KR102180924B1 - System and Method for Embedding and Extracting Digital Watermark Using QR Code - Google Patents

Abstract

The present invention relates to a digital watermark insertion and extraction system and method using a QR code, comprising: an input unit for receiving original data; A pixel extracting unit that extracts pixels from the original data received from the input unit and displays a color value of each pixel in a binary method; A watermark generator for collecting information related to the original data and generating a watermark in the form of a QR code; A binary allocation unit for binarizing the watermark generated by the watermark generation unit; And a watermark embedding unit for XORing the bits of the original data pixels extracted by the pixel extraction unit and the bits of the watermark binarized by the binary assignment unit. By including, various types of images, audio, and video Data such as etc. can be inserted in a large amount into the original data, and the degree to which the watermark is visible to the naked eye can be easily adjusted.

Description

System and Method for Embedding and Extracting Digital Watermark Using QR Code}

The present invention relates to a system and method for digital watermark insertion and extraction of a watermark, and more particularly, by inserting a QR code as a watermark, more information can be inserted into an original image, and malicious damage or intention value It relates to a digital watermarking method and system using a QR code that can be easily restored even if it is damaged.

Recently, with the development of various smart devices and communication, it is possible to easily share various information, while using digital technology, various digital contents such as music and images can be reproduced easily and simply without qualitative change. . Accordingly, there is a digital watermarking technology as a digital content copyright protection technology for preventing illegal copying of multimedia works and protecting the copyright holder. Here, a watermark is a bit pattern that is inserted into digital content such as image, audio, video data, etc. to identify copyright information about a certain file. That is, watermarking is a special method to protect the rights and interests of data managers. It refers to any technical method of inserting and extracting a watermark in a form (ie, information) so that it cannot be distinguished by the human eye or hearing ability.

Therefore, if general users illegally copy digital information and use it for commercial or other purposes without a legitimate price or permission, the original owner extracts his or her watermark to reveal that it is his or her possession, or once for illegal copying, etc. When any manipulation or modification is applied to the marked data, a technique such as determining forgery of the data can be applied by causing the watermarked portion to be damaged. This is the conclusive evidence of the exercise of property rights.

As described above, such a watermark for protection of works, etc., requires stability and a large amount of various information insertion techniques in order to have robustness against attacks and forgery from various illegal users. However, from this point of view, digital watermarks are not as secure as encryption technology yet, and most of them are in a trade-off state for robustness, information volume, and quality, which is still insufficient to be applied to the entire copyright management technology. It is considered as.

In general, the watermarking technique of the above type is largely classified into two types according to the method of insertion. The first method is a method of embedding a watermark in the frequency domain. It is a method of inserting a watermark by manipulating DCT coefficients obtained after performing Discrete Cosine Transform (DCT). The second method is a method of inserting a watermark in a spatial domain. The watermark is inserted by changing pixel values in the spatial domain, and whether the image is forged or altered is determined through the degree of change of the pixel value.

In addition, other classifications of the existing digital watermarking techniques include a method of inserting a watermark so that it is visible to the naked eye and a method of inserting it so that it is not visible, and a watermark is extracted through a generated key value.

Among the existing digital watermarking techniques, the watermarking method, which is inserted to be visible to the naked eye, is the result of multiplying the watermark and the original image by an appropriate ratio. In this case, complete extraction of the watermark is impossible, and the amount of information to be stored through the watermark is relatively small. Among the existing digital watermarking techniques, the watermarking method of inserting so as not to be visible to the naked eye is relatively more sophisticated than the method of inserting so that it is visible to the naked eye, and has the advantage of extracting the watermark without having the original image. As a result, the amount of watermarking information is small. Also, in the conventional digital watermarking technique, in most cases, a method of inserting a watermark so that the watermark is visible to the naked eye and a method of inserting it invisible are separated.

Korean Patent Application Publication No. 10-2011-0068042 (published on June 22, 2011) Republic of Korea Patent Publication No. 10-2013-0098668 (published on 2013.09.05.)

