CA2351086A1 - High contrast, low distortion optical acquisition system for image capturing - Google Patents

High contrast, low distortion optical acquisition system for image capturing Download PDF

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Publication number
CA2351086A1
CA2351086A1 CA002351086A CA2351086A CA2351086A1 CA 2351086 A1 CA2351086 A1 CA 2351086A1 CA 002351086 A CA002351086 A CA 002351086A CA 2351086 A CA2351086 A CA 2351086A CA 2351086 A1 CA2351086 A1 CA 2351086A1
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CA
Canada
Prior art keywords
light
image capturing
acquisition system
high contrast
low distortion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002351086A
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French (fr)
Other versions
CA2351086C (en
Inventor
Harry H. Teng
Sung-Chan Jo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SecuGen Corp
Original Assignee
Secugen Corporation
Harry H. Teng
Sung-Chan Jo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Secugen Corporation, Harry H. Teng, Sung-Chan Jo filed Critical Secugen Corporation
Publication of CA2351086A1 publication Critical patent/CA2351086A1/en
Application granted granted Critical
Publication of CA2351086C publication Critical patent/CA2351086C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition

Abstract

An apparatus and method for acquiring an image of a patterned object such as a fingerprint including a light refracting device, a focusing lens, and a light source. The light refracting device can, for example, be a prism and includes an imaging surface, a light receiving surface and a viewing surface. Incident light from the light source is projected through the light receiving surface and reflected off a surface other than the imaging surface. This reflected light is then projected onto the imaging surface to create an image of the patterned object from substantially all scattered light through the viewing surface. The lens is placed adjacent to the viewing surface to focus the light on an image sensor.
CA002351086A 1998-11-12 1999-11-12 High contrast, low distortion optical acquisition system for image capturing Expired - Fee Related CA2351086C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/191,428 1998-11-12
US09/191,428 US6381347B1 (en) 1998-11-12 1998-11-12 High contrast, low distortion optical acquistion system for image capturing
PCT/US1999/027051 WO2000028469A2 (en) 1998-11-12 1999-11-12 High contrast, low distortion optical acquisition system for image capturing

Publications (2)

Publication Number Publication Date
CA2351086A1 true CA2351086A1 (en) 2000-05-18
CA2351086C CA2351086C (en) 2005-08-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA002351086A Expired - Fee Related CA2351086C (en) 1998-11-12 1999-11-12 High contrast, low distortion optical acquisition system for image capturing

Country Status (13)

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US (2) US6381347B1 (en)
EP (1) EP1131775B1 (en)
JP (2) JP4294872B2 (en)
KR (1) KR100429302B1 (en)
CN (1) CN100373398C (en)
AT (1) ATE302978T1 (en)
AU (1) AU1725600A (en)
CA (1) CA2351086C (en)
DE (1) DE69926908T2 (en)
ES (1) ES2249047T3 (en)
HK (2) HK1036139A1 (en)
TW (1) TW511038B (en)
WO (1) WO2000028469A2 (en)

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