WO1999048286A3 - Image pick-up apparatus including a correction unit - Google Patents

Image pick-up apparatus including a correction unit Download PDF

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Publication number
WO1999048286A3
WO1999048286A3 PCT/IB1999/000373 IB9900373W WO9948286A3 WO 1999048286 A3 WO1999048286 A3 WO 1999048286A3 IB 9900373 W IB9900373 W IB 9900373W WO 9948286 A3 WO9948286 A3 WO 9948286A3
Authority
WO
WIPO (PCT)
Prior art keywords
electrical charges
image
derive
signal
read out
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.)
Ceased
Application number
PCT/IB1999/000373
Other languages
French (fr)
Other versions
WO1999048286A2 (en
Inventor
Christianus G L M Nederpelt
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.)
Koninklijke Philips NV
Philips AB
Philips Svenska AB
Original Assignee
Koninklijke Philips Electronics NV
Philips AB
Philips Svenska 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 Koninklijke Philips Electronics NV, Philips AB, Philips Svenska AB filed Critical Koninklijke Philips Electronics NV
Priority to JP54676199A priority Critical patent/JP2002509674A/en
Priority to EP99903881A priority patent/EP0983685A2/en
Publication of WO1999048286A2 publication Critical patent/WO1999048286A2/en
Publication of WO1999048286A3 publication Critical patent/WO1999048286A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/36—Temperature of anode; Brightness of image power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information
    • H04N5/32—Transforming X-rays

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

The image pick-up apparatus (1) is provided with an image sensor (2) which includes a plurality of photoelectric elements which convert radiation into electrical charges. A control system (4) is arranged to read out separately electrical charges representing brightness values of the image and electrical charges representing smear. The read-out unit is arranged to derive a correction signal (SC) from the electrical charges representing smear and to derive a primary image signal (PS) from the electrical charges representing brightness values of the image. The correction unit derives a corrected image signal (VS) from the primary image signal and the correction signal. The control system (4) is especially arranged to derive the correction signal from the largest electrical charges from among the electrical charges representing smear, so that only a comparatively small number of electrical charges need be read out so as to obtain the correction signal. Preferably, the electrical charges are read out while radiation is incident on the image sensor so that only a very short period of time is required to read out the image sensor and to derive the corrected image signal.
PCT/IB1999/000373 1998-03-19 1999-03-04 Image pick-up apparatus including a correction unit Ceased WO1999048286A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP54676199A JP2002509674A (en) 1998-03-19 1999-03-04 Image pickup device including correction unit
EP99903881A EP0983685A2 (en) 1998-03-19 1999-03-04 Image pick-up apparatus including a correction unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP98200886.4 1998-03-19
EP98200886 1998-03-19

Publications (2)

Publication Number Publication Date
WO1999048286A2 WO1999048286A2 (en) 1999-09-23
WO1999048286A3 true WO1999048286A3 (en) 1999-12-16

Family

ID=8233491

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1999/000373 Ceased WO1999048286A2 (en) 1998-03-19 1999-03-04 Image pick-up apparatus including a correction unit

Country Status (3)

Country Link
EP (1) EP0983685A2 (en)
JP (1) JP2002509674A (en)
WO (1) WO1999048286A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004110056A1 (en) * 2003-06-05 2004-12-16 Philips Intellectual Property & Standards Gmbh Detector for the detection of x-radiation

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567524A (en) * 1982-08-13 1986-01-28 Rca Corporation Smear reduction in CCD imagers using empty well clocking
EP0232593A2 (en) * 1985-11-15 1987-08-19 Canon Kabushiki Kaisha Photoelectric transducer apparatus
EP0398228A2 (en) * 1989-05-15 1990-11-22 Sanyo Electric Co., Ltd. Solid image pickup apparatus for eliminating smear
EP0748113A2 (en) * 1995-06-05 1996-12-11 Eastman Kodak Company Smear correction of CCD imager using active pixels
WO1997011554A1 (en) * 1995-09-19 1997-03-27 Philips Electronics N.V. Interline ccd sensor arrangement
WO1997023090A2 (en) * 1995-12-18 1997-06-26 Philips Electronics N.V. X-ray examination apparatus including an image sensor matrix with a correction unit
WO1998002021A1 (en) * 1996-07-08 1998-01-15 Philips Electronics N.V. Correction of fixed pattern noise

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567524A (en) * 1982-08-13 1986-01-28 Rca Corporation Smear reduction in CCD imagers using empty well clocking
EP0232593A2 (en) * 1985-11-15 1987-08-19 Canon Kabushiki Kaisha Photoelectric transducer apparatus
EP0398228A2 (en) * 1989-05-15 1990-11-22 Sanyo Electric Co., Ltd. Solid image pickup apparatus for eliminating smear
EP0748113A2 (en) * 1995-06-05 1996-12-11 Eastman Kodak Company Smear correction of CCD imager using active pixels
WO1997011554A1 (en) * 1995-09-19 1997-03-27 Philips Electronics N.V. Interline ccd sensor arrangement
WO1997023090A2 (en) * 1995-12-18 1997-06-26 Philips Electronics N.V. X-ray examination apparatus including an image sensor matrix with a correction unit
WO1998002021A1 (en) * 1996-07-08 1998-01-15 Philips Electronics N.V. Correction of fixed pattern noise

Also Published As

Publication number Publication date
EP0983685A2 (en) 2000-03-08
JP2002509674A (en) 2002-03-26
WO1999048286A2 (en) 1999-09-23

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