KR20170025184A - System and method for providing service of watermarking-based invisible ring-type image code - Google Patents

System and method for providing service of watermarking-based invisible ring-type image code Download PDF

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KR20170025184A
KR20170025184A KR1020150121218A KR20150121218A KR20170025184A KR 20170025184 A KR20170025184 A KR 20170025184A KR 1020150121218 A KR1020150121218 A KR 1020150121218A KR 20150121218 A KR20150121218 A KR 20150121218A KR 20170025184 A KR20170025184 A KR 20170025184A
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South Korea
Prior art keywords
code
annular
annular code
watermark
image
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KR1020150121218A
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Korean (ko)
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KR101724892B1 (en
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고재필
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금오공과대학교 산학협력단
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Priority to KR1020150121218A priority Critical patent/KR101724892B1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2385—Channel allocation; Bandwidth allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H04N21/8358—Generation of protective data, e.g. certificates involving watermark
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3225—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document
    • H04N2201/3233—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document of authentication information, e.g. digital signature, watermark

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Image Processing (AREA)

Abstract

A system for providing a watermark service according to the present invention includes a capture image which includes an annular code, a watermark service server which generates and inserts the annular code for outputting the capture image and services annular code information, and a user terminal which uses the annular code information by extracting and analyzing the annular code. The capture image is formed by synthesizing the annular code with an original image and includes one of a printed matter type capture image, a photo type capture image, and a picture type capture image. According to the configuration of the present invention, code generation, feature point extraction, code insertion, and code extraction can be easily performed.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an annular code type watermarking service system and method,

The present invention relates to an annular code type watermark service system and a method thereof, and more particularly, to an annular code type watermark service system and method thereof, and more particularly, The watermarking-based invisible image code is used to acquire the related information described above. The related information is encoded into a number of ring bits, where it is further divided into arc bits if necessary, A method of encoding or decoding related information by a code in a method of printing a watermark or a code in a method of repeatedly printing a specific pattern such as a heart or a crowbar on the basis of an arc bit, By using the above-described annular code, and by utilizing the SIFT algorithm that is most optimized for annular code detection, And more particularly, to a watermark-based invisible image code insertion and extraction service system that hardly fails in detection, code insertion, and code extraction.

Generally, a video watermark inserts a watermark in various ways to a video object, and conversely detects an inserted watermark.

However, existing watermarks emphasize invisibility, traction, etc., and complex arithmetic operations are used for their insertion and detection. Therefore, there is a problem that a long calculation time is required for insertion and detection.

In addition, in case of inserting a lot of watermark information, the watermark information can not be inserted in units of frames, which is the minimum unit of the video, in order to prevent deformation of the video because the video is transformed. The amount of information is considerably limited.

Since the detection is not completed before all of the watermark embedded and dispersed, it is impossible to detect the watermark on a frame basis, which is a basic unit of a video object, and therefore, it is impossible to precisely detect the watermark on a frame-by-frame basis.

KR Patent No. 10-2013-0132511

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a watermark service system and method that can easily generate a watermark.

Another object of the present invention is to provide a watermarking service system and method without limitation of the amount of information.

It is another object of the present invention to provide a watermarking service system and method that facilitates insertion of a watermark.

It is another object of the present invention to provide a watermarking service system and method which are easy to extract and interpret a watermark.

According to an aspect of the present invention, there is provided a watermark service system including: a captured image including an annular code; a generating and inserting the annular code to provide an output of the captured image; And a user terminal for extracting and interpreting the annular code and using the annular code information, wherein the captured image is an annular code synthesized with the original image, and the print type captured image, A photo-type capture image, and an image-type capture image.

The watermark service method of the present invention includes the steps of generating an annular code, inserting the annular code to form a captured image, extracting the annular code from the captured image, And interpreting and utilizing the data.

As described above, according to the configuration of the present invention, the following effects can be expected.

First, by designing the code in the form of a ring or an arc, even if an annular code is inserted in the original image, the detection of the characteristic point of the original image is not affected at all.

Second, since the annular code is represented by a combination of the ring bit, the arc bit, and the pattern bit, the expressible information range is the xyz square size of 2, and is not particularly limited by the information amount.

