201137757 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種二維條碼， 锸目士晚# ’尤其涉及一種具有隱藏碼的 QR碼及其隱藏碼的形成與識別方法。 【先前技術】 二維條碼作為—種新的信息存儲和傳遞技術，廣泛應用於 =品，識、安全防偽和電子商務Μ多領域。二維條碼利用某 特疋的幾何圖形按-定規律在二維方向上分佈的黑白相間 的圖形3己錄資料符號信息的；在代碼編製上巧妙地利用構成電 _«輯基礎的位元流的㈣，使用奸個與二進 位相對應的幾何形體來表示文字數值資訊，通過圖像輸入設備 或光電掃描設備自域讀以實現資訊自動處理。 常見的國際標準二維條碼有咖417、Data Matrix、Maxi Code及QR Code等各種標準，其中以qr碼（r201137757 VI. Description of the Invention: [Technical Field] The present invention relates to a two-dimensional barcode, and in particular to a method for forming and identifying a QR code having a hidden code and a hidden code thereof. [Prior Art] As a new information storage and transmission technology, 2D barcode is widely used in many fields such as product, identification, security and anti-counterfeiting. The two-dimensional bar code uses the geometry of a particular feature to record the symbol information of the black and white image in the two-dimensional direction according to the regular rule; the code stream of the basic structure is constructed skillfully in the code preparation. (4), using the geometric shape corresponding to the binary to represent the literal numerical information, and self-domain reading through the image input device or the photoelectric scanning device to realize automatic information processing. Common international standard 2D barcodes include various standards such as Coffee 417, Data Matrix, Maxi Code and QR Code, among which qr code (r
Code ’ QR Code)應用最為廣泛，如第一圖所示，現有的颂 碼H)，呈正方形並由若干單元資訊色塊組成，其單元資訊色塊 為黑色方塊1ΓΜ色錢12，，黑色方塊u，代表：進位數字 值的〇’白色方塊12’代表卜通過二進位碼將資訊編成沙碼。 QR碼具有超高速、全方位（鳩度）識讀的特點，能有效地 表示漢字，在諸多行業得到了廣泛的應用。 然而，隨著QR石馬技術的成熟、應用領域的推廣，其編碼 及解碼方式為公眾所知，在涉及安全㈣Μ要絲的領域， 通书要求QR碼攜帶另外的代表防偽或加密資訊的隱藏碼，而 當前並沒有具體的解決方案，因此，急需_種具有隱藏碼的 QR碼肖QR碼的隱藏碼的形成方法及該QR碼的隱藏碼的 識別方法。 201137757 【發明内容】 本發明的-個目的是提供 隱藏碼在QR碼令不易 ，、有隱减碼的QR碼，所述 本發明的另一個广’隱藏功忐。 隱=在㈣中不易發現且具有較戶斤述 不影響原有的QR碼的解讀方式，並能將方法’该方： 的隱藏碼快速準確地識别出來。 π麵述Q R瑪中 々2述目的’本發明所提供的具有隱藏碼的QR碼， 1，：二：干單元資訊色塊按照一定規律無間隙地排列形 = 置於單元資訊色塊中，設置於單元資訊色塊 中的隱藏碼與該單元資訊色塊具有不同的色度。 為達成上述目的’本發明所提供的隱藏碼的形成方法，包 糾τ㈣：首先’提供一張QR碼’該QR碼由若干呈正方 形的供電腦識別的單元資訊色塊按照一定規律無間隙地排列 形成，其次，在單元資訊色塊中設置與該單元資訊色塊具有不 同的色度的供電腦識別的小資訊色塊’該小資訊色塊形成隱藏 碼0 為達成上述目的’本發明所提供的隱藏碼的識別方法，包 括如下步驟：首先，切換攝像機的解析度，針對每一 QR碼的 〇口一 -Aj 早几貢訊色塊選取同一分析區域，分別用高解析度及低解析度 獲取所述區域内的圖像資訊；再來，分別分析統計每一單元資 訊色塊上所獲取的圖像資訊的圖元的平均值；最後’設定門檻 值來識別所述隱藏碼，平均值低於所述門檻值判為〇’大於所 述門檻值判為1。 如上所述’本發明的具有隱藏碼的QR碼’所述隱藏碼設 201137757 的::原有的QR碼的解讀方式，通過利用小 QR碼的單-乙广、Λ色塊具有不同色度的隱藏碼設置在 藏ΐ的防偽和隱藏功能，應地，本發明的隱 j碼㈣成方法’通過利用小量的與QR碼的單元資 =不:色度的隱藏碼設置在砂碼的單元資訊色塊中來達到障 滅防偽的目的’易於實現且不影響原有的QR碼的解讀方式: 並具有較尚防偽和隱藏功能。本發明的隱藏碼的識別方法，在 =影響原有的QR碼的解讀方式的基礎上，利用攝像機具有的 冋低解析度’配合設定合適的門檻值，實現快速準確地識別所 述QR碼中的隱藏碼。 【實施方式】 為詳細說明本發明之技術内容、構造特徵、所達成的目的 及功效，以下茲例舉實施例並配合圖式詳予說明。 請參閱第二圖與第三圖，本發明實施例中的砂碼ι〇呈 =方形並由若干同樣呈正方形的白色方塊12與黑色方塊11的 單元塊按照一定規律無間隙地排列形成，每一白色方塊12或 黑色方塊11形成QR碼10的單元資訊色塊，黑色方塊丨丨與 白色方塊12分別代表二進位數字值的〇和i，通過二進位碼 將資訊編成QR碼1〇，通過圖像識別可解碼獲得相關資訊。 參閱第四圖’本發明隱藏碼的形成方法，包括如下步驟： S001:提供一張QR碼，所述QR碼由若干呈正方形的供電 腦識別的單元資訊色塊按照一定規律無間隙地排列形成； S002:在所述單元資訊色塊中設置與該單元資訊色塊具有 不同的色度的供電腦識別的小資訊色塊，所述小資訊色塊形成 隱藏碼。 201137757 請續參閱第三圖，具體地，所述隱藏碼20呈正方形並位 於所設置在的QR石馬1〇的單元資訊色塊的中心且該隱藏碼 2〇的大小為（^尺碼1〇的單元資訊色塊的大小的九分之一，根 據需要在適當的單元資訊色塊中設置最小圖it的隱藏碼20, 具體地，隱藏碼20可為小黑色方塊或小白色方塊，對應插入 於QR碼10的單元資訊色塊中，由於色度的不同形成高對比 度。在QR碼10插入隱藏碼20後表現為插入了高對比度的黑 白塊。本發明的隱藏碼2〇以與所插入的單元資訊色塊形成高 對比的小黑塊或小白塊的方式插入於QR碼丨〇中而不影響原 有的QR碼ίο的解讀方式，結構簡單且易於實現，在肉眼觀 察下不易被發現，而其需利用高解析度及低解析度分析並配合 a又疋的門檻值才能解讀進行識別，具有較高防偽和隱藏性能。 請參閱第五圖，本發明所提供的隱藏碼的識別方法，包括 如下步驟： S101:切換攝像機的解析度，針對每一 QR碼的單元資訊 色塊選取同一分析區域，分別用高解析度及低解析度獲取所述 區域内的圖像資訊； s 1 〇 2:分別分析統計每一單元資訊色塊上所獲取的圖像資 訊的圖元的平均值； S103.没定門檻值來識別所述隱藏碼，平均值低於所述門 檻值判為〇，大於所述門檻值判為1。 