複合式多波長驗鈔裝置探討

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题名:	複合式多波長驗鈔裝置探討
作者:	謝炎忠;Hsieh,Yen-Chung
贡献者:	機械工程學系在職專班
关键词:	UV-LED;紅外線;圖像辨識
日期:	2016-08-30
上传时间:	2016-10-13 14:52:17 (UTC+8)
出版者:	國立中央大學
摘要:	摘要從古至今貨物的流通都是以貴金屬或是用等值的物質來代表目前的紙鈔，但紙鈔的紙值成本很低,但印刷之後的價值就有所不同了，所以利用高科技的印刷仿造時，可得到想當高的利益，所以無人去仿照貴金屬，但紙鈔是可以被仿照的。目前世界各國所用使用的紙鈔，從紙張材質、油墨顏料及其製鈔技術都是機密，由政府機關嚴格控管，一般人是無法取得的。所以坊間的偽鈔只能使用替代原料來模仿真鈔的特徵，例如顏色及觸感。故本研究基於不同物質其光學特性一定有差異的依據，結合了「接觸式影像感測器」具高解析度的優點，發展出一套可適用於紙鈔辨識的裝置。本文實驗是將市面的「接觸式影像感測器」，改裝成複合式多波長驗鈔裝置，包含了紅(Red)、綠(Green)、藍(Blue)、紅外線(IR)及紫外線(UV)等五種LED光源，進行紙鈔的掃描辨識。紙鈔在製造時會採用各種特殊的設計，如水印、光影變化箔膜、變色安全線、不同顏色螢光纖維絲等，在不同的光源下掃描，其吸收反射會隨著波長而變化，甚至有螢光反應，掃描而成的影像可顯現出特徵及差異，進而比對辨識。複合式多波長驗鈔裝置使用不同波長光源掃描成像並顯示其光學特徵，可望發展出攜帶型掃描器在辨識方面的應用，如紙鈔、證件、有價證劵上的掃描辨識。 ;Abstract In this thesis, in ancient times the circulation of goods are equivalent substance or with a noble metal to represent the current bill. The paper value of banknotes of low cost, after printing, but the value is somewhat different. Therefore, when using high-tech printed copy, people can obtain high interest. So no one to imitate precious metals, but the bill can be modeled. Banknotes currently used around the world, the material from the paper, ink and paint system technology are confidential notes, strictly controlled by the government, most people are unable to obtain. So the printing of counterfeit money can only use alternative raw materials to imitate the banknote features such as color and texture. Therefore, this study must be based on differences in the optical properties of different substances on the basis of. It combines the "contact image sensor" has the advantages of high resolution, and can be applied to develop a bill identification device This article is to test the ground "contact image sensor", converted into a composite multi-wavelength money detector device, contains red (Red), green (Green), and blue (Blue), infrared (IR) and ultraviolet (UV) in five different LED light source to scan to identify banknotes. In the manufacture of banknotes will be using a variety of special design, such as watermarks, change light foil, security thread color, different color firefly fiber yarn etc. At different scan sources, the absorption wavelength varies with reflections, even fluorescence response, images can be scanned from the show characteristics and differences, and then compare Identification. Composite multi-wavelength light money detector device uses a different wavelength scan imaging and display its optical characteristics, and applications are expected to develop a portable scanner in terms of identification, such as banknotes, documents, scanning identification valuable securities.
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