Third, circular codes are optimized for feature extraction and code insertion algorithms, and are also optimized for feature extraction and code extraction algorithms, so there is little chance of failing code insertion and code extraction.

Fourth, when linking with URL information or IP address information with respect to the watermark, the user can be provided with more detailed information by linking with the URL information or IP address information.

1 is a block diagram showing a configuration of an annular code type watermark service system according to the present invention;
Fig. 2 is a plan view showing various configurations of an annular code according to the present invention, that is, (a) a ring bit, (b) an arc bit, and
3 is a flowchart showing an annular code type watermark full service method according to the present invention.
4 is a flowchart showing an annular code generation method according to the present invention;
5 and 6 are flowcharts and examples illustrating a method for detecting feature points for code insertion to generate a code insertion region according to the present invention.
FIGS. 7 and 8 are flowcharts and examples illustrating a method for detecting feature points for code extraction in order to find an annular code in a code embedding area according to the present invention.
FIG. 9 is a code information utilization example according to the present invention. FIG.

Brief Description of the Drawings The advantages and features of the present invention, and how to achieve them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. The dimensions and relative sizes of layers and regions in the figures may be exaggerated for clarity of illustration. Like reference numerals refer to like elements throughout the specification.

Hereinafter, a preferred embodiment of the annular code type watermark service system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram illustrating the configuration of an annular code type watermarking service system according to the present invention.

Referring to FIG. 1, an annular code type watermarking service system 100 includes a watermark 102, a watermark 102, a watermark 102, a watermark 102, And a user terminal 150 that extracts and analyzes the watermark 102 and uses the watermark related information.

The capture image 110 may include a print capture image 110a, a photo capture image 110b, and an image capture image 110c. Meanwhile, the captured image 110 may include characters, numbers, and other text besides a pattern or a shape.

The watermark service server 120 includes an image capture unit 122 for acquiring an original image, a feature point detection unit 124 for code insertion for searching a code insertion area (see 112 in FIG. 6) to arrange the annular code in the original image, A watermark generating unit 126 for generating an annular code using an algorithm, a watermark information unit 128 for storing annular code information, and a capture image generating unit 126 for inserting an annular code into the code inserting region 112, A watermark embedding unit 130 for generating a watermark image 110, and a captured image output unit 132 for transmitting the captured image 110 in an image form or copying the captured image 110 in a printed form.

The image capture unit 122 may process the original image of the photo or process the original image of the image. In the case of printed matter, it is possible to process the original image taken with a scanner or a camera.

The feature point detecting section 124 for code insertion searches the original image for the position where the annular code is disposed. The minutiae point extraction method will be described later.

The watermark generating unit 126 may generate the annulus code using the encoding algorithm of the annulus code. The circular code generation method will be described later.

The watermark information unit 128 stores the annular code related information generated by the watermark generation unit 126 in the database DB and can provide the annular code related information when the information provision request is received from the user.

The watermark embedding unit 130 synthesizes an annular code in the code embedding area 112. [ For example, the image of the original image and the image of the annular code can be inserted by overlapping synthesis. Whereby the original image is processed with the captured image 110 containing the annular code.

The captured image output unit 132 may output the captured image 110 in various forms. And can be transmitted online in the form of a photo or image data through a sending unit 132a by wire or wireless. Or can be copied offline through the printing unit 132b.

The user terminal 150 includes an image obtaining unit 152 for obtaining a captured image 110 using a camera or a scanner, a feature point detecting unit 154 for code extraction for tracking a code inserting region 112 from the captured image 110 A watermark extracting unit 156 for extracting only an annular code from the code inserting region 112, a watermark extracting unit 156 for receiving related information corresponding to the extracted annular code from the watermark service server 120, An analysis unit 158 and a communication unit 160 in which the user terminal 150 communicates with the watermark service server 120 through network communication to receive annular code information.

The user terminal 150 may include a mobile terminal such as a smart phone, a mobile phone, an iPhone, and a notebook computer. For example, a scanner or a camera module, and various communication functions such as communication via a network and short-range wireless communication.