其中，所選取的攝像機具有可切換高/低解析度影像模 組，進行識別分析時，低解析度分析各單元資訊色塊時若對中 心點nxn陣列的圖元點進行分析，高解析度則以相同的ηχη 陣列分析平均值，其中通過攝像機的校正功能選取設定合適的 門檻值，例如，設定門檻值為25，則圖塊的圖元的色度平均 201137757 值大於或等於25的視為1，小於25為〇。 參閱第六圖至第八圖，圖中的Count參數表示所計算的圖 元點數；Min參數表示所計算的圖元點中的最小色度值；Μ3χ 參數表示所計算的圖元點中的最大色度值；Mean參數表示平 均值；StdDev參數表示統計標準方差值；Mode參數表示眾數， 即出現最多次數的值，0—256分別表示白色漸變到黑色對應的 色度值，0為最黑，256為最白。對第二圖中a部分區域以中 心點處7x7陣列在2M(1600xl200)的高解析度模式下進行的仿 真分析，得出該選取區域的圖元如第六圖所示的色度直方圖的 仿真圖，共計算圖元點49點，其中圖元的最小值為0，最大 值為196，平均值為35，標準方差為53，出現最多次數的值 為〇，共16次，由於其平均值為35，而35>=25，則該分析的 區域的圖塊視為1 ; 同樣的’對第二圖中A部分區域以14xl4陣列在 2M(1600xl200)的高解析度模式下進行分析，得出如第七圖所 不的色度直方圖，其平均值為21，而21<25，視為〇;對第二 圖中A部分區域以7x7陣列在VGA(64〇x48〇)的低解析度模式 下的進行仿真分析，得出如第八圖所示的色度直方圖，其平均 值為14，而14<25，視為因此，通過切換高/低解析度可以 區別出不同的碼，達到隱藏碼的功能，通過編碼方式在特定資 料中插入1/9大小的隱藏碼2〇,可通過不同的門檻值來檢驗是 否插入隱藏碼20並獲得隱藏碼2〇的資訊。 如上所述，所述隱藏碼20設置在QR碼1〇中而不影響原 有的QR碼10的解讀方式，通過利用小量的與口尺碼的單 元資訊色塊具有不同色度的隱藏碼2〇設置在（^^碼1〇的單元 貢訊色塊中來達到隱藏防偽的目的，不易於發現且易於實現並 201137757 具有較冋防偽和隱藏功能。相應地，本發明的QR碼的隱藏碼 的形成方法’通過利用小量的與QR ^ 1〇的單元資訊色塊具 有不同色度的隱藏碼20設置在收碼1〇的單元資訊色塊中來 達到隱藏防偽的目的，易於實現且不影響原有的QR碼1〇的 解項方式’並具有較高防偽和隱藏功能。本發明的碼的隱 藏碼20的識別方法，在不影響原有的卩尺碼1〇的解讀方式的 基礎上，利用攝像機具有的高低解析度，配合設定合適的門檀 值，實現快速準確地識別所述⑽碼1〇中的隱藏碼2〇。 【圖式簡單說明】 第一圖係現有的QR碼之平面示意圖。 第一圖係本發明具有隱藏碼的QR碼之平面示意圖。 - 第三圖係隱藏碼設置在QR碼的單元資訊色塊中之結構示 意圖。 第四圖係本發明隱藏碼的形成方法之流程圖。 第五圖係本發明隱藏碼的識別方法之流程圖。Code 'QR Code' is the most widely used. As shown in the first figure, the existing weight H) is square and consists of several unit information color blocks. The unit information color block is black square 1 color money 12, black square u, represents: 进 'white square 12' of the carry digit value represents the information compiled into the sand code by the binary code. The QR code has the characteristics of ultra-high speed and full-scale (reading) reading, which can effectively represent Chinese characters and has been widely used in many industries. However, with the maturity of QR stone technology and the promotion of application fields, the encoding and decoding methods are known to the public. In the field involving security (4) Μ silk, the book requires QR code to carry another hidden anti-counterfeiting or encrypted information. There is no specific solution at present, and therefore, a method for forming a hidden code of a QR code SHA code with a hidden code and a method for identifying a hidden code of the QR code are urgently needed. SUMMARY OF THE INVENTION [0007] It is an object of the present invention to provide a QR code in which a hidden code is difficult in a QR code and has an implicit code, and the present invention has another wide hidden function. Hid = is not easy to find in (4) and has a more accurate interpretation of the original QR code, and can quickly and accurately identify the hidden code of the method. π面面QR玛中々2 The purpose of the present invention is to provide a QR code with a hidden code, 1, 2: dry cell information color block arranged according to a certain rule without gaps = placed in the unit information color block, set The hidden code in the unit information color block has a different chromaticity from the unit information color block. In order to achieve the above object, the method for forming the hidden code provided by the present invention, the packet correction τ (4): firstly, 'provide a QR code', the QR code consists of a plurality of square unit information color blocks for computer recognition according to a certain rule without gaps. Arranging, and secondly, setting a small information color block for computer