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Title: US7418156: Domain of definition in warper/morpher
[ Derwent Title ]


Country: US United States of America

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Inventor: Candela, Dan; Beverly Hills, CA, United States of America
Middler, Mitch; Hermosa Beach, CA, United States of America
Brinkmann, Ron; Hermosa Beach, CA, United States of America
Wolberg, George; Woodmere, NY, United States of America

Assignee: Apple Inc., Cupertino, CA, United States of America
other patents from APPLE COMPUTER, INC. (32940) (approx. 1,718)
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Published / Filed: 2008-08-26 / 2004-04-16

Application Number: US2004000825847

IPC Code: Advanced: G06K 9/36;
Core: more...

ECLA Code: G06T15/70; G06T13/00B;

U.S. Class: 382/276; 382/241; 382/302; 704/215;

Field of Search: 382/106,117,289,291,190,100,169,176,209,236,243,248,250,302 345/345,622,629,589-591 348/416,745-747,807,416.1 764/203,269

Priority Number:
2004-04-16  US2004000825847

Abstract:     An efficient way to perform rendering operations in an image processing environment includes a warping engine having a warping module and a domain of definition (DOD) module. When an object is warped, a new DOD for the image is determined by the warping engine by comparing the location of certain pixels in the warped image with their corresponding locations in the original image. By maintaining a DOD for the warped images, only that portion of the DOD that intersects with a region of interest is computed, thus resulting in optimized performance.

Attorney, Agent or Firm: Fenwick & West LLP ;

Primary / Asst. Examiners: Ahmed, Samir A.; Rashidian, Mehdi

INPADOC Legal Status: Show legal status actions

Family: None

First Claim:
Show all 21 claims
    1. A method for determining a domain of definition (DOD) in a warped image, the warped image formed from an original image, each pixel of the warped image having a displacement from a corresponding pixel in the original image, the original image unrestricted by a border, the method comprising:

determining an original DOD associated with the original image, the original DOD comprising a region of the original image with a boundary surrounding useful information, the boundary having a plurality of edges corresponding to a plurality of directions;

for each pixel located on the plurality of edges of the original DOD:

determining a location of a corresponding pixel in the warped image; and

determining a displacement of the pixel in the warped image from its corresponding pixel in the original image;

for each of the plurality of edges, determining a maximal displacement value of a pixel on the edge in the direction corresponding to the edge; and

determining a new DOD for the warped image, the new DOD for the warped image corresponding to a DOD in the original image, each edge of the new DOD displaced in the direction and by the determined maximal displacement value corresponding to the edge of the original DOD.



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U.S. References: Go to Result Set: All U.S. references   |  No patents reference this one   |   Backward references (4)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Buy PDF- 10pp US5067014  1991-11 Bergen et al.  David Sarnoff Research Center, Inc. Three-frame technique for analyzing two motions in successive image frames dynamically
Buy PDF- 13pp US5175808  1992-12 Sayre  Pixar Method and apparatus for non-affine image warping
Buy PDF- 49pp US5204944  1993-04 Wolberg et al.  The Trustees of Columbia University in the City of New York Separable image warping methods and systems using spatial lookup tables
Buy PDF- 49pp US5321770  1994-06 Huttenlocher et al.  Xerox Corporation Method for determining boundaries of words in text
       
Foreign References: None

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