Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1986-05-05
1989-01-03
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340728, 340748, G09G 116
Patent
active
047960167
ABSTRACT:
A pixel rounding method and circuit for bit-map graphics displays. The pixel codes are divided into two groups "high" and "low", and pixels with "high" groups codes are rounded against pixels with "low" group codes. The rounding can be prerounding or postrounding and involves extending a rounded pixel partway into the adjacent (preceding or succeeding) pixel position. Rounding decisions are made by detecting diagonal relationships of "high" and "low" group codes in blocks in four pixel codes. A rounding circuit receives a pixel code stream and produces a version thereof which is delayed by one pixel period. In accordance with the rounding decisions, the original and delayed pixel code streams are selectively switched each half pixel period to provide a resultant pixel code stream which is used to generate the display.
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Curtis Marshall M.
Fatahi-Yar Mahmoud
Rich Marianne R.
U.S. Philips Corporation
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