Adjustable photo-optics palm print image acquisition equipment

Abstract

The invention provides an adjustable optical photographing palm print image acquisition device which belongs to the optical photographing acquisition device. The device comprises a sealed box body which is divided into three layers, wherein the upper layer is for placing a palm, the middle layer is for placing a light source, a camera and a position adjusting mechanism of the light source and thecamera, and the lower layer is for placing a power supply, a graphic acquisition card as well as electronic equipments like a light source brightness control regulating circuit, etc. A light source holder positioning plate is arranged between the middle layer and the lower layer, a plurality of light source holders perpendicular to the bottom surface of the box body are fixed on the light source holder positioning plate, each light source is a telescopic tube and is provided with a socket on the top end for assembling the light source. The invention provides a fully closed or half opened photographing environment, the number, position, angle and brightness of the light sources can be regulated independently, and the position of the camera can also be finely regulated, thereby obtaining high quality palm prints meeting various requirements.

Description

technical field [0001] The invention belongs to the optical photography image acquisition technology, in particular to a palmprint image acquisition device based on optical photography. Background technique [0002] As an emerging identification technology, biometric identification is one of the most promising high-tech in the world and belongs to the international frontier topic. Palmprint recognition is an important branch of biometric technology. In the palmprint recognition system used for identity verification, the acquisition of palmprint images is an important aspect, which directly affects the difficulty of subsequent processing and the effect of processing results, and then affects the recognition rate, robustness and performance of the system . [0003] So far, there have been some patents on palmprint image acquisition devices and palmprint recognition that have given different ideas. The research on online palmprint image acquisition method (including the desi...

AI Technical Summary

Problems solved by technology

In the existing palmprint collection equipment, there are shortcomings such as inaccurate positioning, unstable structure, few adjustable parts, and small adjustment range.

The main problem is that the number of light sources of the device is fixed and limited to the same plane, and the brightness cannot be adjusted

Such a structure has many limitations in use, because the shape of the palm is a curved surface, and the area where the main lines are located has complex ups and downs, so it is necessary to increase or decrease the number of light sources, and adjust the position and brightness of each light source. It is possible to obtain higher quality palmprint images only by independent adjustment, and the existing equipment obviously cannot meet this requirement

Images