Accordingly, the present invention has been made to solve the problems of the prior art, and an object of the present invention is to insert a watermark into the original data by using a QR code as a watermark and XOR operation between the original data and the watermark. Digital watermark using QR code that embeds data such as images, audio, and video into the original data in large quantities, and the degree to which the watermark is visible to the naked eye can be easily adjusted, and enhances security by using the resilience of the QR code. It is to provide an insertion and extraction system and method.

In addition, another object of the present invention is any one bit or one or more bits and a watermark bit from the most significant bit (MSB) of the original data pixel to the least significant bit (LSB). It is to provide a digital watermark insertion and extraction system and method using a QR code that can control the degree to which the watermark is visible to the naked eye by performing XOR operation.

A digital watermark embedding system using a QR code of the present invention for achieving the above object includes: an input unit receiving original data; A pixel extracting unit that extracts pixels from the original data received from the input unit and displays a color value of each pixel in a binary method; A watermark generator for collecting information related to the original data and generating a watermark in the form of a QR code; A binary allocation unit for binarizing the watermark generated by the watermark generation unit; And a watermark embedding unit for XORing the bit of the original data pixel extracted by the pixel extracting unit and the bit of the watermark binarized by the binary allocating unit.

In addition, a digital watermark extraction system using a QR code of the present invention includes an input unit for receiving original data and watermarking data; A pixel extracting unit that extracts pixels from the original data and watermarking data received from the input unit and displays a color value of each pixel in a binary method; And a watermark extracting unit for XORing the bits of the original data pixels extracted by the pixel extracting unit and the bits of the watermarking data pixels.

On the other hand, a digital watermark embedding method using a QR code of the present invention includes the steps of: receiving an input unit inputting original data; Extracting pixels from the original data received from the input unit by a pixel extraction unit and representing a color value of each pixel in a binary method; Generating a watermark in the form of a QR code by collecting information related to the original data by a watermark generator; Binarizing the watermark generated by the watermark generating unit by a binary value allocation unit; And inserting the watermark into the original data by performing an XOR operation on the bit of the original data pixel extracted by the pixel extraction unit and the bit of the watermark binarized by the binary assignment unit by a watermark insertion unit. Characterized in that.

On the other hand, a digital watermark extraction method using a QR code of the present invention comprises the steps of: receiving, by an input unit, original data and watermarking data; Extracting pixels from the original data and watermarking data received from the input unit by a pixel extraction unit, and representing a color value of each pixel in a binary method; And extracting a watermark from the watermarking data by performing an XOR operation on the bit of the original data pixel extracted by the pixel extracting unit and the bit of the watermarking data pixel by the watermark extraction unit.

As described above, the digital watermark insertion and extraction system and method using a QR code according to the present invention provides the following effects.

By using the QR code as a watermark and XOR operation of the original data and the watermark to insert a watermark into the original data, various types of image, audio, video, etc. data are inserted in a large amount into the original data, and the watermark is visible to the naked eye. The degree can be easily adjusted.

By performing an XOR operation on the bit of the watermark with any one bit or one or more bits from the most significant bit (MSB) to the least significant bit (LSB) of the original data pixel, the watermark is You can control how much you see with the naked eye.

1 is a block diagram schematically showing the configuration of a digital watermark embedding system using a QR code according to an embodiment of the present invention.
2 is a conceptual diagram showing a series of processes of a digital watermark embedding system using a QR code according to an embodiment of the present invention.
3 is a diagram illustrating a result of a visual effect (visibility) of inserting a watermark into each bit of an original image according to an embodiment of the present invention.
4 is a diagram showing the configuration of a digital watermark embedding system using a QR code according to another embodiment of the present invention.
5 is a conceptual diagram showing a series of processes of a digital watermark embedding system using a QR code according to another embodiment of the present invention.
6 is a diagram showing the configuration of a digital watermark extraction system using a QR code according to an embodiment of the present invention.
7 is a flowchart showing the main steps of a digital watermark embedding method using a QR code according to an embodiment of the present invention.
8 is a flowchart showing the main steps of a digital watermark extraction method using a QR code according to an embodiment of the present invention.

