FR2924513B1 - METHOD FOR PROCESSING A DEFOCUSED DIGITAL IMAGE AND CORRESPONDING DEVICE - Google Patents

METHOD FOR PROCESSING A DEFOCUSED DIGITAL IMAGE AND CORRESPONDING DEVICE

Info

Publication number
FR2924513B1
FR2924513B1 FR0708458A FR0708458A FR2924513B1 FR 2924513 B1 FR2924513 B1 FR 2924513B1 FR 0708458 A FR0708458 A FR 0708458A FR 0708458 A FR0708458 A FR 0708458A FR 2924513 B1 FR2924513 B1 FR 2924513B1
Authority
FR
France
Prior art keywords
defocused
digital image
processing
corresponding device
image
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.)
Active
Application number
FR0708458A
Other languages
French (fr)
Other versions
FR2924513A1 (en
Inventor
Rodolphe Cottron
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.)
Thales SA
Original Assignee
Thales SA
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 Thales SA filed Critical Thales SA
Priority to FR0708458A priority Critical patent/FR2924513B1/en
Publication of FR2924513A1 publication Critical patent/FR2924513A1/en
Application granted granted Critical
Publication of FR2924513B1 publication Critical patent/FR2924513B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • G01S13/904—SAR modes
    • G01S13/9041—Squint mode
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/90—Determination of colour characteristics

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Image Analysis (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

L'invention propose un procédé de traitement d'une image numérique défocalisée, obtenue par l'éclairement d'une zone (ZN) pendant un temps donné (Te), comprenant une détermination (5) de l'erreur de phase de ladite image numérique défocalisée, ladite détermination comprenant :- une formation (51 ) à partir de ladite image numérique défocalisée, de N imagettes, N étant un entier, chaque imagette ayant une résolution N fois inférieure à celle de l'image numérique une fois traitée, et- un calcul (55) de ladite erreur de phase de l'image numérique défocalisée.Le nombre N d'imagettes formées est fonction de la résolution de ladite image numérique défocalisée.The invention proposes a method of processing a defocused digital image, obtained by the illumination of an area (ZN) for a given time (Te), comprising a determination (5) of the phase error of said image. defocused digital, said determination comprising: - a formation (51) from said defocused digital image, of N images, N being an integer, each image having a resolution N times lower than that of the digital image once processed, and - a calculation (55) of said phase error of the defocused digital image. The number N of images formed is a function of the resolution of said defocused digital image.

FR0708458A 2007-12-04 2007-12-04 METHOD FOR PROCESSING A DEFOCUSED DIGITAL IMAGE AND CORRESPONDING DEVICE Active FR2924513B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0708458A FR2924513B1 (en) 2007-12-04 2007-12-04 METHOD FOR PROCESSING A DEFOCUSED DIGITAL IMAGE AND CORRESPONDING DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0708458A FR2924513B1 (en) 2007-12-04 2007-12-04 METHOD FOR PROCESSING A DEFOCUSED DIGITAL IMAGE AND CORRESPONDING DEVICE

Publications (2)

Publication Number Publication Date
FR2924513A1 FR2924513A1 (en) 2009-06-05
FR2924513B1 true FR2924513B1 (en) 2010-01-15

Family

ID=39650917

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0708458A Active FR2924513B1 (en) 2007-12-04 2007-12-04 METHOD FOR PROCESSING A DEFOCUSED DIGITAL IMAGE AND CORRESPONDING DEVICE

Country Status (1)

Country Link
FR (1) FR2924513B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2960300B1 (en) 2010-05-18 2014-01-03 Thales Sa METHOD FOR CONSTRUCTING FOCUSED RADAR IMAGES

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4771287A (en) * 1983-06-23 1988-09-13 Westinghouse Electric Corp. Method of correcting for errors in radar imaging
US6255981B1 (en) * 1999-08-04 2001-07-03 Raytheon Company Method for range alignment and rotation correction of a high resolution image in an inverse synthetic aperture radar system
US7145498B2 (en) * 2004-11-23 2006-12-05 Raytheon Company Efficient autofocus method for swath SAR

Also Published As

Publication number Publication date
FR2924513A1 (en) 2009-06-05

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