- 學位論文
紅外線圖像化二維條碼與安全文件螢光纖維絲定位之防偽功能整合應用
Integration of Graphic QR Code with Both Infrared Watermark and Fluorescent-fiber Position to Enhance Anti-counterfeiting Function
摘要
安全文件的偽造和仿冒每年在全球造成上百億美元的損失。因此防偽科技對於科技日新月異的現今來說，是非常重要的研究。而在物聯網時代，一物一碼已是萬物互聯的基礎。在過去利用安全文件紙張相關防偽特徵作定位之研究，僅限於特定人士才能對其隱藏的條碼作驗證，且傳統QR code(Quick Response Code)在外觀上缺乏美觀性，與文件版面結合時顯得突兀，其附加價值與美觀性略顯不足。 因此本研究將安全文件中常見在造紙過程時隨機散落在紙漿的「螢光纖維絲」之獨特分布位置數據化。並將其分布位置資訊於UV光源下定位擷取並以實驗法從分割量4x4、5x5及6x6 bytes變項中找出最適當的分割資訊量來擷取螢光纖維絲的分布位置資訊進行編碼。再以現今使用最普遍的二維條碼QR code印製於該文件上，使其具有一物一碼的防偽功能。並結合印刷四色中，青(Cyan)、洋紅(Magenta)、黃(Yellow)在紅外光源下，均會被穿透而呈透明狀，而黑色(Black)色料中的碳黑在紅外光底下會吸收紅外光，可在紅外線照射下反射出影像之原理，製作紅外線圖像化QR code。亦即在一圖像中同時具有外顯簡單資訊並美化之圖像化QR code(C、M和Y墨)以及隱藏之紅外線QR code(K墨)。最後驗證其生成之紅外線圖像化QR code，發現5x5 bytes為擷取及定位螢光纖維絲位置時的最佳資訊分割量。本研究製作之外顯的圖像化QR code提升了二維條碼的美觀性，同時隱藏之紅外線QR code記錄該文件之獨特的螢光纖維絲位置資訊。和文件本身特色連結之一物一碼的隱藏資訊在經過複印之後便無法正確讀取。實驗成果顯示本研究之應用已具有防偽的可行性。
並列摘要
Forgery and counterfeiting of security documents cause billions of dollars in losses each year worldwide. Therefore, the advance of security technology is very important to keep up with the rapid development of both science and technology. Nowadays, unique identification has already become the basics of internet of everything, and some researchers used the anti-counterfeiting feature positioning on security document to verify the hidden bar code. Traditional QR code (Quick Response Code) is lack of aesthetic, and it cannot fit quite well with the overall layout design. Therefore, this research is going to quantify the unique location distribution of "fluorescent-fibers" which randomly scattered on the substrate during the security papermaking process. The experimental method is applied to find the most appropriate segmentation parameters (4x4, 5x5, and 6x6 bytes) by capturing the distribution position of the fluorescent-fibers under UV light detection and by encoding the distribution of those fluorescent-fibers into a hidden QR code. Then, the hidden QR code printed on the security documents make it possess the anti-counterfeiting function of unique identification. Since the printing color inks of cyan (C), magenta (M) and yellow (Y) are almost transparent under infrared detection, the carbon in black (K) ink absorbs infrared light. Therefore, we can design the infrared graphic QR code by using the characteristics of inks reflection under infrared illumination. The infrared graphic QR code include both of explicit information (in C, M and Y inks) and hidden infrared QR code (in K ink). It ensures the infrared QR code can be verified. The graphic QR code developed in this research enhances the aesthetics of the 2D barcode, and additionally the hidden infrared QR code records the unique fluorescent-fiber position information of the security document. The hidden information of unique identification cannot be read correctly after copying. The experimental results show that the application of this proposed method has great potential in of anti-counterfeiting applications.
參考文獻
延伸閱讀
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