The drawings introduced below are provided as an example to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. In addition, the same reference numbers throughout the specification indicate the same elements.

At this time, unless there are other definitions in the technical terms and scientific terms used, they have the meanings commonly understood by those of ordinary skill in the technical field to which this invention belongs, and the gist of the present invention in the following description and accompanying drawings Description of known functions and configurations that may be unnecessarily obscure will be omitted.

Hereinafter, a digital watermarking system and method using a QR code of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the system and method for digital watermark insertion and extraction according to the present invention, data such as digital content to be watermarked is referred to as original data, and user information inserted to prevent forgery and alteration of the original data Inserted data as the data is referred to as watermark information, and as a result, the data into which the watermark information is inserted is referred to as watermarking data.

1 is a block diagram schematically showing the configuration of a digital watermark embedding system using a QR code according to an embodiment of the present invention.

An embodiment of the present invention is a case where the original image is a gray image. Referring to FIG. 1, the digital watermark embedding system 100 according to an embodiment of the present invention includes a data input unit 110 and a pixel extraction unit 120. ), a watermark generation unit 130, a binary assignment unit 140, and a watermark insertion unit 150. In addition, it may be configured to further include a transmission unit 160, a control unit, a storage unit, and the like.

The data input unit 110 is a means for performing a function of receiving original data such as an image into which a watermark is to be inserted. As a method of receiving an image or the like from the data input unit 110, it is combined with an input means such as a scanner to receive an image from a corresponding device, or information already stored in a storage unit (not shown) (for example, an image , Audio, video data, etc.) to allow the user to select specific information. Data input through the data input unit 110 is provided to the pixel extraction unit 120 to be described later.

The pixel extraction unit 120 receives original data from the input unit 110, extracts each pixel, and displays a color of each pixel in a binary method. Specifically, in the embodiment of the present invention, an 8-bit gray image is illustrated, and the 8-bit gray image uses a total of 2 ⁿ (n: number of bits), that is, 256 levels of achromatic color. 120) performs a function of displaying such color information for each pixel in a binary method. Data processed through the pixel extraction unit 120 is provided to the watermark embedding unit 150 to be described later.

The watermark generation unit 130 may collect information related to digital content in order to insert the watermark information into the original data, and generate each watermark information as a watermark. In particular, in the embodiment of the present invention, a QR code is used as a watermark to be inserted into the original data, and such a QR code can be generated using a known QR code generation program. The generated watermark is provided to the binary allocation unit 140 to be described later.

Here, the QR code (Quick Response Code) is a matrix-type barcode that represents information in a grid pattern. It was developed by Denso Wave in Japan in 1994, and it is widely used in various fields as Denso Wave declared that it will not exercise its patent right. Has become. While existing barcodes only contain limited information such as price and product name according to the capacity limitation, QR codes can contain a variety of three-dimensional information such as voice and video with their strong capacity. Specifically, while existing one-dimensional barcodes can only store numeric information of around 20 characters, QR codes store up to 7,089 numbers, 4,296 characters (ASCII), 2,953 bytes (8 bits), and 1,817 Chinese characters. It has better recognition speed, recognition rate, and resilience than general barcodes.

As described above, in the present invention, by using the QR code as a watermark, even if a part of the watermark is damaged, it is easy to recover errors, thereby improving the stability of the watermark, and inserting more information into the original data. The code has the advantage that high-speed recognition is possible without being affected by the shape or direction of the background because there are three positioning symbols.

The binary allocation unit 140 binarizes the QR code watermark generated by the watermark generation unit 130. Here, binarization refers to classifying all pixels brighter than a predetermined threshold value as white (1) and all pixels that are not as black (0) in image processing. As a method of binarizing image data After investigating the distribution of the intensity of the pixels constituting the image, draw a histogram of it, and assign two values by setting a threshold value to the distribution of the histogram, and the reasoning and algorithm of the gray image using correlation Conference 2005 Proceedings Vol.32, No.1(B)), etc. are disclosed. The watermark binarized by the binary allocation unit 140 is provided to the watermark embedding unit 150 and used as a watermark to be inserted into the original data.

