| dc.description.abstract | 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. | en_US |