Apparatus and method for non-uniform image scaling

Details Apparatus and method for non-uniform image scaling Apparatus and method for non-uniform image scaling

1997-08-01

2000-01-18

Luu, Matthew

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

G06T 1100

Patent

active

060161523

ABSTRACT:
A source image may be manipulated by a computer to include special graphics effects. The source image may be used for still pictures or motion video applications and may include a single image or a sequence of images. The special graphics effects applied to the source image to create a desired destination image include various non-uniform scaling or arbitrary distortion functions. The effect has a corresponding affine transformation that approximates the non-uniform scaling function. This affine transformation is used to define an ellipse in the source image. A linear transformation from a unit circle in the source image to the ellipse in the source image is calculated. The linear transformation is used to modify a reconstruction filter in the source image. A pixel value in the destination image is determined by identifying pixels included in a support of the modified reconstruction filter in the source image in order to reduce artifacts in non-uniform scaling applications.

REFERENCES:
patent: 4602286 (1986-07-01), Kellar et al.
patent: 4698666 (1987-10-01), Lake, Jr. et al.
patent: 4752828 (1988-06-01), Chapuis et al.
patent: 5153937 (1992-10-01), Wobermin et al.
patent: 5179641 (1993-01-01), Comins et al.
patent: 5204944 (1993-04-01), Wolberg et al.
patent: 5241372 (1993-08-01), Ohba
patent: 5333245 (1994-07-01), Vecchione
patent: 5339387 (1994-08-01), Frankel
patent: 5392385 (1995-02-01), Evangelisti et al.
patent: 5420971 (1995-05-01), Westerink et al.
patent: 5438651 (1995-08-01), Suzuki et al.
patent: 5479590 (1995-12-01), Lin
patent: 5557339 (1996-09-01), Dadourian
patent: 5581665 (1996-12-01), Sugiura et al.
patent: 5592599 (1997-01-01), Lindholm
patent: 5596687 (1997-01-01), Peters, Jr.
patent: 5644364 (1997-07-01), Kurtze et al.
patent: 5710876 (1998-01-01), Peercy et al.
patent: 5715385 (1998-02-01), Stearns et al.
patent: 5754180 (1998-05-01), Kivolowitz et al.
patent: 5774132 (1998-06-01), Uchiyama
patent: 5808623 (1998-09-01), Hamburg
patent: 5835099 (1998-11-01), Maromont
patent: 5867166 (1999-02-01), Myhrvold et al.
T. Kohonen, Content-Addressable Memories, Date Unknown, pp. 19-27, Springer Series in Information Sciences, Second Edition.
D. Ghazanfarpour and B. Peroche, A High-Quality Filtering Using Forward Texture Mapping, 1991, pp. 569-577, Comput. & Graphics vol. 15, No. 4.
John Buchanan, The Filtering of 3D Textures, 1991, pp. 53-60, Graphics Interface.
Ghazanfarpour et al., "A High-Quality Filtering Using Forward Texture Mapping", Computers and Graphics, pp. 569-577, Jan. 1, 1991.
Feibush et al., Synthetic Texturing Using Digital Filters, Computer Graphics 1980, pp. 294-301.
Oka et al., Real-Time Manipulation of Texture-Mapped Surfaces, Computer Graphics, vol. 21, No. 4, Jul. 1987, pp. 181-188.
Blinn et al., Texture and Reflection in Computer Generated Images, Communications of the ACM, Oct. 1976, vol. 19, No. 10, pp. 542-547.
Catmull et al., 3-D Transformations of Images in Scanline Order, Computer Graphics, 1980, pp. 279-285.
Franklin C. Crow, Summed-Area Tables for Texture Mapping, Computer Graphics 1984, pp. 207-212.
Gangnet et al., Perspective Mapping of Planar Textures, Computers and Graphics, vol. 8, No. 2, 1984, pp. 115-123.
Andrew Glassner, Adaptive Precision in Texture Mapping, Computer Graphics, Dallas, Aug. 18-vol. 20, No. 4, 1986, pp. 297-306.
Paul S. Heckbert, Filtering by Repeated Integration, Computer Graphics, Dallas, Aug. 18-22, vol. 20, No. 4, 1986, pp. 315-321.
Alvy Ray Smith, Planar 2-Pass Texture Mapping and Warping, Computer Graphics, vol. 21, No. 4, Jul. 1987, pp. 263-272.
Lance Williams, Pyramidal Parametrics, Computer Graphics, vol. 17, No. 3, Jul. 1993, pp. 1-11.

Affiliated with

Also associated with

Rating

Apparatus and method for non-uniform image scaling does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for non-uniform image scaling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for non-uniform image scaling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-566256