit for storing the QR code recognition pattern information;
A QR code reading unit which reads the presence or absence of a QR code by searching for a QR code recognition pattern in an image taken from a camera by referring to a QR code recognition pattern stored in a QR code recognition pattern storage unit;
A QR code deformation state storage unit which stores the deformation state information of the QR code;
A deformation state checking unit which checks the deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the QR code deformation state storage unit;
A deformation correction unit for correcting the deformation of the QR code when the QR code is deformed as a result of the check by the deformation state checking unit;
And a QR code decoding unit for reading the information by analyzing the QR code corrected by the deformation correction unit.
Through the present invention, by reading the presence or absence of QR codes located in the near and far distance using a camera mounted on a mobile terminal, if it is recognized as a modified QR code, it is corrected by the user to move to the web page or stored in the QR information storage unit It will provide an effect that can be checked at any time later.

Description

Calculation device for Deformation of QR-code using camera and about.}

The present invention relates to a QR code distortion correction apparatus and a correction method using a camera, and more particularly, by reading the presence or absence of QR codes located near and far by using a camera mounted on a mobile terminal is recognized as a modified QR code. The present invention relates to a QR code deformation correction apparatus and a correction method using a camera that allows the user to check the information after moving to a web page or storing the QR information storage unit.

One-dimensional barcodes conventionally used have a limitation in that a large amount of data cannot be stored.

On the other hand, as the input and output devices such as printers, scanners and digital cameras have become popular, research and development on two-dimensional barcodes that can store more data than one-dimensional barcodes are being actively conducted.

That is, attempts have been made to achieve higher efficiency and convenience in conventional methods of data transfer and representation using two-dimensional barcodes in various fields.

The finder pattern of the two-dimensional barcode using the QR code among the conventional standard two-dimensional barcodes is composed of three identical position detection patterns located at the upper left, upper right and lower left portions of the symbol.

QR code symbols are preferentially encoded so that similar patterns are less likely to touch areas outside the symbol so that they can be identified as soon as possible.

In addition, the identification of the three position detection patterns that make up the finder pattern accurately defines the direction of the position of the symbol in the field of view.

However, in the case of a QR code, all three position detection patterns should be found, and if any one of the position detection patterns is damaged, it is difficult to define the position and direction of the symbol.

In particular, when the QR code is photographed with a camera as shown in FIG. 1, the shape of the QR code is deformed according to a short distance, a long distance, and a location.

That is, as illustrated in FIG. 2, deformation may occur in a shorter square, a wider rectangle, etc. than in the case of a short distance, and as shown in FIG. Some are deformed rather than sized, for example in the shape of a rhombus.

In addition, it was inevitable to have other shapes according to the shooting position of the user.

The above-described modification forms a problem in that the QR code cannot be quickly recognized.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

An object of the present invention is to make it easy to recognize the QR code photographed by the camera in the far and side or near.

Another object of the present invention is to enable the user to check the information of the QR code when you want, even if you do not check immediately after shooting the QR code.

In order to achieve the object of the present invention,

QR code distortion correction apparatus using a camera according to an embodiment of the present invention,

QR code recognition pattern storage unit for storing the QR code recognition pattern information;

A QR code reading unit which reads the presence or absence of a QR code by searching for a QR code recognition pattern in an image taken from a camera by referring to a QR code recognition pattern stored in a QR code recognition pattern storage unit;

A QR code deformation state storage unit which stores the deformation state information of the QR code;

A deformation state checking unit which checks the deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the QR code deformation state storage unit;

A deformation correction unit for correcting deformation of the QR code when the QR code is deformed by the deformation state checking unit;

QR code decryption unit for reading the information by interpreting the QR code corrected by the deformation correction unit is configured to solve the problem of the present invention.

QR code distortion correction apparatus and correction method using the camera according to the present invention,

The camera mounted on the mobile terminal reads the presence or absence of QR codes in the near and far distances, and if it is recognized as a modified QR code, it can be corrected and stored at the user's web page or stored in the QR information storage. Will provide a beneficial effect.

