Method and apparatus for rotating and scaling images

Details Method and apparatus for rotating and scaling images Method and apparatus for rotating and scaling images

1994-04-15

1996-10-22

Jankus, Almis R.

395133, 395139, G06T 300

Patent

active

055686001

ABSTRACT:
A method and apparatus, within a computer system, for rotating and scaling an image using a three step process. The amount of image rotation and scaling is user defined. The three step process precisely rotates an input image to rapidly produce an output image. Specifically, the three step process shears each pixel location in the input image along a first axis, then shears and scales the sheared pixel locations along a second axis, and lastly, the sheared and scaled pixel locations are scaled along the first axis to produce an output image that is precisely rotated and scaled relative the input image. The apparatus and method disclosed find applicability in video servers, medical imaging, special effects and animation and location based entertainment systems among other applications.

REFERENCES:
patent: 4283765 (1981-08-01), Rieger
patent: 4759076 (1988-07-01), Tanaka et al.
patent: 4805117 (1989-02-01), Fiore et al.
patent: 4829452 (1989-05-01), Kang et al.
patent: 4908874 (1990-03-01), Gabriel
patent: 5050225 (1991-09-01), Itoh
patent: 5204944 (1993-04-01), Wolberg et al.
patent: 5263136 (1993-11-01), DeAguiar et al.
patent: 5303334 (1994-04-01), Snyder et al.
Wolberg, Digital Image Warping, Computer Society Press, pp. 41-51, 187-189, 204-209 (1990).
E. Catmull, "3-D Transformations of Images in Scanline Order", Association of Computing Machinery (ACM): Proceddings of Siggraph '80, pp. 279-285 (1980).
C. F. R. Weiman, "Continuous Anti-Aliasing Rotation and Zoom of Raster Images", Association of Computing Machinery (ACM): Proceddings of Siggraph '80, pp. 286-293 (1980).
C. Braccini et al., "Fast Geometric Manipulations of Digital Images", Computer Graphics and Image Processing, No. 13, pp. 127-141 (1980).

Affiliated with

Also associated with

Rating

Method and apparatus for rotating and scaling images does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for rotating and scaling images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for rotating and scaling images will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2366319