WO1990001706A3 - Traitement de signaux pour l'acquisisiton autonome d'objets dans un fond a echos parasites - Google Patents

Traitement de signaux pour l'acquisisiton autonome d'objets dans un fond a echos parasites Download PDF

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Publication number
WO1990001706A3
WO1990001706A3 PCT/US1989/002877 US8902877W WO9001706A3 WO 1990001706 A3 WO1990001706 A3 WO 1990001706A3 US 8902877 W US8902877 W US 8902877W WO 9001706 A3 WO9001706 A3 WO 9001706A3
Authority
WO
WIPO (PCT)
Prior art keywords
image frame
image
generated
difference
difference image
Prior art date
Application number
PCT/US1989/002877
Other languages
English (en)
Other versions
WO1990001706A2 (fr
Inventor
Thomas K Lo
Jack M Sacks
Nam D Banh
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Priority to JP1510627A priority Critical patent/JPH0664613B2/ja
Publication of WO1990001706A2 publication Critical patent/WO1990001706A2/fr
Publication of WO1990001706A3 publication Critical patent/WO1990001706A3/fr
Priority to NO901560A priority patent/NO901560D0/no
Priority to KR1019900700719A priority patent/KR930007549B1/ko

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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/78—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using electromagnetic waves other than radio waves
    • G01S3/782—Systems for determining direction or deviation from predetermined direction
    • G01S3/785—Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system
    • G01S3/786—Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system the desired condition being maintained automatically
    • G01S3/7864—T.V. type tracking systems
    • G01S3/7865—T.V. type tracking systems using correlation of the live video image with a stored image
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/20—Analysis of motion
    • G06T7/254—Analysis of motion involving subtraction of images

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Electromagnetism (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Image Analysis (AREA)
  • Image Processing (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

On a mis au point un procédé et un appareil permettant la détection d'objets mobiles à silhouette définie par rapport à un écho parasite de fond. On utilise un sous-système (12) de corrélation afin d'enregistrer le fond d'une image actuelle (mémoire d'images 1) avec une image prise deux périodes de temps plus tôt (mémoire d'images 3). On crée une première image de différence par soustraction des images enregistrées, la première image de différence étant filtrée par un filtre (34) passe-bas et son seuil établi par un segmenteur (36) à trois niveaux. On crée une seconde image de différence de la même manière entre l'image actuelle et une autre image prise à une période de temps ultérieure différente. On filtre et on établit le seuil de cette seconde image de différence de la même manière. Les deux images de différence sont combinées de manière logique par la porte ET (39) dont la sortie est reliée à un formateur, à une trieuse et à un extracteur (40) de caractéristiques. On crée des fichiers de suivi dans une UC (16) afin de comparer les caractéristiques d'images extraites ultérieurement avec des caractéristiques extraites stockées antérieurement.
PCT/US1989/002877 1988-08-08 1989-07-03 Traitement de signaux pour l'acquisisiton autonome d'objets dans un fond a echos parasites WO1990001706A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1510627A JPH0664613B2 (ja) 1988-08-08 1989-07-03 散乱物が存在する背景内にある目標物を自動獲得するための装置及び方法
NO901560A NO901560D0 (no) 1988-08-08 1990-04-05 Signalbehandling for autonom ervervelse av objekter i stoeyflekkbelagt bakgrunn.
KR1019900700719A KR930007549B1 (ko) 1988-08-08 1990-04-06 정지 클러터를 포함하고 있는 감지기 시계내의 움직이는 물체를 자동적으로 검출하는 장치 및 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/229,390 US4937878A (en) 1988-08-08 1988-08-08 Signal processing for autonomous acquisition of objects in cluttered background
US229,390 1988-08-08

Publications (2)

Publication Number Publication Date
WO1990001706A2 WO1990001706A2 (fr) 1990-02-22
WO1990001706A3 true WO1990001706A3 (fr) 1990-03-22

Family

ID=22861028

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1989/002877 WO1990001706A2 (fr) 1988-08-08 1989-07-03 Traitement de signaux pour l'acquisisiton autonome d'objets dans un fond a echos parasites

Country Status (11)

Country Link
US (1) US4937878A (fr)
EP (1) EP0380658B1 (fr)
JP (1) JPH0664613B2 (fr)
KR (1) KR930007549B1 (fr)
AU (1) AU619611B2 (fr)
CA (1) CA1313704C (fr)
DE (1) DE68910498T2 (fr)
ES (1) ES2016049A6 (fr)
IL (1) IL90898A (fr)
TR (1) TR25266A (fr)
WO (1) WO1990001706A2 (fr)

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Also Published As

Publication number Publication date
DE68910498D1 (de) 1993-12-09
WO1990001706A2 (fr) 1990-02-22
AU619611B2 (en) 1992-01-30
US4937878A (en) 1990-06-26
KR900702378A (ko) 1990-12-06
EP0380658B1 (fr) 1993-11-03
ES2016049A6 (es) 1990-10-01
AU4400589A (en) 1990-03-05
CA1313704C (fr) 1993-02-16
DE68910498T2 (de) 1994-03-03
TR25266A (tr) 1992-12-04
KR930007549B1 (ko) 1993-08-12
JPH03502018A (ja) 1991-05-09
EP0380658A1 (fr) 1990-08-08
IL90898A (en) 1993-04-04
JPH0664613B2 (ja) 1994-08-22

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