GB2414790A - Detection of humans or animals by comparing infrared and visible light images - Google Patents

Detection of humans or animals by comparing infrared and visible light images Download PDF

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Publication number
GB2414790A
GB2414790A GB0412505A GB0412505A GB2414790A GB 2414790 A GB2414790 A GB 2414790A GB 0412505 A GB0412505 A GB 0412505A GB 0412505 A GB0412505 A GB 0412505A GB 2414790 A GB2414790 A GB 2414790A
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GB
United Kingdom
Prior art keywords
skin
humans
animals
detection
light
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.)
Withdrawn
Application number
GB0412505A
Other versions
GB0412505D0 (en
Inventor
John Tyrer
Leon Lobo
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.)
Laser Optical Engineering Ltd
Original Assignee
Laser Optical Engineering Ltd
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 Laser Optical Engineering Ltd filed Critical Laser Optical Engineering Ltd
Priority to GB0412505A priority Critical patent/GB2414790A/en
Publication of GB0412505D0 publication Critical patent/GB0412505D0/en
Priority to PCT/GB2005/002202 priority patent/WO2005119571A1/en
Publication of GB2414790A publication Critical patent/GB2414790A/en
Withdrawn legal-status Critical Current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
    • G06V40/16—Human faces, e.g. facial parts, sketches or expressions
    • G06V40/161—Detection; Localisation; Normalisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/143—Sensing or illuminating at different wavelengths
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Image Processing (AREA)

Abstract

A system for detecting humans or animals in a scene comprises a visible camera and a near-infrared camera which view substantially the same scene. In one embodiment a single image is detected by both cameras, via a beam splitter. The infra red image is subtracted from the visible image to enhance the presence of skin, which absorbs near-infra red radiation.

Description

Page 1 of 3 2414790
A MULTI-SPECTRAL SYSTEM FOR THE IDENTIFICATION
OF THE PRESENCE OF SKIN TISSUE
Description
This invention relates to the use of visible and infra red light to identify the presence of skin tissue. Present systems for observing the presence of humans or other living things rely either upon the skill of an operator in interpreting images or in complicated computer based methods for recognising the presence of a face. Existing systems can also be limited in their use due to the risk of eye hazard to the subject given the power of the light source.
This invention utilises the property whereby infra red light of wavelength between 900 and 1700 nanometres is absorbed by human skin but reflected by hair, clothing and surrounding material. By using a video camera designed only to obtain an image at these wavelengths skin appears as a dark area. This image is then subtracted from an image acquired by a visible camera. This difference enhances the presence of skin, negating the requirement for a laser source at the infrared wavelength. This can then be monitored by an observer or processed using a computer. This is distinct from the state of the art as this property cannot be detected by existing conventional equipment.
A person skilled in the art will recognise that there are many possible ways of implementing the invention which could be adopted without departing from the scope of the invention.
An example of the system is displayed in the attached drawing. In figure 1 ambient light illuminates target area D. Camera B & C observes the target area. Alternatively, in figure 2, a beam splitter E is used to enable co-axial imaging of the target area D. An observer or a computer system monitors the images obtained to determine the presence of humans.

Claims (10)

Page,2 of 3 A MULTISPECTRAL SYSTEM FOR THE IDENTIFICATION OF THE PRESENCE OF SKIN TISSUE CLAIMS
1. A system for the detection of humans and other animals comprising two cameras which operate in the infra red and visible, and an analysis system which detects the dark area caused by skin present in the target area absorbing the light at this wavelength whilst other items reflect some of the light. The absorption of light at this wavelength by skin enables discrimination of the presence of the skin within a disparate background. The difference between the visible and infrared images enhances this absorption.
2. A system as claimed in claim 1 where the wavelength of operation is between 900 and 1700 nanometres, and 400nm to 700nm.
3. A system as claimed in claim 1 including an infra red camera which can be tuned to the specific wavelength range in claim 2 and captures an image of the target area.
4. A detection system as claimed in claim 1 comprising a human observer monitoring the captured images in Claim 3 for the presence of dark areas indicative of human skin.
5. A detection system as claimed in claim 1 comprising a computer system which can process the images captured (as claimed in claim 3) by the camera enabling automatic identification of the presence of humans.
6. A computer system as claimed in claim 5 which processes the captured images via a neural network.
Page3 of 3
7. A computer system as claimed in claim 5 which processes the captured images via pattern matching.
8. A computer system as claimed in claim 7 which processes the captured images via optical pattern matching.
9. A system as claimed in claim 1 which enables faces to be safely illuminated by ambient light without detriment to eyes or other organic tissue.
10. A system as claimed in claim 1 which can be applied to detect humans or other animals in situations such as cars, crowds or situations where individuals would be concealed, for example by the use of camouflage.
GB0412505A 2004-06-04 2004-06-04 Detection of humans or animals by comparing infrared and visible light images Withdrawn GB2414790A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0412505A GB2414790A (en) 2004-06-04 2004-06-04 Detection of humans or animals by comparing infrared and visible light images
PCT/GB2005/002202 WO2005119571A1 (en) 2004-06-04 2005-06-03 Imaging apparatus and method for vehicle occupant determination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0412505A GB2414790A (en) 2004-06-04 2004-06-04 Detection of humans or animals by comparing infrared and visible light images