The watermark embedding unit 150 uses the binarized QR code provided from the binary allocation unit 140 as a watermark and changes the pixel values of the original data extracted by the pixel extraction unit 120 in a spatial domain to Can be inserted. Specifically, the watermark embedding unit 150 of the present invention includes bits from the most significant bit (MSB) to the least significant bit (LSB) of the original data pixel extracted by the pixel extracting unit 120. The QR code watermark image binarized by the binary allocating unit 140 by taking any one bit or one or more bits among them and performing an XOR operation. As a result, watermarked data may be generated, and such watermarked data may be provided to the transmission unit 160 to be described later.

The figure below is an illustration for explaining how to insert a watermark into the original data by performing an XOR operation on the pixels of the QR code watermark binarized to the pixels of the original data.

[Drawing]

In the figure, 0 of each bit represents black (minimum contrast, minimum gray level) and 1 represents white (maximum contrast, maximum gray level), and the XOR operation is the total number of 1 of the corresponding bit of the original data and the QR code watermark. It refers to an operation in which the result is 1 only if it is an odd number.

The transmission unit 160 may perform a function of transmitting watermarking data into which the watermark is inserted by the watermark insertion unit 150 to an external medium (eg, an output device, a copyright information insertion server, etc.).

The watermark embedding control unit may connect and manage components in the digital watermark system 100 according to the present invention. For example, the control unit may provide the original data inputted by the data input unit 110 to the pixel extraction unit 120, and the watermark generated by the watermark generation unit 130 is a binary assignment unit 140 ) To generate a binarized QR code watermark. When the binarized QR code watermark is generated, the control unit provides the binarized QR code watermark to the watermark insertion unit 150 to generate watermarking data, and the generated watermarking data is used through an external medium. Can be made.

In addition, although the digital watermark embedding system 100 is illustrated in FIG. 1 as a specific device having a hardware configuration, it may be implemented in the form of a software program that can perform the above-described functions in the same manner. And, when implemented in the form of a software program, the user purchases a separate digital watermark embedding system 100 simply by installing the software program in the user terminal (for example, personal computer, PDA, mobile communication terminal, etc.) Even if you don't, you can expect the same effect.

2 is a conceptual diagram showing a series of processes of a digital watermark embedding system according to an embodiment of the present invention.

Referring to FIG. 2, the watermark embedding system 100 (this includes a user terminal installed with a software program that performs the same function. The same applies hereinafter) extracts original data for each pixel from a region 210, The color of a pixel is represented in binary.

In addition, the watermark embedding system 100 collects watermark information input by the user in the area 230 and converts each watermark information into a QR code watermark. Thereafter, the watermark embedding system 100 binarizes the QR code watermark generated through the area 230 using the binary allocation unit 140.

Thereafter, the watermark embedding system 100 selects one or more arbitrary bits in the range of the least significant bit from the most significant bit of the original data pixel extracted by the pixel extracting unit 120 in the area 220, and then selects the original data pixel in the area 240. Digital watermarking data is generated by performing XOR operation on the bit of and the corresponding binarized bit of the QR code watermark.

The reason for selecting an arbitrary bit from each pixel value of the original data in the area 220 is to control the degree to which the watermark information can be recognized by the human eye. Accordingly, as the watermark is inserted into the most significant bit of the original data pixel value, it becomes a visible watermark, and as the watermark is inserted into the least significant bit, it becomes an invisible watermark.

Accordingly, according to the present invention, when the original data is a low-quality image, it is inserted in a bit close to the most significant bit, and when the original data is a high-quality image, it is inserted in the least-significant bit, thereby facilitating a watermark without impairing the quality of the original data Can be inserted.

