SE9804285D0 - Method and apparatus for detecting objects - Google Patents

Method and apparatus for detecting objects

Info

Publication number
SE9804285D0
SE9804285D0 SE9804285A SE9804285A SE9804285D0 SE 9804285 D0 SE9804285 D0 SE 9804285D0 SE 9804285 A SE9804285 A SE 9804285A SE 9804285 A SE9804285 A SE 9804285A SE 9804285 D0 SE9804285 D0 SE 9804285D0
Authority
SE
Sweden
Prior art keywords
image
scene
images
sensor
radiation
Prior art date
Application number
SE9804285A
Other languages
Swedish (sv)
Other versions
SE9804285L (en
SE514646C2 (en
Inventor
Per Boerjesson
Original Assignee
Saab Dynamics Ab
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 Saab Dynamics Ab filed Critical Saab Dynamics Ab
Priority to SE9804285A priority Critical patent/SE514646C2/en
Publication of SE9804285D0 publication Critical patent/SE9804285D0/en
Priority to EP99963806A priority patent/EP1149310A1/en
Priority to PCT/SE1999/002273 priority patent/WO2000039607A1/en
Publication of SE9804285L publication Critical patent/SE9804285L/en
Publication of SE514646C2 publication Critical patent/SE514646C2/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/04—Systems determining the presence of a target

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The invention presented here relates to a method for detecting the presence of objects by means of an optical sensor in a scene within the sensor's field of view. The sensor is made record images of the scene so that each individual image element is assigned a value corresponding to the detected heat radiation within the infrared wavelength range. The method is characterised in that the sensor records (1, 2) at least a pair of consecutive images of the scene, where one of the images in each pair is recorded (2) under illumination of the scene by means of a radiation source. Thereafter, a comparison image is created (4) such that each image element in the comparison image is assigned a value corresponding chiefly to a differential or quotient between the radiation values for corresponding image elements in the images recorded (2) under illumination, and the radiation values for corresponding image elements in the images recorded (1) without illumination. The image elements of the created comparison image are scanned, and the image element values that exceed a certain threshold level are marked (5) as an optical aperture within the infrared wavelength range. The invention also comprises a device for executing the method above.
SE9804285A 1998-12-11 1998-12-11 Method and device for detecting objects with an IR camera SE514646C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9804285A SE514646C2 (en) 1998-12-11 1998-12-11 Method and device for detecting objects with an IR camera
EP99963806A EP1149310A1 (en) 1998-12-11 1999-12-07 Method and device for detecting objects
PCT/SE1999/002273 WO2000039607A1 (en) 1998-12-11 1999-12-07 Method and device for detecting objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9804285A SE514646C2 (en) 1998-12-11 1998-12-11 Method and device for detecting objects with an IR camera

Publications (3)

Publication Number Publication Date
SE9804285D0 true SE9804285D0 (en) 1998-12-11
SE9804285L SE9804285L (en) 2000-06-12
SE514646C2 SE514646C2 (en) 2001-03-26

Family

ID=20413622

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9804285A SE514646C2 (en) 1998-12-11 1998-12-11 Method and device for detecting objects with an IR camera

Country Status (3)

Country Link
EP (1) EP1149310A1 (en)
SE (1) SE514646C2 (en)
WO (1) WO2000039607A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909182B1 (en) * 2006-11-28 2011-06-24 Compagnie Ind Des Lasers Cilas METHOD AND DEVICE FOR DETECTING AN OBJECT CAPABLE OF RETROREFLECTING LIGHT

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220164A (en) * 1992-02-05 1993-06-15 General Atomics Integrated imaging and ranging lidar receiver with ranging information pickoff circuit
JP3621123B2 (en) * 1993-12-28 2005-02-16 株式会社トプコン Surveying instrument

Also Published As

Publication number Publication date
WO2000039607A1 (en) 2000-07-06
SE9804285L (en) 2000-06-12
EP1149310A1 (en) 2001-10-31
SE514646C2 (en) 2001-03-26

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