Publications (2)

Publication Number Publication Date
GB0412505D0 GB0412505D0 (en) 2004-07-07
GB2414790A true GB2414790A (en) 2005-12-07

Family

ID=32696681

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0412505A Withdrawn GB2414790A (en) 2004-06-04 2004-06-04 Detection of humans or animals by comparing infrared and visible light images

Country Status (2)

Country Link
GB (1) GB2414790A (en)
WO (1) WO2005119571A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0703031D0 (en) * 2007-02-15 2007-03-28 Laser Optical Engineering Ltd Method and apparatus for counting vehicle occupants
US8520074B2 (en) 2010-12-14 2013-08-27 Xerox Corporation Determining a total number of people in an IR image obtained via an IR imaging system
US9019358B2 (en) 2011-02-08 2015-04-28 Xerox Corporation Method for classifying a pixel of a hyperspectral image in a remote sensing application
DE102013015600A1 (en) * 2013-09-19 2015-03-19 Mühlbauer Ag Apparatus, system and method for identifying a person

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307816A (en) * 1995-12-01 1997-06-04 Fuji International Productions Combined infra-red and visible spectrum television camera arrangement
US5686889A (en) * 1996-05-20 1997-11-11 The United States Of America As Represented By The Secretary Of The Army Infrared sniper detection enhancement
US5820558A (en) * 1994-12-02 1998-10-13 Non-Invasive Technology, Inc. Optical techniques for examination of biological tissue
WO2001003050A1 (en) * 1999-07-02 2001-01-11 Hypermed Imaging, Inc. Imaging apparatus with means for fusing thermal and hyperspectral images
JP2002260167A (en) * 2001-03-05 2002-09-13 Natl Inst For Land & Infrastructure Management Mlit Infrared-complementary visible vehicle detection system
JP2003006642A (en) * 2001-06-22 2003-01-10 Toshihiko Shimizu Image processor utilizing thermal image
WO2004008403A2 (en) * 2002-07-15 2004-01-22 Magna B.S.P. Ltd. Method and apparatus for implementing multipurpose monitoring system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7076088B2 (en) * 1999-09-03 2006-07-11 Honeywell International Inc. Near-infrared disguise detection

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5820558A (en) * 1994-12-02 1998-10-13 Non-Invasive Technology, Inc. Optical techniques for examination of biological tissue
GB2307816A (en) * 1995-12-01 1997-06-04 Fuji International Productions Combined infra-red and visible spectrum television camera arrangement
US5686889A (en) * 1996-05-20 1997-11-11 The United States Of America As Represented By The Secretary Of The Army Infrared sniper detection enhancement
WO2001003050A1 (en) * 1999-07-02 2001-01-11 Hypermed Imaging, Inc. Imaging apparatus with means for fusing thermal and hyperspectral images
JP2002260167A (en) * 2001-03-05 2002-09-13 Natl Inst For Land & Infrastructure Management Mlit Infrared-complementary visible vehicle detection system
JP2003006642A (en) * 2001-06-22 2003-01-10 Toshihiko Shimizu Image processor utilizing thermal image
WO2004008403A2 (en) * 2002-07-15 2004-01-22 Magna B.S.P. Ltd. Method and apparatus for implementing multipurpose monitoring system

Also Published As

Publication number Publication date
WO2005119571A1 (en) 2005-12-15
GB0412505D0 (en) 2004-07-07

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)