Method and apparatus for scaling graphic images

Details Method and apparatus for scaling graphic images Method and apparatus for scaling graphic images

1997-03-20

1999-09-07

Zimmerman, Mark K.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

345131, 345136, 382300, 395102, 348581, 358447, G06T 340

Patent

active

059494344

ABSTRACT:
An innovative technique for minimizing the visual artifacts created by scaling an image is disclosed. More particularly, a factor that adds a degree of pseudo-randomness to the location of values generated as output during the scaling process is incorporated in one embodiment, the initial value of the error term used to generate the series is set on a semi-random basis such that the output pixels generated are offset from one another on different rows or columns of the image. Thus, any banding artifacts which are created using the prior art process will be minimized due to the shifting of pixels.

REFERENCES:
patent: 4490797 (1984-12-01), Staggs
patent: 5107346 (1992-04-01), Bowers et al.
patent: 5113455 (1992-05-01), Scott
patent: 5778158 (1998-07-01), Fujii et al.
patent: 5835687 (1998-11-01), Brown et al.

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