1 is an exemplary view showing an example of photographing a QR code through a mobile terminal.
2 is an exemplary view illustrating an example of a modified image when the near field photographing is performed.
3 is an exemplary view showing an example of a modified image during remote shooting.
4 is an exemplary view showing another modified image example.
5 is a block diagram of a QR code distortion correction apparatus using a camera according to an embodiment of the present invention.
6 is a deformation correction block diagram of a QR code distortion correction apparatus using a camera according to an embodiment of the present invention.
7 is a flowchart illustrating a QR code distortion correction method using a camera according to an embodiment of the present invention.
8 is a flowchart illustrating a deformation correction step of the QR code deformation correction method using a camera according to an embodiment of the present invention.

QR code deformation correction apparatus using a camera according to an embodiment of the present invention for achieving the above object,

In the QR code distortion correction device using a camera,

QR code recognition pattern storage unit for storing the QR code recognition pattern information;

A QR code reading unit which reads the presence or absence of a QR code by searching for a QR code recognition pattern in an image taken from a camera by referring to a QR code recognition pattern stored in a QR code recognition pattern storage unit;

A QR code deformation state storage unit which stores the deformation state information of the QR code;

A deformation state checking unit which checks the deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the QR code deformation state storage unit;

A deformation correction unit for correcting the deformation of the QR code when the QR code is deformed as a result of the check by the deformation state checking unit;

And a QR code decoding unit for reading the information by analyzing the QR code corrected by the deformation correction unit.

At this time, the deformation correction unit,

An image acquisition module for obtaining a modified QR code image;

An upper and lower back processing module for processing the upper and lower margins on a horizontal line basis of the modified QR code obtained by the image acquisition module;

Left and right margin processing module for processing the left and right margins based on the vertical line of the QR code processed by the upper and lower bag processing module,

A rectangle forming module configured to form a rectangle by correcting the vertically and horizontally corrected QR codes of the upper and lower back and left and right margins;

It characterized in that it comprises a square forming module for forming a square by adjusting the overall ratio of the rectangular QR code formed by the rectangular forming module.

At this time, the QR code distortion correction device using the present inventors,

By using the camera mounted on the mobile terminal, it is characterized in that the QR code is located in the short and long distance to form a square that can be decrypted when deformation occurs.

In addition, the QR code distortion correction apparatus using a camera according to an additional aspect,

An execution presence operation unit which executes the QR information read by the QR code decoding unit or stores the QR information in the QR information storage unit;

And a QR information storage unit for storing the read QR information.

On the other hand, the QR code distortion correction method using the present inventors,

In the QR code distortion correction method using a camera,

An image capturing step (S100) of capturing an image from a camera;

A QR code presence reading step (S110) of reading a presence or absence of a QR code by searching for a QR code recognition pattern by referring to a QR code recognition pattern stored in a QR code recognition pattern storage unit in the photographed image;

A deformation state checking step (S120) of checking the deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the deformation state storing unit of the QR code;

A deformation correction step (S130) of correcting the deformation of the QR code when the QR code is deformed as a result of the deformation correction unit checking in the deformation state checking unit;

A code decoding step (S140) of reading the information by interpreting the QR code corrected by the QR code decoding unit in the deformation correction unit;

It is characterized in that it comprises the execution step operation step (S150) to execute or execute the QR information read by the QR code decoding unit or stored in the QR information storage unit.

At this time, the deformation correction step,

An image acquisition step (S131) of acquiring the modified QR code image by the image acquisition module;

Upper and lower back processing step (S132), wherein the upper and lower back processing module processes the upper and lower margins on the basis of horizontal lines of the modified QR code obtained from the image acquisition module;

Left and right margin processing step (S133) for processing the left and right margins on the basis of the vertical line of the QR code processed in the upper and lower margin processing module (S133),

Rectangle forming step of the rectangular forming module to form a rectangle by vertical and horizontal correction (S134) and left and right correction (S135) of the upper and lower back and left margin treatment, and

The square forming module is characterized in that it comprises a square forming step (S136) to form a square by adjusting the overall ratio of the rectangular QR code formed in the rectangular forming module.

At this time, the QR code distortion correction method using the camera,

By using the camera mounted on the mobile terminal, it is characterized in that the QR code is located in the short and long distance to form a square that can be decrypted when deformation occurs.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the QR code distortion correction apparatus and the correction method using the present invention camera.

