KR20020047403A - fingerprints pattern sensing method - Google Patents

fingerprints pattern sensing method Download PDF

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Publication number
KR20020047403A
KR20020047403A KR1020000075791A KR20000075791A KR20020047403A KR 20020047403 A KR20020047403 A KR 20020047403A KR 1020000075791 A KR1020000075791 A KR 1020000075791A KR 20000075791 A KR20000075791 A KR 20000075791A KR 20020047403 A KR20020047403 A KR 20020047403A
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KR
South Korea
Prior art keywords
fingerprint
finger
recognition
data
sensor
Prior art date
Application number
KR1020000075791A
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Korean (ko)
Inventor
이종현
Original Assignee
류정열
기아자동차주식회사
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Application filed by 류정열, 기아자동차주식회사 filed Critical 류정열
Priority to KR1020000075791A priority Critical patent/KR20020047403A/en
Publication of KR20020047403A publication Critical patent/KR20020047403A/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1312—Sensors therefor direct reading, e.g. contactless acquisition
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
    • G06F2218/02—Preprocessing
    • G06F2218/04—Denoising

Abstract

PURPOSE: A method for sensing the fingerprint recognition is provided not to remain the image of a fingerprint while recognizing the fingerprint without contacting the fingerprint with a surface of a recognition lens. CONSTITUTION: A semiconductor sensor recognizes the fingerprint. When a recognition window(10) approaches and slides to a finger(20), the grayscale value is converted into a binary number and the noise is removed by a median filter. The scan speed is controlled by comparing the data with a memory buffer and the data is output from the memory buffer. An LED lighting the finger, a linear array sensor, and a control circuit combining the scan speed and the image of the ginger are needed to recognize the fingerprint. If the finger is scanned by the sensor, a width of the finger is measured and a proper DPI(Dot Per Inch) is set at the initial scan. The sensor reconfigures the accurate image data by measuring the change of the speed while scanning the finger.

Description

지문인식 센싱방법 {fingerprints pattern sensing method }Fingerprints sensing method {fingerprints pattern sensing method}

본 발명은 컴퓨터나 도어 등의 작동스위치로 주로 사용되는 지문을 인식할 수 있도록 하는 지문인식 센싱방법에 관한 것으로, 더 자세하게는 인식렌즈의 표면에 손가락을 접촉시키지 않고서도 지문을 인식할 수 있도록 한 것에 관한 것이다.The present invention relates to a fingerprint recognition sensing method for recognizing a fingerprint mainly used as an operation switch such as a computer or a door, and more particularly, to recognize a fingerprint without touching a finger on the surface of the recognition lens. It's about things.

최근들어 사람마다 지문이 각기 다른 것을 이용하여 컴퓨터나 도어 등의 작동스위치로 지문을 사용하는 예가 많은 바, 대부분의 지문인식장치에서 사용되는 종래의 지문인식 센싱방법은 주로 광학형(optical type)으로 프리즘(prism)면에 있는 전반사/산란에 의한 빛의 강약으로 지문의 패턴을 검출하게 되며, 반드시 인식렌즈에 손가락의 지문은 접촉시키야만 하는 것이었다.Recently, many people use fingerprints as operation switches such as computers or doors by using different fingerprints for each person. The conventional fingerprint recognition method used in most fingerprint recognition devices is mainly optical type. The pattern of the fingerprint was detected by the intensity of the light due to total reflection / scattering on the prism plane, and the fingerprint of the finger must be brought into contact with the recognition lens.

그러나 인식렌즈에 손가락을 직접 접촉시키는 종래의 지문인식 센싱방법은 인식렌즈에 지문의 잔상이 남기 때문에 범죄자 등이 이를 채취한 후 복사하여 재사용할 수 있게 되므로 범죄에 취약하게 되는 문제가 있었다.However, the conventional fingerprint recognition sensing method of directly contacting a finger with a recognition lens has a problem of being vulnerable to crime because the afterimage of the fingerprint remains on the recognition lens, so that a criminal or the like can copy and reuse it.