recognition having a different chromaticity from the unit information color block in the unit information color block. The small information color block forms a hidden code 0 to achieve the above object. The method for identifying the hidden code includes the following steps: first, switching the resolution of the camera, selecting the same analysis area for each QR code of the mouth-Aj early tribute color block, respectively, using high resolution and low resolution Degree information is acquired in the area; and then, the average value of the primitives of the image information acquired on each unit information color block is separately analyzed; finally, the threshold value is set to identify the hidden code, and the average A value below the threshold is judged as 〇' greater than the threshold value is judged as 1. As described above, the 'QR code with hidden code of the present invention' has a hidden code set of 201137757:: an original QR code is interpreted by using a small QR code of a single-Big, a color block having different chromaticities The hidden code is set in the anti-counterfeiting and hiding function of the Tibetan mastiff, and the hidden j code (four) into the method of the invention 'by using a small amount of unit code with the QR code = not: the hidden code of the chroma is set in the sand code The purpose of the unit information color block to achieve the purpose of anti-counterfeiting is easy to implement and does not affect the interpretation of the original QR code: and has more anti-counterfeiting and hiding functions. The identification method of the hidden code of the present invention realizes the fast and accurate recognition of the QR code by using the low resolution of the camera to set an appropriate threshold value based on the method of affecting the interpretation of the original QR code. Hidden code. [Embodiment] In order to explain the technical contents, structural features, objects and effects of the present invention in detail, the embodiments will be described in detail below with reference to the drawings. Referring to the second and third figures, the sand code 〇 in the embodiment of the present invention is squared and formed by a plurality of square blocks 12 and black square blocks which are also square, arranged in a regular manner without gaps. A white square 12 or a black square 11 forms a unit information color block of the QR code 10, and the black square 丨丨 and the white square 12 respectively represent 〇 and i of the binary digit value, and the information is encoded into a QR code by the binary code 1 〇, Image recognition can be decoded to obtain relevant information. Referring to the fourth figure, the method for forming the hidden code of the present invention includes the following steps: S001: providing a QR code, the QR code is formed by a plurality of square unit information color blocks for computer recognition according to a certain regularity without gaps. S002: setting, in the unit information color block, a small information color block for computer recognition that has a different chromaticity from the unit information color block, and the small information color block forms a hidden code. 201137757 Please refer to the third figure. Specifically, the hidden code 20 is square and located at the center of the unit information color block of the QR rock horse set at the same time and the size of the hidden code 2〇 is (^ size 1〇) The