Apparatus, method, and product for downscaling an image

Details Apparatus, method, and product for downscaling an image Apparatus, method, and product for downscaling an image

2006-06-26

2009-06-09

Wu, Xiao M (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Graphic manipulation

C345S606000, C345S660000, C348S448000, C348S458000, C348S581000, C358S525000, C382S260000, C382S298000

Reexamination Certificate

active

07545388

ABSTRACT:
An average filter or filters is used in line with the output of an interpolation filter to downscale an image. The interpolation filter upscales a source image or bitmap of pixels into an intermediate form and the average filter or filters downscales the intermediate form to a destination image or bitmap of pixels. This configuration incorporates a small amount of logic with a relatively low incremental cost, enabling high quality downscaling of text and computer graphics content. The invention achieves quality comparable to a filter/scalar combination with more taps or a separate decimation pass.

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