Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2005-05-17
2005-05-17
Bella, Matthew C. (Department: 2676)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C382S275000, C358S003130
Reexamination Certificate
active
06894698
ABSTRACT:
A dithering system comprising a dithering unit, a storage medium, and an averaging unit. The dithering unit is configured to receive a set of data values, to add dither values to the data values, and to truncate the resultant addition values to L-bit truncated values. The storage medium is configured to store the L-bit truncated values. The averaging unit is configured to read the L-bit truncated values from the storage medium, and to compute an average value using at least a subset of the L-bit truncated values. The dither values may have an average value of approximately one-half. The dither values may approximate a uniform distribution of numbers between −A+½ and A+½, wherein A is greater than or equal to one. Alternatively, the dithering unit may receive a temporal stream of data values, and the average unit may perform a temporal average (e.g. an FIR filter). The dithering system may be incorporated in a graphics system. In this case, data values may represent rendered sample values (e.g. color or alpha).
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Deering Michael F.
Naegle N. David
Nelson Scott R.
Bella Matthew C.
Blackman Anthony J
Brightwell Mark K.
Hood Jeffrey C.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
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