unit information is one-ninth of the size of the color patch, and the hidden code 20 of the minimum map is set in the appropriate unit information color block as needed. Specifically, the hidden code 20 may be a small black square or a small white square, correspondingly inserted. In the unit information color block of the QR code 10, a high contrast is formed due to the difference in chromaticity. After the hidden code 20 is inserted into the QR code 10, a black and white block having a high contrast is inserted. The hidden code of the present invention is inserted and inserted. The unit information color block forms a high contrast small black block or small white block inserted in the QR code without affecting the original QR code ίο interpretation mode, the structure is simple and easy to implement, and is not easily seen by the naked eye. It is found that it needs to use high-resolution and low-resolution analysis and the threshold value of a and 疋 can be interpreted to have high anti-counterfeiting and hiding performance. Please refer to the fifth figure for the identification of hidden code provided by the present invention. The method includes the following steps: S101: switching the resolution of the camera, selecting the same analysis area for the unit information color block of each QR code, and acquiring image information in the area by using high resolution and low resolution respectively; s 1 〇2: respectively analyzing and averaging the average values of the primitives of the image information acquired on each unit of the information color block; S103. The threshold value is not determined to identify the hidden code, and the average value is lower than the threshold value. The value of the threshold is greater than 1. The selected camera has a switchable high/low resolution image module, and when the recognition analysis is performed, the low-resolution analysis of each unit of the information color block is performed on the center point nxn array. The element points are analyzed, and the high resolution analyzes the average value by the same ηχη array. The correct threshold value is selected by the camera correction function. For example, if the threshold value is set to 25, the chroma of the picture element is averaged. 201137757 Values greater than or equal to 25 are considered to be 1 and less than 25 are considered as 〇. Referring to Figures 6 to 8, the Count parameter in the figure represents the number of calculated primitive points; the Min parameter represents the calculated The minimum chrominance value in the element; Μ3χ indicates the maximum chrominance value in the calculated feature point; the Mean parameter represents the average value; the StdDev parameter represents the statistical standard variance value; and the Mode parameter represents the mode, ie, the maximum number of occurrences The value of 0-256 represents the chromaticity value corresponding to the white gradient to black, 0 is the blackest, and 256 is the whitest. For the a part of the second figure, the high resolution of the 7x7 array at the center point is 2M (1600xl200). In the simulation analysis carried out in the degree mode, the simulation of the chromaticity histogram shown in the sixth figure is obtained for the primitives of the selected area. A total of 49 points of the primitive point are calculated, wherein the minimum value of the primitive is 0, the maximum value For 196, the average is 