| 摘要 |
A system and method for generating a variably scaled digital image. A second digital image containing a second plurality of pels is generated from first digital image containing a first plurality of pels. The first digital image may be stored in an image buffer. Each of the first plurality of pels is input serially into a process whereby a first and a second scaling factor are applied to the luminance values associated with a pel. A determination is made as to whether or not the scaled luminance values overflow vertically and horizontally into surrounding pels in the second plurality of pels. If the scaled luminance values overflow vertically, the overflow is stored in a line buffer to be added to future scaled luminance values. If the scaled luminance values overflow horizontally, the overflow is accumulated in an accumulator to be added to future scaled luminance values. Once a pel in the second plurality of pels is completely filled with luminance values, the pel is output to a buffer and is ready to be displayed.
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