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Biometrical identification device

A technology for biometrics and device identification, applied in the field of access control based on biometrics, it can solve problems such as affecting pore detection, false acceptance and false rejection ratio, and pore data not being completely reliable.

Inactive Publication Date: 2006-10-04
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first problem when using fingerprint-based biometric identification is the fact that none of the fingerprint scanners in use today can tell the difference between a finger and an elaborate fake
The second problem is that this biometric identification system has a non-zero false accept and false reject ratio
[0006] The first disadvantage of this method is that dirt and oil remaining on the surface of the finger will affect the detection of pores
The acquired pore data is therefore not completely reliable and cannot be utilized as the sole source of identification data
The second disadvantage is that cheating is still possible, although cheating creates more difficulties

Method used

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Examples

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Embodiment Construction

[0028] Refer to figure 2 , The inner surface 2 of the personal finger 1 is pressed on the tablet 3 of the acquisition device 4. The acquiring device 4 is used to acquire the internal skin image ISI of the image plane IP of the finger 1, which is located inside the finger 1 which is a distance D from the inner surface 2. The distance D from the inner surface 2 of the finger is preferably selected to be greater than 0.1 mm and less than 0.5 mm.

[0029] image 3 The acquisition device 4 appearing in includes a radiation source 41 for generating a radiation beam 42, such as a laser beam or the like. The acquisition device 4 also includes a focusing device 43, such as an objective lens, for focusing the radiation beam 42 on the image plane IP inside the finger 1. The acquisition device 4 finally includes a detection device 44 for detecting the reflected radiation beam, the reflected beam 45 being reflected from the image plane IP.

[0030] Preferably, the acquisition device 4 includ...

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Abstract

The invention relates to a biometrical identification device for identifying an individual finger (1). An intra-skin image (ISI) is acquired. Said image (ISI), which is located inside the finger at a distance (D) from an inside surface (2) of the finger, comprises sweat pores (P1, P2, P3). Said sweat pores are located as isolated spots in the intra-skin image (ISI). The pore locations (CP1-CPN) are further matched with reference pore locations (RP1-RPM) of a reference intra-skin image (RI) to produce a pore matching score (PMS). The pore matching score (PMS) is compared with a predetermined pore threshold for deciding whether the pore-based identification of the finger (1) is valid or not.

Description

Technical field [0001] The invention relates to a biometric identification device. The invention also relates to a method implemented by using such a device. [0002] The invention particularly relates to the field of access control based on biometrics. Background technique [0003] Such as Figure 1a As shown, the skin on the inside of the finger is covered by a pattern composed of ridges and valleys. As early as a few centuries ago, it has been studied whether these patterns are different for each person, and it is believed that each person has a unique fingerprint. This makes fingerprints suitable for verifying their own unique identity. Most recognition systems use unique features in the pattern of ridges. These features are very important based on the fact that the ridges in the fingerprint pattern are not continuous lines but ends, bifurcations, or lines that make up islands. These special points are called minutiae or macro features. Although fingerprints usually contain a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06K9/00288G06V40/172G06T1/00G06F18/00
Inventor R·亨德里克斯P·T·塔伊尔斯G·卢卡森
Owner KONINK PHILIPS ELECTRONICS NV
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