Method and apparatus for scaling images having a plurality of sc

Details Method and apparatus for scaling images having a plurality of sc Method and apparatus for scaling images having a plurality of sc

1997-08-29

1998-08-11

Feild, Joseph H.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

345428, 382298, G06T 340

Patent

active

057933790

ABSTRACT:
A method of processing a digital input image having a plurality of scan lines of pixel data into an interpolated digital output image by interpolating the pixel data in each scan line of the digital input image and replicating the pixel data in the slow scan direction to provide a plurality of scan lines interpolated in the fast scan direction, calculating slow scan direction interpolation coefficients for scan lines to be interpolated in the interpolated output image, storing the interpolated scan lines using the storage typically used for the display image, interpolating selected scan lines which have been stored using selected existing scan lines to produce scan lines interpolated in the slow scan direction of the interpolated output image, and writing scan lines interpolated in the slow scan direction in place of scan lines selected for interpolation in the output image.

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G. Wolberg, "Digital Image Warping," IEEE Computer Society Press, 1992, pp. 159-160.
Tabata et al., "High Speed Image Scaling For Integrated Document Management," 2nd ACM-SIGOA Conf. on Office Info. Jun. 1984.

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