Image alias rejection using shaped statistical filtering

Details Image alias rejection using shaped statistical filtering Image alias rejection using shaped statistical filtering

2007-09-11

2007-09-11

Tung, Kee M. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

C345S094000, C345S208000, C345S596000, C345S599000, C382S205000, C382S207000, C382S228000, C382S275000, C702S066000, C702S067000, C702S068000, C702S069000, C702S072000, C702S073000, C702S074000, C702S081000

Reexamination Certificate

active

09992060

ABSTRACT:
Image alias rejection when converting a high resolution rasterized waveform to a lower resolution rasterized waveform for display uses a statistical filter. The statistical filter provides a shaped probability density function either by combining the outputs of multiple random number generators, such as linear feedback shift registers, or by using a corresponding look-up table to produce a dither signal. The statistical filter may be applied to one or both of the dimensional values for each data point of the high resolution rasterized waveform by combining the dimensional values with the dither signal. The resulting filtered dimensional values may then be subsampled, such as by truncation, to produce values for a lower resolution rasterized waveform display.

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Steven W. Smith “The Scientist and Engineer's Guide to Digital Signal Processing” Second Edition, 1999, p. 30-31, California Technical Publishing, San Diego, CA 92150.

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