The image acquiring unit 152 may include a sensor interface that can recognize a watermark recognized through the image sensor and the image sensor.

On the other hand, when the watermark 102 is detected on the online network, a watermark 102 is extracted from the downloaded captured image 110 without using a separate camera, And transmits the watermark information to the watermark service server 120 so that the watermark 102 can be compared and recognized.

In the present invention, the characteristic point detecting section 154 for code extraction, the watermark extracting section 156, and the watermark analyzing section 158 can be realized by a separate code analysis application (APP).

The communication unit 160 may include both communication means for performing wired or wireless Internet communication.

Fig. 2 is a plan view showing various embodiments of the annular cord according to the present invention.

Referring to (a) of Fig. 2, the annular code is composed of a plurality of ring bits (r1, r2, r3, ..., rx) arranged in a radial direction in a concentric circle at regular intervals. Basically, each ring bit is designed with a binary code of "0" and "1". If the multiple ring bits are designed as x, the maximum range of the annular code information is x squared of 2.

2, the annular code is further comprised of a plurality of arc bits (a1, a2, a3, ..., ay) arranged in a clockwise (or counterclockwise) . When each ring bit is divided into two equal parts by a plurality of arc bits, the range of the annular code information is expressed by a maximum of 2 xy squared.

Referring to FIG. 2, the annular code may be further configured with a plurality of pattern bits p1, p2, p3, ..., pz by designing each plurality of arc bits in various patterns. When a specific pattern is designed for each arc bit, the maximum expression range of the annular code information is 2 xyz squared. For example, patterns of various shapes can be repeatedly arranged on a bit ring base or a bit arc base in a pattern of a predetermined shape (such as a spade, a heart, a diamond, or a crowbar).

Hereinafter, an annular code type watermark service method according to the present invention will be described with reference to FIG.

Generating an annular code ( S100 )

And generates an annular code type watermark 102 using a predetermined algorithm.

By inserting an annular code capture  Forming an image S200 )

And inserts the watermark 102 using the watermark service server 120.

capture  Extracting an annular code from the image ( S300 )

And extracts the watermark 102 using the user terminal 150.

The step of interpreting and using the annular code related information using the annular code ( S400 )

The watermark 102 is used to utilize the code related information.

Hereinafter, a method for generating an annular code according to the present invention will be described with reference to FIG.

Forming a plurality of ring bits ( S110 )

Referring again to FIG. 2, watermark information of x squared magnitude up to 2 can be generated by distributing x ring symbols in a radial direction by a plurality of ring bits having a constant width in a concentric circle.

Forming a plurality of arc bits ( S120 )

By distributing a plurality of arc bits having a center angle in a plurality of ring bits in the clockwise y direction, it is possible to further generate watermark information of a maximum of two y-squared magnitudes.

Forming a plurality of pattern bits ( S130 )

By adding a specific pattern bit to the background of a plurality of arc bits, it is possible to further generate watermark information having a maximum z-squared magnitude.

Hereinafter, a method of detecting a feature point for code insertion in order to generate a code insertion region according to the present invention will be described with reference to FIGS. 5 and 6. FIG.

Detecting a feature point for code insertion ( S210 )

Referring to FIG. 5 and FIG. 6 (a), various algorithms can be used for the feature point detection in the present invention. For example, Scale-Invariant Feature Transform (SIFT), Speeded Up Robust Features (SURF), and Oriented BRIEF (ORB). When designing the watermark 102 as an annular code, the SIFT algorithm, which is most optimized for annular code detection, can be used. Since SIFT is particularly advantageous for rotation and size change, it is understood to be the most effective feature extraction algorithm for location tracking using annular code.

Aligning the feature points in order of high intensity ( S220 )

Referring to FIG. 5 and FIG. 6 (b), the detected feature points are arranged in the order of high intensity to low intensity.

Removing low intensity feature points ( S230 )

Referring to FIGS. 5 and 6, if two or more feature points overlap, some low-intensity feature points are removed. That is, if two or more feature points are overlapped, the feature points having small intensities are excluded from the code insertion region 112.

