Multi-light-source iris image acquisition device capable of eliminating light and shadow in imaging area

Abstract

The invention provides a multi-source iris image acquisition device capable of eliminating light and shadow in an imaging area. The multi-source iris image acquisition device comprises a guide lens, alight source plate and an iris image acquisition camera module, wherein the guide lens is an assembly which is prepared by taking an optical plate as a substrate in an ink printing manner and has a partial shading function; the light source plate provides symmetrical light sources and lens mounting holes; and the iris image acquisition camera module is provided with two cameras for collecting iris images of the left and right eyes respectively. According to the multi-source iris image acquisition device, the problem of inaccurate iris image acquisition caused by shadows and oval light spots in the iris image acquisition process is effectively solved under the conditions that an external heavy structure is not increased and the overall size and total power consumption of equipment are notincreased.

Description

technical field [0001] The present invention relates to the field of novel biometric identification technology, in particular to a multi-source iris image acquisition device capable of eliminating light and shadow in an imaging area. Background technique [0002] At present (single) dual-camera iris image acquisition equipment, in order to enhance the texture of the iris and improve the quality of iris image acquisition, an external infrared light source with a wavelength of 800-1000nm is often required. And in order to meet the requirements of different collection distances, the number of infrared light sources should be at least two or more, but this design has led to new problems: [0003] (1) The light radiated by multiple light sources produces multiple strong light reflections on the face of the collector, especially the reflected light formed by the reflection in the high nose bridge area of ​​the face can directly enter the iris area to produce reflected light spots,...

AI Technical Summary

Problems solved by technology

[0009] In order to effectively solve the problem that the multi-light source iris image acquisition device in the prior art forms light shadows and elliptical spots in the imaging area, the purpose of the present invention is to provide a multi-source iris image acquisition device that can eliminate light and shadow in the imaging area

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