Image sensor distinguishable from counterfeit bill and method thereof

Abstract

An image sensor for detecting a counterfeit bill includes an ultraviolet ray emitting section for emitting ultraviolet rays to a bill to be checked; an image sensor section for acquiring a first image as an image obtained by photographing the bill to be checked in a state in which ultraviolet rays are not emitted by turning off the ultraviolet ray emitting section, and a second image as an image obtained by photographing the bill to be checked in a state in which ultraviolet rays are emitted by turning on the ultraviolet ray emitting section; a storing section for storing the first image and the second image; and a counterfeit bill detecting section for extracting a fluorescent image by removing the first image from the second image stored in the storing section and determining whether the bill to be checked is a counterfeit bill or an original bill.

Description

technical field [0001] The present invention relates to an image sensor and method for detecting counterfeit bills, and more particularly, to such an image sensor and method for detecting counterfeit bills capable of detecting counterfeit bills in a short time so that a user can be exposed to ultraviolet rays With the shortest time, counterfeit coins can be easily detected even in bright environments. Background technique [0002] Recently, with the development of color copier and scanner technology, these color copiers and scanners are widely distributed all over the world, making it easier to create counterfeit money. In fact, the apparent increase in the frequency of counterfeiting incidents and the distribution of counterfeit coins has caused serious social problems. [0003] Typically, cash or securities are paid for the price of products and services. To confirm whether cash or securities are counterfeit or genuine, the guidelines are to check with a banking institut...

AI Technical Summary

Problems solved by technology

[0009] However, since counterfeit currency detection using conventional counterfeit currency detectors is entirely visually judged by the user's naked eyes, it may lead to different results in counterfeit currency detection depending on user experience

[0010] Furthermore, in the case of a conventional counterfeit detector using ultraviolet rays, errors may occur in counterfeit detection even depending on the illuminance of the surrounding environment

In addition, due to the long-term exposure of the user's eyes to ultraviolet rays that are harmful to the human body during the counterfeit currency detection task, the user's vision may be impaired

Also, if the user uses the counterfeit detector for a long time, it increases the possibility of fire and causes additional power consumption due to overheating

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