Inserting an annular code ( S240 )

Referring to Figs. 5 and 6, a feature point having a high strength is specified as the code embedding area 112, and an annular code is inserted therein.

For example, in the drawing, five feature points are detected, and a unique number is determined from five to five for the feature points. When the feature points of the second and fourth feature points having weak strength among the mutually overlapping feature points are removed, 3, and 5, respectively. The feature points 1, 3, and 5 become the code insertion region 112, into which the annular code is inserted.

Hereinafter, a method of detecting a feature point for code extraction in order to find an annular code in a code embedding area will be described with reference to FIGS. 7 and 8. FIG.

Detecting a feature point for code extraction ( S310 )

Referring to FIG. 7 and FIG. 8 (a), all the minutiae points for code extraction in the code insertion region 112 into which the annular code is inserted are detected to track the annular code.

Detecting an annular code ( S320 )

Referring to Figs. 7 and 8 (b), an annular code inserted in the code insertion area is detected.

Determining the presence of an annular code ( S330 )

7 and 8, it is assumed that an annular code having a certain ratio or more of the annular codes corresponds to a high-intensity feature point and is regarded as a true annular code, and an annular code having a certain ratio or less corresponds to a low- .

For example, it is used only for a certain ratio of annular codes, and ignores annular codes that do not exceed a certain ratio. As described above, all of the strong feature points are removed in the code inserting region 112 with respect to the portion overlapping with the strong feature points, but a similar annular code can also be formed in the removed code inserting region 112, This is because any code can be detected.

Extracting an annular code ( S340 )

Referring to FIGS. 7 and 8, an annular code is extracted from the captured image.

For example, typically all five feature points will be detected, and annular code is inserted only in some of the five feature points, i.e., three (1, 3, and 5) code insertion regions 112, Likewise, a pseudo-circular code can be generated in the code insertion region 112 as well. A quasi-annular code that only extracts the real recursive code that occupies the largest proportion (e.g., 3/5) and occupies the remaining small percentage (e.g., 1/5) is excluded from the code extraction.

Hereinafter, referring to FIG. 9, a method for interpreting relevant information from an annulus code and utilizing the same will be described.

For example, when link information such as a URL address or an IP address corresponding to annular code information is registered in the user terminal 150 or the code interpretation APP itself, it can be directly connected to the URL address or the IP address. Or more code related information through network communication with the watermark service server 120. [

Alternatively, keyword search may be performed on the item center of the annular code information to output the search result. Accordingly, the user can easily access the supplementary advertisement information by clicking the search result without inputting a separate search keyword.

As described above, according to the present invention, a configuration for encoding related information using a watermark-based invisible ring type or an arc type image code is regarded as a technical concept. Many other modifications will be possible to those skilled in the art, within the scope of the basic technical idea of the present invention.

100: watermark service server 102: watermark
110: captured image 120: watermark service server
122: image capturing unit 124: feature point detecting unit for code insertion
126: watermark generating unit 128: watermark information unit
130: watermark inserting unit 132: captured image output unit
132a: Feeder 132b:
150: user terminal 152: image obtaining unit
154: Code extracting feature point detecting unit 156: Watermark extracting unit
158: watermark commentary part 160: communication part

Claims (10)