본 발명은 상기 종래의 실정을 감안하여 안출한 것이며, 그 목적이 인식렌즈의 표면에 손가락을 직접 접촉시키지 않고서도 지문을 인식할 수 있도록 하는 것에 의해 지문 잔상이 남지 않도록 하는 지문인식 센싱방법을 제공하는 데에 있는 것이다.The present invention has been made in view of the above-described conventional situation, and its object is to provide a fingerprint recognition sensing method that does not leave an afterimage of a fingerprint by allowing a fingerprint to be recognized without directly touching a surface of a recognition lens. It is to do it.

도 1은 본 발명의 한 실시예의 인식창 상태도1 is a state diagram of the recognition window of an embodiment of the present invention

도 2는 동 인식창의 사용상태도2 is a state diagram used in the recognition window

* 도면의 주요 부분에 대한 부호 설명 *Explanation of symbols on the main parts of the drawings

10 : 인식창20 : 손가락10: recognition window 20: finger

본 발명은 상기의 목적을 달성하기 위하여 반도체센서로 지문을 인식하도록 하고 인식창에 손가락을 근접시켜 슬라이딩시키게 되면 그레이스케일(grayscale)값을 이진수로 변환시킨 후 메디안 필터(median filter)에서 노이즈(noise)를 제거하고 메모리 버퍼(memory buffer)와 데이터(data)를 비교하여 스캔(scan) 속도를 조절하고 메모리 버퍼(memory buffer)로부터 데이터(data)를 출력하도록 하는 것을 특징으로 하며, 이하 그 구체적인 기술내용을 첨부도면에 의거하여 더욱 자세히 설명하면 다음과 같다.In order to achieve the above object, the present invention provides a method of recognizing a fingerprint with a semiconductor sensor and sliding a finger near a recognition window to convert grayscale values into binary numbers, and then to a noise in a median filter. ), And compare the memory buffer and data to adjust the scan speed and output the data from the memory buffer. The content is described in more detail based on the attached drawings as follows.

즉, 도 1에는 본 발명의 한 실시예의 인식창이 도시되어 있고, 도 2에는 동 실시예의 사용상태도가 도시되어 있는 바, 본 발명은 도 1 및 도 2와 같이 반도체센서(sensor)로 지문을 인식하도록 하고 인식창(10)에 손가락(20)을 근접시켜 슬라이딩시키게 되면 그레이스케일(grayscale)값을 이진수로 변환시킨 후 메디안 필터(median filter)에서 노이즈(noise)를 제거하고 메모리 버퍼(memory buffer)와 데이터(data)를 비교하여 스캔(scan) 속도를 조절하고 메모리 버퍼(memory buffer)로부터 데이터(data)를 출력하도록 하여서 되는 것이다.That is, FIG. 1 shows a recognition window of one embodiment of the present invention, and FIG. 2 shows a use state diagram of the embodiment. The present invention recognizes a fingerprint with a semiconductor sensor as shown in FIGS. 1 and 2. If the user slides the finger 20 close to the recognition window 10, the grayscale value is converted into a binary number, the noise is removed from the median filter, and the memory buffer is removed. By comparing the data with the data, the scan speed is adjusted and the data is output from the memory buffer.

상기의 본 발명에 의한 지문인식을 하기 위해서는 손가락을 조명하기 위한 광원(LED) 및 리니어 어레이 센서(linear array sensor), 그리고 손가락(20)의 스캔 속도와 이미지(image)를 조합하기 위한 컨트롤러회로(controller circuit)가 필요하다.In order to perform fingerprint recognition according to the present invention, a light source (LED) and a linear array sensor for illuminating a finger, and a controller circuit for combining a scan speed and an image of the finger 20 ( controller circuit is required.

