An iris image extracting apparatus based on a liquid lens and a VCM

Abstract

The invention discloses an iris image extracting device based on a liquid lens and a VCM, comprises an image processor and a liquid lens, wherein the liquid lens is arranged at the front end of the fixed-focus lens, the fixed-focus lens is arranged in an intermediate through hole of a VCM motor, and finally, the VCM motor is arranged on the image sensor to form a front part of image acquisition; the driver IC, the ambient light sensor and the distance sensor are sequentially integrated and mounted on the circuit board inside the image processor to form a post-processing unit for image acquisition. A CMOS / CCD image sensor, a liquid lens, a VCM Motor Assist, a Motor Driver IC, an MCU, an Ambient Light Sensor, a Distance sensor, a LightControl light source control unit are integrated to forma closed-loop acquisition device, and a good solution is provided to the current market with an limited distance measurement device, a focus collection method, a manual focus collection method, and the problems that the requirements of the environmental light is relatively high bad caused by the image is not clear, the environmental light is too bright and too dark and other problems.

Description

technical field The invention relates to an iris image extraction device, in particular to an iris image extraction device based on a liquid lens and a VCM. Background technique The iris is externally visible and at the same time an internal tissue. Iris recognition has the lowest error rate among various biometric recognition methods, and can reach an accuracy of one millionth. However, due to its inconvenient use, high price and relatively small size Large subject to more restrictions on use. There are many companies dedicated to iris recognition products in the Chinese market, but at present, most domestic companies are agents of foreign products, and there are only a few manufacturers that can produce iris recognition products by themselves. Their technical characteristics are as follows: 1. Fixed-focus acquisition method with a limit distance measuring device: This method is to let the collector lean against a fixed device in front of the lens, the iris of the eye is ...

AI Technical Summary

Problems solved by technology

In order to overcome the deficiencies in the prior art, the present invention provides an iris image extraction device based on liquid lens and VCM, which can solve the problem that sometimes the iris image collected by the fixed-focus acquisition method with a limit device is not clear enough, which affects the recognition rate, and artificial The focusing method has brought inconvenience to the user, and the collected images are not clear enough

Images