35, the standard deviation is 53, and the maximum number of occurrences is 〇, a total of 16 times. Since the average value is 35, and 35>=25, the tile of the analyzed region is regarded as 1; The same 'analysis of the A-part area in the second figure in a high-resolution mode of 2M (1600xl200) in a 14xl4 array yields a chroma histogram as shown in the seventh figure, with an average of 21, and 21<;25, as 〇; for the second part of the A part of the area with 7x7 array in VGA (6 Simulation analysis in low resolution mode of 4〇x48〇) yields a chromaticity histogram as shown in the eighth figure, with an average of 14 and 14 <25, as it is, by switching high/low The resolution can distinguish different codes and achieve the function of hidden code. By inserting a hidden code 21/ of 1/9 size into a specific data by coding, it is possible to check whether the hidden code 20 is inserted and obtain a hidden code by different threshold values. 2 〇 information. As described above, the hidden code 20 is set in the QR code 1〇 without affecting the interpretation manner of the original QR code 10, and the hidden code 2 having different chromaticities by using a small amount of unit information patches of the mouth size code. 〇 Set in the unit comma color block of (^^ code 1〇 to achieve the purpose of hiding anti-counterfeiting, not easy to find and easy to implement and 201137757 has more anti-counterfeiting and hiding functions. Correspondingly, the hidden code of the QR code of the present invention The method for forming 'is achieved by hiding the anti-counterfeiting by using a small amount of hidden code 20 having a different chroma of the unit information patch of QR ^ 1〇 to achieve the purpose of hiding the anti-counterfeiting, which is easy to implement and not It affects the original QR code 1〇 solution method and has higher anti-counterfeiting and hiding functions. The identification method of the hidden code 20 of the code of the present invention is based on the interpretation method of the original 卩 size code 1〇. Using the high and low resolution of the camera, and setting the appropriate threshold value, the hidden code 2〇 in the (10) code 1〇 can be quickly and accurately identified. [Simple description of the figure] The first picture is the existing QR code. Schematic plan view. The first figure is a schematic diagram of a QR code with a hidden code of the present invention. - The third figure is a schematic diagram of a hidden code set in a unit information color block of a QR code. The fourth figure is a flow of a method for forming a hidden code of the present invention. Fig. 5 is a flow chart of a method for identifying a hidden code of the present invention.
第六圖係為對第二圖所示A部分區域以7x7陣列在 2M(1600xl200)的高解析度模式下之仿真圖。 第七圖係對第二圖所示A部分區域以14χ 14陣列在 2M(1600xl200)的高解析度模式下之仿真圖。 第八圖係對第二圖所示A部分區域以7χ7陣列在 VGA(640><480)的高解析度模式下之仿真圖。 【主要元件符號說明】 10 黑色方塊 11 12 隱藏碼 20 QR碼 白色方塊The sixth figure is a simulation diagram of the A-part area shown in the second figure in a high resolution mode of 7M7 array at 2M (1600xl200). The seventh figure is a simulation diagram of the A portion of the area shown in the second figure in a high resolution mode of 14 χ 14 array at 2M (1600 x 120). The eighth figure is a simulation diagram of the A-area region shown in the second figure in a high resolution mode of 7 χ 7 array in VGA (640 >< 480). [Main component symbol description] 10 black squares 11 12 hidden code 20 QR code white square