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Multiple iris collecting device using active vision feedback

A technology of iris acquisition and active vision, applied in instrument, character and pattern recognition, acquisition/recognition of eyes and other directions, can solve the problems of difficult alignment, inaccurate information, etc., to achieve the effect of high speed, convenient use, and avoid tilting the head

Active Publication Date: 2010-10-13
BEIJING IRISKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing active adjustment methods are all aimed at the iris recognition technology of one eye. If the user aligns with one eye, he may tilt his head unconsciously, and because the two corners of each eye may be physiologically different from the horizontal Various included angles are formed, and it is impossible to judge whether the head is tilted according to the image of one eye, resulting in problems such as difficult alignment and inaccurate information

Method used

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  • Multiple iris collecting device using active vision feedback
  • Multiple iris collecting device using active vision feedback
  • Multiple iris collecting device using active vision feedback

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] figure 1 is a schematic diagram of the first embodiment of the present invention. refer to figure 1 , the lighting unit 1 is located around or next to the collection unit 2, and is used to illuminate the iris 3 of the eye. Since the lighting unit 1 has a certain emission angle, the feedback unit 4 has a certain observation angle, and the collection unit 2 also has a certain collection angle and depth of field. Range, adjust the optical axis of the lighting unit 1, the acquisition unit 2, and the feedback unit 4, so that the following requirements can be met in a space (called an identifiable space volume) with a certain distance from the equipment:

[0026] 1. The user can clearly see the feedback displayed by the feedback unit 4 within this range,

[0027]2. The lighting unit 1 can illuminate the user's iris 3 with appropriate energy,

[0028] 3. The collection unit 2 can clearly collect the user's iris image, and obtain an image that meets the collection requiremen...

Embodiment approach 2

[0038] Figure 5 A schematic diagram of another embodiment of the invention is shown. Such as Figure 5 As shown, the acquisition unit 2 is facing the user's eyes, and the acquisition unit 2 is composed of a fixed-focus lens, an infrared-sensitive CCD camera, an infrared filter and a half-mirror 6 . The fixed focus lens has a focal length of 30mm and an object distance of 30cm. The CCD camera adopts an N-made 600 line-sensing infrared camera, and the output video signal is transmitted to the host through a video capture card. The half mirror 6 can transmit infrared light and reflect all visible light. The images of the user's eyes can be collected through the half-mirror 6, and the content displayed by the feedback unit 4 will not affect the collected images. The feedback unit 4 is a small CRT display with a resolution of 640×480 and an angle of 90 degrees to the viewing direction of the user. The displayed content of the feedback unit 4 is reflected to the user through t...

Embodiment approach 3

[0042] Figure 7 A schematic diagram of another embodiment of the invention is shown. In this embodiment, only one set of optical lenses and an image acquisition chip can collect the iris information of the two eyes. Such as Figure 7 As shown, the acquisition unit 2 is composed of a fixed-focus lens, an infrared sensitive CMOS camera, an infrared filter, a mirror 7 and a half-mirror 6, and the half-mirror 6 in the acquisition unit 2 can pass through the infrared light , which reflects all visible light. The image of the user's eyes is projected to the reflector 7, and by controlling the rotation of the reflector 7, the acquisition unit 2 realizes the time-sharing acquisition of the user's eyes. Under the rapid rotation of the reflector 7, the system acquisition speed can reach 5-5 per second per eye. 10 frames.

[0043] The feedback unit 4 is a small CRT display with a resolution of 640×480 and an angle of 90 degrees to the viewing direction of the user. The displayed co...

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Abstract

A multi-eye iris collection device applying active vision feedback consists of collection unit formed by one set of optical lens and image collection chip as well as used for collecting iris information of user, illumination unit formed by one or multiple illumination component being able to radiate energy outwards and used for combining with or separating from said collection unit, feed back unit formed by image display component with display region being divided into two sections and used for separately displaying image of user two eye in order to let user regulate position of two eyes according to image displayed in said displaying region.

Description

technical field [0001] The patent of the present invention belongs to the technical field of optical devices and the field of electrical equipment, and in particular relates to an iris collection device utilizing self-feedback and active cooperation of users. Background technique [0002] Iris recognition technology is a commonly used identification technology today. The first step in its work is the acquisition of iris images. It is also a relatively difficult step and requires the comprehensive application of optical, mechanical and electrical technologies. Due to the special properties of the iris: small area (average diameter of about 11 mm), and large color differences among different races, general camera methods cannot capture iris images that can be used for identification. Iris recognition must use a large magnification lens and active lighting. Westerners have lighter irises, which can be illuminated by visible light, while Orientals have darker irises, which must...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06K9/00604G06V40/19
Inventor 魏育成汪锐
Owner BEIJING IRISKING
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