A captured image including an annular code;
A watermark service server for generating and inserting the annular code to provide the output of the captured image, and for servicing the annular code information; And
And a user terminal for extracting and analyzing the annular code and using the annular code information,
Wherein the captured image comprises one of a printed matter type capture image, a photo type capture image, and an image type captured image in which the annular code is synthesized with the original image. The method according to claim 1,
The watermark service server,
An image capturing unit for acquiring the original image;
A code insertion feature point detector for searching a code insertion area for arranging the circular code in the original image;
A watermark generating unit for generating the annular code;
A watermark information section for storing the annular code information;
A watermark inserter for inserting the annular code into the code inserting area to generate the captured image; And
And a captured image output unit for transmitting the captured image in the form of a photo or image or copying the captured image in the form of a printed material. 3. The method of claim 2,
The user terminal comprises:
An image obtaining unit obtaining the captured image using an image sensor;
A feature point detection unit for extracting a code for tracking the code insertion area from the captured image;
A watermark extracting unit for extracting the annular code in the code inserting area;
A watermark analyzing unit for receiving related information corresponding to the annular code from the watermark service server and recognizing the annular code information; And
And a communication unit for performing network communication with the watermark service server to receive the annular code information. The method according to claim 1,
Wherein the annular code comprises a plurality of ring bits arranged in a radial direction in a concentric circle at regular intervals, and when the ring bit is divided by x, the maximum range of the annular code information is x squared of 2 Wherein the watermark information is a watermarked watermark. 5. The method of claim 4,
Wherein the annular code comprises a plurality of arc bits arranged clockwise in the ring bit with a certain central angle, and when the arc bit is divided by y, the maximum representation range of the annular code information is xy squared Of the annular code type watermark service system. 6. The method of claim 5,
Wherein the annular code includes a plurality of pattern bits in which a specific pattern is repeated on the basis of the arc bit, and when the pattern bit is divided into z, the maximum range of the annular code information is a square of xyz of 2 Wherein the watermark information is a watermarked watermark. Generating an annular code;
Inserting the annular code to form a captured image;
Extracting the annular code from the captured image; And
And interpreting and utilizing related information using the annular code. ≪ RTI ID = 0.0 > 18. < / RTI > 8. The method of claim 7,
Wherein generating the annular code comprises:
Wherein the concentric circles are equally binary encoded with a plurality of ring bits of the same width in the radial direction and are binary-coded by equally dividing the same into a plurality of arc bits having the same central angle in the clockwise direction. 9. The method of claim 8,
Wherein the step of inserting the annular code to form a captured image comprises:
Detecting a feature point for code insertion using an optimal SIFT algorithm for extracting the annular code to generate a code insertion region into which the annular code is inserted;
Aligning the feature points in order from high-strength feature points having high strength to low-strength feature points having low strength;
If the two or more feature points overlap, removing the low-intensity feature points; And
And inserting the annular code into the code insertion region of the high intensity feature point. 10. The method of claim 9,
Wherein extracting the annular code from the captured image comprises:
Detecting a feature point for code extraction of the code insertion region into which the annular code is inserted to track the annular code;
Detecting the annular code of the code insertion area;
Wherein the annular code corresponding to the high intensity feature point is regarded as a true annular code and the annular code less than the predetermined ratio corresponds to the low intensity feature point and is regarded as a similar annular code, Determining the presence of the < / RTI > And
And extracting the true annulus code. ≪ Desc / Clms Page number 20 >
KR1020150121218A 2015-08-27 2015-08-27 System and method for providing service of watermarking-based invisible ring-type image code KR101724892B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070073332A (en) * 2006-01-04 2007-07-10 한국과학기술원 Robust image watermarking using scale invariant feature transform
KR20090126333A (en) * 2008-06-02 2009-12-09 주식회사 마크애니 Method for quality control of digital contents using data hiding techniques and system therof
KR100936124B1 (en) * 2008-01-16 2010-01-12 주식회사 마크애니 A method and apparatus for realtime-providing multimedia contents comprising watermark
KR20100056044A (en) * 2008-11-19 2010-05-27 주식회사 마크애니 Method for the contents filtering using watermark at user device and system therof
KR20130132511A (en) 2010-12-23 2013-12-04 노벨리스 인코퍼레이티드 Reverse flow regenerative apparatus and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070073332A (en) * 2006-01-04 2007-07-10 한국과학기술원 Robust image watermarking using scale invariant feature transform
KR100936124B1 (en) * 2008-01-16 2010-01-12 주식회사 마크애니 A method and apparatus for realtime-providing multimedia contents comprising watermark
KR20090126333A (en) * 2008-06-02 2009-12-09 주식회사 마크애니 Method for quality control of digital contents using data hiding techniques and system therof
KR20100056044A (en) * 2008-11-19 2010-05-27 주식회사 마크애니 Method for the contents filtering using watermark at user device and system therof
KR20130132511A (en) 2010-12-23 2013-12-04 노벨리스 인코퍼레이티드 Reverse flow regenerative apparatus and method

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