FIG. 3 is a diagram illustrating a result of visual effect (visibility) of inserting a watermark on each bit of an original image according to an embodiment of the present invention. Referring to FIG. 3, original data are respectively in the order from top left to bottom right. It shows an image with a QR code inserted into the 2nd to 7th bit of the pixel. In the drawing, when the QR code is inserted into the 0th least significant bit and the 1st and subsequent bits, it is omitted because there is no difference from the original image when viewed with the naked eye.

4 is a diagram showing the configuration of a digital watermark embedding system using a QR code according to another embodiment of the present invention.

Another embodiment of the present invention is a case where the original image is a color image, and the digital watermark embedding system 400 using a QR code according to another embodiment of the present invention includes a data input unit 410, a pixel extraction unit 420, It includes a first watermark generator 430, a second watermark generator 432, a third watermark generator 434, a binary assignment unit 440, and a watermark insertion unit 450. In addition, it may be configured to further include a transmission unit 460, a control unit 470, a storage unit, and the like.

The data input unit 410, the first to third watermark generation units 430, 432, 434, the binary assignment unit 440, the transmission unit 460 and the control unit 470 of the digital watermark embedding system 400 ) Has the same or similar technical configuration as the data input unit 110, the watermark generation unit 130, the binary assignment unit 140, the transmission unit 160, and the control unit, respectively, and the description thereof will be omitted.

The pixel extracting unit 420 receives original data from the input unit 410, extracts each pixel, and divides the color of each pixel by R, G, and B components, and displays a binary method. Specifically, the embodiment of the present invention exemplifies a digital color image in which three channels (R, G, B) each having 8 bits of information to produce a color are exemplified, and this RGB color image is 256 ^m (m: channel Number) That is, 16,777,216 colors can be expressed, and the corresponding pixel extracting unit 420 extracts RGB values for each pixel of the original data and displays such color information in a binary method. Data processed through the pixel extracting unit 420 is provided to the watermark embedding unit 450.

The watermark insertion unit 450 extracts the binarized first watermark, second watermark, and third watermark provided from the binary allocation unit 440, respectively, as original data pixels extracted by the pixel extraction unit 420. Watermarked data can be generated by performing an XOR operation and inserting the R component, G component, and B component of. The watermarked data may be provided to the transmission unit 460.

In this case, FIG. 4 is a case in which the color image is an image composed of RGB. For example, the first watermark, the second watermark, and the third watermark are inserted into each of the R, G, and B components of the color image. In the drawing shown, or the watermark embedding system 400 according to the present invention, an image converted to HSI (Hue, Saturation, Intensity) or HSV (Hue, Saturation, Value) or an image converted to other color coordinates is It is natural that it can be inserted.

5 is a conceptual diagram showing a series of processes of a digital watermark embedding system according to another embodiment of the present invention.

Referring to FIG. 5, the watermark embedding system 400 (this includes a user terminal installed with a software program that performs the same function. The same applies hereinafter) extracts original data for each pixel from an area 510 and determines the color of each pixel. It performs the function of marking R, G, and B components in binary format.

In addition, the watermark embedding system 400 collects watermark information input by the user in areas 530, 532, and 534, and converts the watermark information into a first watermark, a second watermark, and a second watermark in the form of a QR code. 3 Convert to watermark. Thereafter, the watermark embedding system 400 binarizes the QR code watermark generated through the areas 530, 532, and 534 by using the binary value allocation unit 440.

Thereafter, the watermark embedding system 400 selects one or more arbitrary bits in the range of the least significant bit from the most significant bit of the original data pixel extracted by the pixel extracting unit 420 in the area 520, Digital watermarking data is generated by performing an XOR operation on the R component, G component, and B component of the original data pixel, respectively, by 1 watermark, 2nd watermark, and 3rd watermark.

The reason for selecting an arbitrary bit from each pixel value of the cover image in the area 520 is to control the degree to which the watermark information can be recognized by the human eye, as in the area 220.

6 is a diagram showing the configuration of a digital watermark extraction system using a QR code according to an embodiment of the present invention.

