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Pupil detector and iris identification device

A detection device and pupil technology, applied in character and pattern recognition, image data processing, instruments, etc., can solve the problems of reduced detection accuracy, difficulty in processing eye images in real time, etc., and achieve the effect of high-speed detection

Inactive Publication Date: 2006-10-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to detect pupils with high precision using these methods, it is necessary to process huge image data at high speed. Even if a large CPU with high processing power and a large-capacity memory are used, it may be difficult to process eye images in real time under the current situation. image data
Also, if the amount of CPU processing is reduced to such an extent that image data can be processed in real time, there may be problems such as a decrease in detection accuracy

Method used

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  • Pupil detector and iris identification device
  • Pupil detector and iris identification device
  • Pupil detector and iris identification device

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no. 1 Embodiment

[0049] figure 1 It is a circuit block diagram of an iris authentication device using the pupil detection device according to the first embodiment of the present invention. exist figure 1 In FIG. 2 , in addition to the pupil detection device 200 , the imaging unit 120 , the lighting unit 130 , and the authentication processing unit 140 required to configure the iris authentication device 100 are shown.

[0050] The iris authentication device 100 of the first embodiment includes an imaging unit 120 , a pupil detection device 200 , an authentication processing unit 140 , and an illumination unit 130 . The imaging unit 120 captures an eye image of the user. The pupil detection device 200 detects the pupil position and its radius from the eye image. The authentication processing unit 140 performs personal authentication by comparing the iris code obtained from the eye image with the registered iris code. The illuminating unit 130 irradiates near-infrared rays with an amount of ...

no. 2 Embodiment

[0106] Since the circuit block diagram of the pupil detection device of the second embodiment of the present invention is the same as that of the first embodiment, the same reference numerals as those of the first embodiment are assigned to each of them, and description thereof will be omitted. The pupil detection device of the second embodiment differs greatly from the pupil detection device of the first embodiment in the selection of the image data selected corresponding to each integrating circle in the image data extraction part 220 and the selection of each line memory 224. 1 ~224 L access timing.

[0107] Figure 12 and Figure 13 It is a diagram for explaining the operation of the image data extracting unit 220 in the second embodiment of the present invention. Here, as in the first embodiment, for the sake of simplicity of description, seven line memories 224 1 ~224 7 A partial frame memory 222 is formed, and three concentric integrating circles C are set thereon....

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Abstract

A pupil detector comprises image data extracting section (220) for setting concentric integration circles on an eye image and extracting image data on the eye image present on the circumferences of the integration circles, a go-around integration section for integrating the image data along the circumference of each integration circle, and a pupil position detecting section or detecting the center coordinates of the integration circles as the pupil position coordinates such that the integral calculated by the go-around integration section varies stepwise with respect to the radius of each integration circle. The image data extracting section (220) has randomly-accessible line memories (224 G06T 1 / 00 12 18 1 2005 / 5 / 24 1842818 2006 / 10 / 4 000000000 Matsushita Electric Ind Co., Ltd. Japan Sugita Morio Wakamori Masahiro Fujimatsu Takeshi li zheng yu jing 11247 Japan 2004 / 8 / 2 225364 / 2004 2006 / 3 / 2 PCT / JP2005 / 009419 2005 / 5 / 24 WO2006 / 013669 2006 / 2 / 9 Japanese

Description

technical field [0001] The present invention relates to an iris authentication device used for personal authentication, and more particularly, to a pupil detection device that detects the position of a pupil from an image including eyes (hereinafter referred to as "eye image"). Background technique [0002] Conventionally, various methods of detecting the position of pupils from eye images have been proposed. For example, there is known a method of binarizing (black and white) image data of an eye image (hereinafter referred to as "eye image data") and detecting a circular area in a low-brightness area. Furthermore, it is known to compute the circumcircumferential integral of the image intensity I(x, y) for an arc of a circle of radius r with center coordinates (x0, y0), and to compute this quantity as a function of r as the radius r increases The method of the derivative function of the part, etc. The above-mentioned conventional structure is disclosed in, for example, JP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00A61B5/117A61B5/1171
CPCG06K9/0061G06V40/193
Inventor 杉田守男若森正浩藤松健
Owner PANASONIC CORP