COUNTERFEIT CURRENCY DETECTION TECHNIQUE USING IMAGE PROCESSING, POLARIZATION PRINCIPLE AND HOLOGRAPHIC TECHNIQUE

摘要

The battle to prevent counterfeiting has been ongoing since the Roman times. With the development of sophisticated printing techniques, the counterfeit currencies have become on- par with the original currency. One of the existing methods was to use UV detection. It is based on the principle of detection of special kinds of inks that are only visible under UV light and the process involves manual analysis, Here, automation is introduced using NI-IMAQ (National Instruments - Image Acquisition). Another process involves polarization principle that, the Indian (Jufrency is not made of paper, but is a blend of cotton, paper and linen. Moreover the tree bark from which the currency is made is called the Balsam fig, which also contains a large percentage of cellulose. Cott on is the purest form of cellulose and cellulose exhibit polarization. Thus it is safe to say that Cellulose constitutes a considerable composition of the currency which can be analyzed using this principle. The final process is Holographic detection. The holograms are gen erally absent In INDIAN currency. Hologram provide better authentication at very cheap cost, and many countries have adopted it. The device senses the hologram and ensures its authentication. The entire process of detecting counterfeit currency is carried ou t using LabVIEW.