6, a digital watermark extraction system 600 according to an embodiment of the present invention is for extracting a QR code from data in which the QR code is inserted as a watermark, and includes a data input unit 610, a pixel extraction unit ( 620) and a watermark extraction unit 630. In addition, it may further include a transmission unit 640, a watermark extraction control unit, and a storage unit.

The data input unit 610 is a means for performing a function of receiving original data, watermarking data, etc., which is combined with an input means such as a scanner to receive an image or the like from a corresponding device, or a storage unit (not shown). There is a method of allowing the user to select specific information from among the information already stored in the device (eg, image, audio, video data, etc.). At this time, the input data is provided to the pixel extracting unit 620 to be described later.

The pixel extracting unit 620 receives original data and watermarking data from the input unit 610, extracts each pixel, and displays a color of each pixel in a binary method. The detailed description is the same as or similar to the pixel extraction unit 120, and data processed through the pixel extraction unit 620 is provided to the watermark extraction unit 630 to be described later.

The watermark extractor 630 may perform an XOR operation on each pixel of the original data and the watermarking data bit by bit to extract a watermark from the watermarked data. The specific operation is the same as the XOR operation of the watermark insertion unit 150, and the extracted watermark may be provided to the transmission unit 640.

The transmission unit 640 performs a function of transmitting the watermark extracted by the watermark extraction unit 630 to an external device.

The watermark extraction control unit may connect and control components in the digital watermark extraction system 600 with each other. Specifically, when original data and watermarking data are input to the data input unit 610, the control unit requests the pixel extraction unit 620 to extract each data for each pixel and express it as bits, and the watermark extraction unit ( 630), the watermark may be extracted from the watermarking data.

In addition, although not shown in FIG. 6, the digital watermark extraction system 600 of the present invention may further include a storage unit for storing watermark information, an operation program, and the like.

In addition, although the digital watermark extraction system 600 is illustrated as a specific device having a hardware configuration in FIG. 6, it may be implemented in the form of a software program that enables the above-described functions to be performed in the same manner. And, when implemented in the form of a software program, the user purchases a separate digital watermark extraction system 600 simply by installing the software program on the user terminal (eg, personal computer, PDA, mobile communication terminal, etc.) Even if you don't, you can expect the same effect.

In addition, the digital watermark embedding system 100 in FIG. 1 and the digital watermark extraction system 600 in FIG. 6 are individually illustrated, and have been described as separate devices, but one hologram including both functions. It is natural that it can be implemented with a watermarking device or a software program.

Since the digital watermart extraction process applied to the present invention can be applied similarly to the reverse process of the digital watermart insertion process described with reference to FIG. 2 above, a detailed description thereof will be omitted.

Hereinafter, a digital watermark embedding method using a QR code of the present invention using the system configured as described above will be described.

7 is a flowchart showing the main steps of a digital watermark embedding method using a QR code according to an embodiment of the present invention.

According to an embodiment of the present invention, when the original image is a gray image, as shown in FIG. 7, when original data is first input from the user to the data input unit 110 (S710), the pixel extraction unit 120 receives the input. Each pixel is extracted from the original data, and the color of each pixel is represented in a binary method (S720).

In addition, the watermark generation unit 130 collects information related to digital content to insert the watermark information into the original data, and generates a watermark in the form of a QR code (S730). Next, the binary allocation unit 140 binarizes the QR code watermark generated by the watermark generation unit 130 (S740). When the generation of the binarized QR code watermark is completed, the watermark insertion unit 150 determines any one bit or one of the bits from the most significant bit to the least significant bit of the original data pixel extracted by the pixel extraction unit 120. Watermarking data is generated by taking the above bits and performing an XOR operation with the QR code watermark image binarized by the binary allocation unit 140 (S750).

8 is a flowchart showing the main steps of a digital watermark extraction method using a QR code according to an embodiment of the present invention.

