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US006552731B1
(12) United States Patent ao) Patent No.: us 6,552,731 Bi
Gonsalves (45) Date of Patent: Apr. 22,2003
(54) MULTI-TONE REPRESENTATION OF A DIGITAL IMAGE ON A DIGITAL NONLINEAR EDITING SYSTEM
(75) Inventor: Robert Gonsalves, Wellesley, MA (US)
(73) Assignee: Avid Technology, Inc., Tewksbury, MA (US)
( * ) Notice: Subject to any disclaimer, the term ol this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/293,732
(22) Filed: Apr. 16, 1999
(51) Int. CI.7 G09G 5/02; G06K 9/00;
G06K 9/40; B41B 1/00; G03F 3/08
(52) U.S. CI 345/589; 382/169; 382/274;
358/1.9; 358/520
(58) Field of Search 345/581, 589,
345/591, 593, 594, 595, 690, 602; 358/1.9,
520, 521, 518, 519; 382/167, 174, 274,
162, 169; 386/44; 348/631, 663, 674, 673,
687, 251, 396, 254, 453, 576, 577, 649,
650, 651
(56) References Cited
U.S. PATENT DOCUMENTS
![[table]](http://www.google.fr/patents?id=npQOAAAAEBAJ&hl=fr&ie=ISO-8859-1&output=text&pg=PA1&img=1&zoom=3&hl=fr&q=&cds=1&sig=ACfU3U3Ssxr2spYLzSgCqHEO9-_9rOhNbw&edge=0&edge=stretch&ci=112,743,355,265)
![[blocks in formation]](http://www.google.fr/patents?id=npQOAAAAEBAJ&hl=fr&ie=ISO-8859-1&output=text&pg=PA1&img=1&zoom=3&hl=fr&q=&cds=1&sig=ACfU3U3Ssxr2spYLzSgCqHEO9-_9rOhNbw&edge=0&edge=stretch&ci=494,164,421,587)
A system and method for generating a multi-tone representation ol a digital image by applying a plurality ol functions of luma to the digital image. The functions of luma comprise at least a first function and a second function, where each function has a value for each luma value in a range of luma values. Each function also has an associated display value. The digital image includes a plurality of pixels, where for each pixel, it is determined which of the first and second functions has a maximum value for a luma value of the pixel. Each pixel is represented using the display value associated with the determined function.
3 Claims, 6 Drawing Sheets
![[table]](http://www.google.fr/patents?id=npQOAAAAEBAJ&hl=fr&ie=ISO-8859-1&output=text&pg=PA2&img=1&zoom=3&hl=fr&q=&cds=1&sig=ACfU3U2-biOjGcZT0ABe_XDuanAp5wEjew&edge=0&edge=stretch&ci=112,211,355,1064)
![[table][merged small][merged small][table]](http://www.google.fr/patents?id=npQOAAAAEBAJ&hl=fr&ie=ISO-8859-1&output=text&pg=PA2&img=1&zoom=3&hl=fr&q=&cds=1&sig=ACfU3U2-biOjGcZT0ABe_XDuanAp5wEjew&edge=0&edge=stretch&ci=488,156,427,499)
OTHER PUBLICATIONS
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Ohanian, Thomas A., "Digital Nonlinear Editing; New Approaches to Editing Film and Video", 1993, pp. 103-153. U.S. patent application Ser. No. 09/293,590, Cacciatore et al, filed Apr. 16, 1999.
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* cited by examiner
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