Device for acquiring paper currency face feature images at high speed

Abstract

The invention relates to a device for acquiring paper currency face feature images at a high speed, which comprises a shell, an image processing unit, cameras, upper dustproof glass, lower dustproof glass, a transmission light source and a currency passage. The device is characterized in that: the cameras are placed transversely on single side, and the transmission light source is arranged relative to one side of the cameras. Aiming at various paper currencies and irrespective of face and orientation, when the paper currencies sequentially pass through the currency passage at a high speed, the transmission light provided by the high-brightness light emitting diode (LED) array type light source overlaps the feature images of front and back of the paper currencies, and face feature images are acquired by shooting of the cameras, so that the paper currency face feature images can be acquired at one time at the high speed, and the operating efficiency is greatly improved; the device has compact structure, is simple and convenient to install and maintain, and can be conveniently applied to the conventional financial machine tools such as currency detectors, automatic teller machines (ATM), cash deposit machines (CDM) and the like; the configuration and the distribution of the cameras are adaptive to face feature image acquisition of various paper currencies; and compared with other image acquisition modes, the device has low cost and is convenient for popularization and use.

Description

technical field [0001] The invention relates to an image collection device, in particular to a device for collecting banknote face feature images at high speed. Background technique [0002] There are mainly two schemes for the existing device for collecting banknote face feature images: 1. Using a CIS sensor. The CIS sensor is a contact sensor, and the distance between the banknote and the CIS is ≤2mm; the imaging light source is reflective; the imaging speed is ≤700 pieces. A banknote has two faces. If you want to obtain the characteristic images of the front and back sides at one time, at least two CIS devices must be used, and they must be installed opposite to each other. The problem is that the distance between the banknote and the CIS is ≤2mm during work, making The coin channel is narrow, and the old banknotes are easy to block coins, which affects normal use and requires high maintenance; the image acquisition speed is less than 700, which reduces the image acquisi...

AI Technical Summary

Problems solved by technology

A banknote has two faces. If you want to obtain the characteristic images of the front and back sides at one time, at least two CIS devices must be used, and they must be installed opposite to each other. The problem is that the distance between the banknote and the CIS is ≤2mm during work, making The coin channel is narrow, and the old banknotes are easy to block coins, which affects normal use and requires high maintenance; the image acquisition speed is less than 700, which reduces the image acquisition efficiency. To improve the imaging speed, the technical difficulty and implementation cost will be greatly increased; the current market The cost of CIS devices that can be purchased online is relatively high. It is estimated that the cost of the device will exceed RMB 1,000 if at least two are used; 2. Camera sensors are used

The image acquisition speed of the camera sensor is fast, but at least four feature images of the front and back sides of the banknote must be collected at one time, and they must be installed on both sides of the banknote movement direction, as described in the patent "Application No.: 200820233919.5". In the banknote inlet and the banknote outlet, there is a problem that the above-mentioned structure increases the volume of the banknote counter, and also increases the complexity of the machine assembly, especially the increase in the volume of the banknote counter is not suitable for placing in the narrow bank teller. Small working space, not convenient for counter use

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