According to an embodiment of the present invention, when the original image is a gray image, as shown in FIG. 8, when original data and watermarking data are first input from a user to the data input unit 410 (S810), the pixel extraction unit 420 ) Extracts each pixel from the received original data and watermarking data, and represents the color of each pixel in a binary method (S820).

In addition, the watermark extraction unit 430 extracts a watermark from the watermarked data by performing an XOR operation on each pixel of the original data and the watermarking data bit by bit (S830).

Although the present invention has been described in more detail with reference to several embodiments above, the present invention is not necessarily limited to these embodiments, and various modifications may be made without departing from the spirit of the present invention.

100: digital watermark embedding system 110: data input unit
120: pixel extraction unit 130: watermark generation unit
140: binary allocation unit 150: watermark insertion unit
400: digital watermark extraction system 410: data input unit
420: pixel extraction unit 430: watermark extraction unit
500: digital watermark embedding system 510: data input unit
520: pixel extraction unit 530: first watermark generation unit
532: second watermark generation unit 534: third watermark generation unit
540: first binary value allocation unit 542: second binary value allocation unit
544: third binary allocation unit 550: watermark insertion unit

Claims (8)

As a digital watermark embedding system using a QR code that can adjust the degree of watermark visible to the naked eye,
An input unit for receiving original data;
A pixel extracting unit that extracts pixels from the original data received from the input unit and displays a color value of each pixel in a binary method;
A watermark generator for collecting information related to the original data and generating a watermark in the form of a QR code;
A binary allocation unit for binarizing the watermark generated by the watermark generation unit; And
A watermark insertion unit for XORing the bits of the original data pixels extracted by the pixel extracting unit and the bits of the watermark binarized by the binary value allocating unit; and
The watermark embedding unit,
Any one bit or one or more bits from the most significant bit (MSB) to least significant bit (LSB) of the original data pixel extracted by the pixel extractor and the binary allocation A digital watermark embedding system, characterized in that the degree to which the watermark is visible to the naked eye is controlled by performing an XOR operation on a bit of the watermark binarized by the negative. delete As a digital watermark embedding system using a QR code that can adjust the degree of watermark visible to the naked eye,
An input unit receiving original RGB color data;
A pixel extracting unit that extracts a pixel from the original data received from the input unit and displays a color value of each pixel for each of the R, G, and B components in a binary method;
First, second, and third watermark generators for collecting information related to the original data and generating first, second, and third watermarks in the form of a QR code;
A binary allocation unit for binarizing the first, second and third watermarks generated by the watermark generation unit; And
A watermark for XORing the bits of the original data pixel extracted by the pixel extracting unit and the bits of the first, second, and third watermarks binarized by the binary allocation unit for each of R, G, and B components. Including;
The watermark embedding unit,
Any one bit or one or more bits of the bits from the most significant bit to the least significant bit of the original data pixel extracted by the pixel extracting unit for each of R, G, and B components, and the binarization unit A digital watermark embedding system, characterized in that the degree to which the watermark is visible to the naked eye is adjusted by performing XOR operations on bits of the first, second and third watermarks, respectively. delete delete As a digital watermark embedding method using a QR code that can adjust the degree of watermark visible to the naked eye,
Receiving, by an input unit, original data;
Extracting pixels from the original data received from the input unit by a pixel extraction unit and representing a color value of each pixel in a binary method;
Generating a watermark in the form of a QR code by collecting information related to the original data by a watermark generator;
Binarizing the watermark generated by the watermark generating unit by a binary value allocation unit; And
And inserting the watermark into the original data by performing an XOR operation on the bit of the original data pixel extracted by the pixel extraction unit and the bit of the watermark binarized by the binary assignment unit by a watermark insertion unit; and,
The step of inserting the watermark,
The watermark embedding unit includes any one bit or one or more bits of the bits from the most significant bit to the least significant bit of the original data pixel extracted by the pixel extracting unit and the watermark binarized by the binary assignment unit. The digital watermark embedding method, characterized in that the degree to which the watermark is visible to the naked eye is adjusted by performing an XOR operation on a bit.
delete delete

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