5 is a block diagram of a QR code distortion correction apparatus using a camera according to an embodiment of the present invention.

As shown in FIG. 5, the QR code distortion correction apparatus 100 utilizing the camera of the present invention is provided.

QR code recognition pattern storage unit 110 for storing the QR code recognition pattern information;

A QR code reading unit 120 which reads the presence or absence of a QR code by searching for a QR code recognition pattern in an image photographed by a camera with reference to a QR code recognition pattern stored in a QR code recognition pattern storage unit;

QR code deformation state storage unit 130 for storing the deformation state information of the QR code;

A deformation state checking unit 140 for checking a deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the QR code deformation state storage unit;

A deformation correction unit 150 for correcting deformation of the QR code when the QR code is deformed as a result of the check by the deformation state checking unit;

And a QR code decoding unit 160 for reading the information by analyzing the QR code corrected by the deformation correction unit.

The QR code recognition pattern storage unit 110 stores the QR code recognition pattern information. The stored QR code recognition pattern information relates to a pattern capable of recognizing a QR code, and refers to general QR code pattern information. .

In the QR code recognition pattern storage unit, QR code recognition pattern information is stored in advance.

The QR code reading unit 120 refers to the QR code recognition pattern stored in the QR code recognition pattern storage unit to read the QR code recognition pattern from the image taken by the camera to read whether the QR code exists.

The QR code deformation state storage unit 130 stores the deformation state information of the QR code. As shown in FIGS. 2 to 4, in the case of a short distance, the QR code deformation state storage unit 130 has a wider square and a wider rectangle than the size of the QR code. Deformation may occur, as shown in FIG. 3, in the case of a long distance, a portion of the QR code is deformed, for example, having a rhombus shape, and may have other shapes according to the user's shooting position. It is to store the various types of deformation information that can be generated in the near and far shot as described above and to provide the information so that it can be referred to when the deformation state check unit checks.

The deformation state checking unit 140 checks the deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the QR code deformation state storage unit.

In other words, it is to check what deformation state before the correction to determine how to correct.

The deformation correction unit 150 corrects the deformation of the QR code when the QR code is modified by the deformation state checking unit.

The process of correcting the deformation will be described in detail below.

Thereafter, the QR code reading unit 160 interprets the QR code corrected by the deformation correction unit to read the information.

QR code deformation correction device using a camera having the configuration as described above is to form a square shape that can be decoded when the deformation occurs by reading the presence or absence of QR code located in the near and far distance using the camera mounted on the mobile terminal. .

On the other hand, according to an additional aspect, the execution information operation unit 170 for executing or storing the QR information read by the QR code decryption unit;

Characterized in that it further comprises; QR information storage unit 180 for storing the read QR information.

That is, it executes the QR information read by the QR code decryption unit by the execution presence operation unit or stores it in the QR information storage unit, and provides a screen for operation on the user's mobile terminal to execute immediately or later. To choose.

6 is a deformation correction block diagram of a QR code distortion correction apparatus using a camera according to an embodiment of the present invention.

As shown in Figure 6, the deformation correction unit 150,

Image acquisition module 151 for obtaining the modified QR code image,

Upper and lower back processing module 152 for processing the upper and lower margins on the basis of the horizontal line of the modified QR code obtained by the image acquisition module;

Left and right margin processing module 153 for processing the left and right margins based on the vertical line of the QR code processed by the upper and lower bag processing module,

Rectangular forming module 154 to form a rectangle by correcting the upper and lower back and left and right margin processed QR code up and down and left and right correction,

It is configured to include a square forming module 155 to form a square by adjusting the overall ratio of the rectangular QR code formed by the rectangular forming module.

In other words, the upper and lower white space processing module 152 processes the upper and lower margins on the basis of the horizontal line of the modified QR code obtained from the image acquisition module, to remove the unnecessary upper and lower margin portions on the image that does not have information for decoding. .

Subsequently, the left and right margin processing module 153 processes the left and right margins on the basis of the vertical lines of the QR codes processed by the upper and lower bag processing modules, thereby removing unnecessary left and right margin portions on the image that do not have information for decoding. .