상기와 같은 본 발명에 있어서는 적색의 광원(LED)이 켜진 상태에서 센서에 손가락(20)을 스캔시키면 스캔초기에 손가락의 폭이 측정되고 적합한 해상도(DPI)가 자동으로 정해지게 되며, 손가락(20)이 스캔되는 동안 센서는 속도의 변화를 측정하여 기하학적으로 정확한 이미지 데이터(image data)를 재구성하게 된다.In the present invention as described above, when the finger 20 is scanned on the sensor while the red light source (LED) is turned on, the width of the finger is measured at the beginning of the scan, and the appropriate resolution (DPI) is automatically determined. During the scan, the sensor measures the change in velocity to reconstruct the geometrically accurate image data.

이상에서 설명한 바와 같이 본 발명은 인식창(10)에 손가락(20)을 직접 접촉시키지 않고서 근접시킨 손가락(20)을 인식창(10) 상부에서 슬라이드시키는 것에 의해 지문을 인식하도록 한 것으로, 본 발명에 의하면 인식창(10)에 지문의 잔상이 전혀 남지 않게 되므로 범죄자가 인식창(10)으로부터 지문을 채취할 수 없게 되어 그에 따른 범죄를 예방할 수 있게 되고, 지문인식장치의 보안성을 증대시킬 수 있게 되는 등의 효과를 얻을 수 있게 된다.As described above, the present invention is to recognize the fingerprint by sliding the finger 20 near the recognition window 10 without directly contacting the finger 20 to the recognition window 10, the present invention According to the recognition window 10, the afterimage of the fingerprint is not left at all, so that the criminal can not extract the fingerprint from the recognition window 10 can prevent the resulting crime, can increase the security of the fingerprint recognition device You can get effects such as the.

Claims (1)

반도체센서(sensor)로 지문을 인식하도록 하고 인식창(10)에 손가락(20)을 근접시켜 슬라이딩시키게 되면 그레이스케일(grayscale)값을 이진수로 변환시킨 후 메디안 필터(median filter)에서 노이즈(noise)를 제거하고 메모리 버퍼(memory buffer)와 데이터(data)를 비교하여 스캔(scan) 속도를 조절하고 메모리 버퍼(memory buffer)로부터 데이터(data)를 출력하도록 한 것을 특징으로 하는 지문인식 센싱방법.When a fingerprint is recognized by a semiconductor sensor and the finger 20 is moved close to the recognition window 10, the gray scale value is converted into a binary number, and then a noise is generated in the median filter. The fingerprint recognition sensing method of claim 2, wherein the memory buffer and the data are compared to adjust the scan speed and output data from the memory buffer.
KR1020000075791A 2000-12-13 2000-12-13 fingerprints pattern sensing method KR20020047403A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030067937A (en) * 2002-02-09 2003-08-19 임경훈 Improvement of fingerprint image by using of median filter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01175687A (en) * 1987-12-29 1989-07-12 Matsushita Electric Ind Co Ltd Device for collating record of fingerprint data
JPH04158434A (en) * 1990-10-23 1992-06-01 Toshiba Corp Pointing device for display device
KR950029986A (en) * 1994-04-02 1995-11-24 박규태 Uneven surface image pickup device
KR970049828A (en) * 1995-12-29 1997-07-29 송병남 Multifunctional Image Data Input Device Using Prism
KR20000013995A (en) * 1998-08-10 2000-03-06 최환수 Fingerprint image detection device and apparatus thereof
KR20000047742A (en) * 1998-12-10 2000-07-25 타테이시 요시오 Finger-print identification apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01175687A (en) * 1987-12-29 1989-07-12 Matsushita Electric Ind Co Ltd Device for collating record of fingerprint data
JPH04158434A (en) * 1990-10-23 1992-06-01 Toshiba Corp Pointing device for display device
KR950029986A (en) * 1994-04-02 1995-11-24 박규태 Uneven surface image pickup device
KR970049828A (en) * 1995-12-29 1997-07-29 송병남 Multifunctional Image Data Input Device Using Prism
KR20000013995A (en) * 1998-08-10 2000-03-06 최환수 Fingerprint image detection device and apparatus thereof
KR20000047742A (en) * 1998-12-10 2000-07-25 타테이시 요시오 Finger-print identification apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030067937A (en) * 2002-02-09 2003-08-19 임경훈 Improvement of fingerprint image by using of median filter

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