9849B2
`
`
`
`43
`
`US0076
`
`US 7,639,849 B2
`(10) Patent No.:
`a2) United States Patent
`Kimpeetal.
`(45) Date of Patent:
`Dec. 29, 2009
`
`
`54) METHODS, APPARATUS, AND DEVICES FOR
`NOISE REDUCTION
`BE): Paul
`Gh
`|
`-
`Tom
`Ki
`nventors:
`Tom Kimpe,
`Ghent (BE);
`Pau
`
`Matthijs, Eke (BE)
`
`75)
`
`7/2000 Yamamoto
`6,089,739 A
`9/2000 Greene
`6,115,092 A
`6,154,561 A * 11/2000 Prattetal. woe 382/141
`6,704,008 B2*
`3/2004 Naito etal. esses 345/207
`:
`6.782,137 B1*
`8/2004 Avinash ................... 382/254
`
`73) Assignee: BarcoN.V.,, Kortrijk (BF)
`
`
`2001/0024178 Al
`9/2001 Takeuchi
`2001/0041489 Al
`11/2001 Takeuchi etal.
`
`
`*) Notice:—Subjectto any disclaimer, the termof this 2002/0047568 Al 4/2002 Koyama
`ee 8eeAdnsted under 35
`2002/0154076 Al
`10/2602 Greene
`S.C,
`154(b) by
`ays.
`2004/0174320 Al
`9/2004 Matthijs
`21) Appl. No.: 11/134,522
`
`FOREIGN PATENT DOCUMENTS
`030787170
`11/2003
`EP
`Prior Publication Data
`1424672 Al
`6/2004
`EP
`US 2006/0262147 Al
`Nov. 23, 2006
`
`ou. WO 03/100756 A2=12/2003WO
`
`Related U.S. Application Data
`
`
`
`22)
`
`Filed:
`
`May23, 2005
`
`65)
`
`(60) Provisional application No. 60/681 ,429, filed on May
`17, 2005.
`
`($1)
`
`Int. Cl.
`(2006.01)
`GO6K 9/00
`(2006.01)
`GO9G 5/10
`(52) US. CD. ce eeeeecreeeeeeeeeseene 382/128; 345/690
`(58) Ficld of Classification Search ......... 382/128-134,
`382/189, 214; 600/407, 425; 345/156, 180,
`345/183. 183. 204 619 659. 689. 88. 89
`345/207, 690, 903, 904
`See application file for complete search history.
`References Cited
`U.S. PATENT DOCUMENTS
`5,208,689 A
`5/1993 Hartmann
`5,225,919 A
`7/1993 Nakao
`5,359,342 A * 10/1994 Nakai etal. ccccccccccsecssee- 345/89
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`
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`
`OTHER PUBLICATIONS
`lication N
`Patent Office.
`E
`Search
`report
`for E
`repo
`ce.
`uropean Faten
`Search
`or Luropean application
`02447233.4, dated Apr. 29, 2003 (3 pp.).
`(Continued)
`
`.
`;
`:
`Primary Examiner—Abolfazl Tabatabai
`(74) Aliorney, Ageni, or Firm—HartmanPatents PLLC
`
`INO.
`
`67)
`
`ABSTRACT
`
`Embodiments include applying a compensation to an image
`signal based on nonuniformity of a display device. The com-
`pensation is based on information about variations in light-
`output response among elements of the display device. The
`compensation is also modified based on a characteristic of a
`desired useofthe display.
`
`37 Claims, 16 Drawing Sheets
`
`
`
`
`
`for each ofa plurality of pixels ofa
`display, obtaining a measure of a
`light-output response
`
`T100
`
`T200
`
`>
`
`modifying amap thatis
`
`based on the measures
`
`
`
`obtaining a display signal
`©|based onthe modified map
`
`
`and an image signal
`
`T300
`
`