Thereafter, the top and bottom left and right margin processed QR codes by the rectangle forming module 154 are vertically corrected and left and right corrected to form a rectangle.

In other words, it is formed to have a rectangular shape by stretching up and down or right and left.

Then, the square forming module 155 is to form a square by adjusting the overall ratio of the rectangular QR code formed in the rectangular forming module.

In this case, three position detection element patterns, which are patterns for recognizing QR codes, are normally formed and decoded.

7 is a flowchart illustrating a QR code distortion correction method using a camera according to an embodiment of the present invention.

As shown in Figure 7, the QR code distortion correction method using the present inventors,

An image capturing step (S100) of capturing an image from a camera;

A QR code presence reading step (S110) of reading a presence or absence of a QR code by searching for a QR code recognition pattern by referring to a QR code recognition pattern stored in a QR code recognition pattern storage unit in the photographed image;

A deformation state checking step (S120) of checking the deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the deformation state storing unit of the QR code;

A deformation correction step (S130) of correcting the deformation of the QR code when the QR code is deformed as a result of the deformation correction unit checking in the deformation state checking unit;

A code decoding step (S140) of reading the information by interpreting the QR code corrected by the QR code decoding unit in the deformation correction unit;

Execution whether or not the operation unit comprises the execution or non-operation step (S150) for executing the QR information read by the QR code decoding unit or stored in the QR information storage unit.

To explain the operation principle, the QR code reader reads the QR code recognition pattern by referring to the QR code recognition pattern stored in the QR code recognition pattern storage unit in the image (S100) and reads the presence or absence of the QR code (S110). .

At this time, if the read result does not match the QR code recognition pattern, the image is recognized as a normal image, and when the QR code is read, the QR code read by referring to the deformation state information of the QR code stored in the QR code deformation state storage unit The deformation state of the code image is checked (S120).

At this time, if the QR code is not modified, the QR code is immediately decoded, but if the result of the check in the deformation state check unit is a deformation of the QR code, the deformation correction unit corrects the deformation of the QR code (S130).

Thereafter, the QR code reading unit interprets the QR code corrected by the deformation correction unit to read the information (S140).

After that, when the user issues a command to execute the QR information through the execution presence control unit is to move to a web page (S160).

At this time, if the user instructs the user not to execute the QR information through the execution presence control unit will be stored in the QR information storage unit (S150).

In the case of conventional QR code recognition, it is necessary to continuously perform recording for several seconds or more while maintaining the correct distance and angle, so that recognition and time and accurate operation were required. However, in the present invention, distance and When deformation occurs in the captured image regardless of angle and time, it can be immediately corrected and recognized, thereby providing convenience and efficiency in use.

8 is a flowchart illustrating a deformation correction step of the QR code deformation correction method using a camera according to an embodiment of the present invention.

As shown in Figure 8, the deformation correction step,

An image acquisition step (S131) of acquiring the modified QR code image by the image acquisition module;

Upper and lower back processing step (S132), wherein the upper and lower back processing module processes the upper and lower margins on the basis of horizontal lines of the modified QR code obtained from the image acquisition module;

Left and right margin processing step (S133) for processing the left and right margins on the basis of the vertical line of the QR code processed in the upper and lower margin processing module (S133),

Rectangle forming step of the rectangular forming module to form a rectangle by vertical and horizontal correction (S134) and left and right correction (S135) of the upper and lower back and left margin treatment, and

The square forming module is characterized in that it comprises a square forming step (S136) to form a square by adjusting the overall ratio of the rectangular QR code formed in the rectangular forming module.

In other words, the QR code image modified by the image acquisition module is acquired (S131), and the upper and lower margins are processed based on the horizontal line of the modified QR code acquired by the image acquisition module by the upper and lower back processing module (S132).

The upper and lower margins are unnecessary spaces for recognition, so they are removed.

Further, the left and right margins are processed by the left and right margin processing module based on the vertical lines of the QR codes processed by the upper and lower bag processing modules (S133).

Similarly, the left and right margins are unnecessary spaces for recognition, so they are removed.

