GB2495269B - Real-time solar observations - Google Patents

Real-time solar observations

Info

Publication number
GB2495269B
GB2495269B GB1113964.9A GB201113964A GB2495269B GB 2495269 B GB2495269 B GB 2495269B GB 201113964 A GB201113964 A GB 201113964A GB 2495269 B GB2495269 B GB 2495269B
Authority
GB
United Kingdom
Prior art keywords
sun
camera
horizon
finish
image data
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.)
Expired - Fee Related
Application number
GB1113964.9A
Other versions
GB201113964D0 (en
GB2495269A (en
Inventor
Lolwa Ali Sultan Al-Maadid
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.)
Qatar Foundation
Original Assignee
Qatar Foundation
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 Qatar Foundation filed Critical Qatar Foundation
Priority to GB1113964.9A priority Critical patent/GB2495269B/en
Publication of GB201113964D0 publication Critical patent/GB201113964D0/en
Publication of GB2495269A publication Critical patent/GB2495269A/en
Application granted granted Critical
Publication of GB2495269B publication Critical patent/GB2495269B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/97—Determining parameters from multiple pictures
    • 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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B49/00—Time-pieces using the position of the sun, moon or stars
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G15/00—Time-pieces comprising means to be operated at preselected times or after preselected time intervals
    • G04G15/006—Time-pieces comprising means to be operated at preselected times or after preselected time intervals for operating at a number of different times
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/70—Determining position or orientation of objects or cameras
    • G06T7/73—Determining position or orientation of objects or cameras using feature-based methods

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Image Analysis (AREA)

Abstract

A real-time solar observation system for Muslims comprises a camera (36) detecting sunlight (38) to produce image data, a camera (40) producing image data relating to a shadow cast by a vertical pole (42), and a processor (30) receiving image data from camera (36) and camera (40) and determining sunrise start (when the sun first appears) and finish (when the sun is first completely above the horizon), midday start (when the sun is at its zenith and the shadow is at its shortest) and finish (when the shadow has lengthened by the length of the pole), and sunset start (when the sun first starts to go below the horizon) and finish (when the sun is completely below the horizon). Three cameras may be used, or a single camera which is moved. If it is too cloudy, stored information may be used instead. Several systems may be networked. Audible or visible alarms may be given to a user, or he may be sent a cellular telephone message which activates a call to prayer, followed by another message when prayer may cease.
GB1113964.9A 2011-08-15 2011-08-15 Real-time solar observations Expired - Fee Related GB2495269B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1113964.9A GB2495269B (en) 2011-08-15 2011-08-15 Real-time solar observations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1113964.9A GB2495269B (en) 2011-08-15 2011-08-15 Real-time solar observations

Publications (3)

Publication Number Publication Date
GB201113964D0 GB201113964D0 (en) 2011-09-28
GB2495269A GB2495269A (en) 2013-04-10
GB2495269B true GB2495269B (en) 2014-02-05

Family

ID=44764455

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1113964.9A Expired - Fee Related GB2495269B (en) 2011-08-15 2011-08-15 Real-time solar observations

Country Status (1)

Country Link
GB (1) GB2495269B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104778469B (en) * 2015-03-04 2020-04-10 中国科学院国家天文台 Automatic extraction method of sun outline

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004334042A (en) * 2003-05-09 2004-11-25 Sumitomo Electric Ind Ltd Exposure control method and apparatus for camera type vehicle detector
DE102006004498A1 (en) * 2006-02-01 2007-08-09 Heller, Carlo, Dr.-Ing. Circular sun dial for displaying e.g. real local time, has display device rotatable around pole axis, where dial is aligned by rotation around zenith axis for sun such that image is produced by sun light that falls on display device
CN101493322A (en) * 2009-02-04 2009-07-29 天津大学 Latitude and longitude estimation method based on sun shadow track in video
DE102008010844A1 (en) * 2008-02-25 2009-08-27 Mohamed El-Habib Rahal Manual direction finder for locating e.g. elliptic plane, has video camera positioned at semicircular edge of ecliptic plane and continuously shooting western sky with ecliptic appearing as line
EP2154630A1 (en) * 2008-08-13 2010-02-17 NTT DoCoMo, Inc. Image identification method and imaging apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004334042A (en) * 2003-05-09 2004-11-25 Sumitomo Electric Ind Ltd Exposure control method and apparatus for camera type vehicle detector
DE102006004498A1 (en) * 2006-02-01 2007-08-09 Heller, Carlo, Dr.-Ing. Circular sun dial for displaying e.g. real local time, has display device rotatable around pole axis, where dial is aligned by rotation around zenith axis for sun such that image is produced by sun light that falls on display device
DE102008010844A1 (en) * 2008-02-25 2009-08-27 Mohamed El-Habib Rahal Manual direction finder for locating e.g. elliptic plane, has video camera positioned at semicircular edge of ecliptic plane and continuously shooting western sky with ecliptic appearing as line
EP2154630A1 (en) * 2008-08-13 2010-02-17 NTT DoCoMo, Inc. Image identification method and imaging apparatus
CN101493322A (en) * 2009-02-04 2009-07-29 天津大学 Latitude and longitude estimation method based on sun shadow track in video

Also Published As

Publication number Publication date
GB201113964D0 (en) 2011-09-28
GB2495269A (en) 2013-04-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20200815