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Multiple iris collecting device using active vision feedback

A technology of active vision and iris collection, applied in instruments, character and pattern recognition, acquisition/recognition of eyes, etc., can solve problems such as inaccurate information and difficult alignment, and achieve improved recognition speed, improved accuracy, and fast speed Effect

Active Publication Date: 2007-10-10
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 physiological

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Embodiment 1:

[0023] FIG. 1 is a schematic diagram of a first embodiment of the present invention. Referring to Figure 1, the lighting unit is located around or beside the acquisition unit to illuminate the iris of the eye. Since the lighting unit has a certain emission angle, the feedback unit has a certain observation angle, and the collection unit also has a certain collection angle and depth of field range. Adjust The optical axis of the lighting unit, the acquisition unit, and the feedback unit can meet the following requirements in a piece of space (called an identifiable space volume) at a certain distance from the device:

[0024] 1. The user can clearly see the feedback displayed by the feedback unit within this range.

[0025] 2. The lighting unit can illuminate the user's iris with suitable energy,

[0026] 3. The acquisition unit can clearly acquire the iris image of the user, and obtain an image that meets the acquisition requirements.

[0027]The devi...

Example Embodiment

[0035] Implementation 2:

[0036] Figure 5 shows a schematic diagram of another embodiment of the present invention. As shown in Figure 1, the acquisition unit is facing the user's eyes, and the acquisition unit is composed of a fixed-focus lens, an infrared-sensing CCD camera, an infrared filter and a transflective mirror. The prime lens has a focal length of 30mm and an object distance of 30cm. The CCD camera adopts N system 600 line-sensing infrared camera, and the output video signal is transmitted to the host through the video capture card. Transflectors transmit infrared light and reflect all visible light. The image of the user's eyes can be captured by the semi-transparent mirror, and the content displayed by the feedback unit will not affect the captured image. The feedback unit is a small CRT display with a resolution of 640*480 and a 90-degree angle to the user's viewing direction. The display content of the feedback unit is projected to the user through the hal...

Example Embodiment

[0039] Embodiment 3:

[0040] Figure 7 shows a schematic diagram of another embodiment of the present invention. In this embodiment, only one set of optical lens and image acquisition chip can acquire the iris information of two eyes. As shown in Figure 7, the acquisition unit is composed of a fixed-focus lens, an infrared-sensitive CMOS camera chip, an infrared filter, a mirror group and a semi-transparent mirror. The semi-transparent mirror in the acquisition unit can transmit infrared light. , while reflecting all visible light. The image of the user's eyes is projected to the reflector, and by controlling the rotation of the reflector, the acquisition unit realizes the time-sharing acquisition of the user's eyes. With the rapid rotation of the reflector, the system's acquisition speed can reach 5 to 10 frames per second for each eye.

[0041] The feedback unit is a small CRT display with a resolution of 640*480 and a 90-degree angle to the user's viewing direction. The ...

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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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IPC IPC(8): G06K9/00
CPCG06K9/00604G06V40/19
Inventor 魏育成汪锐
Owner BEIJING IRISKING
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