After that, the upper and lower back and left margin QR codes processed by the rectangle forming module are vertically corrected (S134), and the QR code image is increased to match the vertical line up and down, and the QR code image is increased to match the vertical line up and down. Is to form a rectangle by performing the left and right correction (S135).

Then, the square forming module is to form a square (S136) by adjusting the overall ratio of the rectangular QR code formed in the rectangular forming module.

Through the configuration and operation as described above, using the camera mounted on the mobile terminal, read the presence or absence of the QR code located in the near and far distance, and if it is recognized as a modified QR code, it is corrected and moved to the user's web page or QR information storage. It will provide an effect that can be checked at any time after being stored in the wealth.

On the other hand, the present invention is described as a camera, but not limited to a mobile phone camera camera and the Internet-enabled devices (for example, iPad, digital camera, etc.) to take advantage of the information reading by correcting the QR code by shooting Could be

It will be appreciated by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not restrictive.

The scope of the invention is indicated by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the invention. do.

100: QR code distortion correction device
110: QR code recognition pattern storage unit
120: QR code reading unit
130: QR code deformation state storage unit
140: deformation state check unit
150: strain correction
160: QR code decoding unit
170: Execution presence control unit
180: QR information storage unit

Claims (7)

delete In the QR code distortion correction device using a camera,
QR code recognition pattern storage unit for storing the QR code recognition pattern information;
A QR code reading unit which reads the presence or absence of a QR code by searching for a QR code recognition pattern in an image taken from a camera by referring to a QR code recognition pattern stored in a QR code recognition pattern storage unit;
A QR code deformation state storage unit which stores the deformation state information of the QR code;
A deformation state checking unit which checks the deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the QR code deformation state storage unit;
A deformation correction unit for correcting the deformation of the QR code when the QR code is deformed as a result of the check by the deformation state checking unit;
And a QR code decoding unit for reading the information by interpreting the QR code corrected by the deformation correction unit.
The deformation correction unit,
An image acquisition module for obtaining a modified QR code image;
An upper and lower back processing module for processing the upper and lower margins on a horizontal line basis of the modified QR code obtained by the image acquisition module;
Left and right margin processing module for processing the left and right margins based on the vertical line of the QR code processed by the upper and lower bag processing module,
A rectangle forming module configured to form a rectangle by correcting the vertically and horizontally corrected QR codes of the upper and lower back and left and right margins;
The QR code deformation correction apparatus using a camera, characterized in that it comprises a square forming module for forming a square by adjusting the overall ratio of the rectangular QR code formed by the rectangular forming module.
delete delete delete In the QR code distortion correction method using a camera,
An image capturing step (S100) of capturing an image from a camera;
A QR code presence reading step (S110) of reading a presence or absence of a QR code by searching for a QR code recognition pattern by referring to a QR code recognition pattern stored in a QR code recognition pattern storage unit in the photographed image;
A deformation state checking step (S120) of checking the deformation state of the read QR code image by referring to the deformation state information of the QR code stored in the deformation state storing unit of the QR code;
A deformation correction step (S130) of correcting the deformation of the QR code when the QR code is deformed as a result of the deformation correction unit checking in the deformation state checking unit;
A code decoding step (S140) of reading the information by interpreting the QR code corrected by the QR code decoding unit in the deformation correction unit;
Execution whether or not the operation unit is performed by including the execution or not operation step (S150) to execute the QR information read from the QR code decoding unit or to store in the QR information storage,
The deformation correction step,
An image acquisition step (S131) of acquiring the modified QR code image by the image acquisition module;
Upper and lower back processing step (S132), wherein the upper and lower back processing module processes the upper and lower margins on the basis of horizontal lines of the modified QR code obtained from the image acquisition module;
Left and right margin processing step (S133) for processing the left and right margins on the basis of the vertical line of the QR code processed in the upper and lower margin processing module (S133),
Rectangle forming step of the rectangular forming module to form a rectangle by vertical and horizontal correction (S134) and left and right correction (S135) of the upper and lower back and left margin treatment, and
The square forming module is a QR code deformation correction method using a camera, characterized in that comprises a square forming step (S136) to form a square by adjusting the overall ratio of the rectangular QR code formed in the rectangular forming module.
delete

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