Combination of transition-encoded font information for generatio

Details Combination of transition-encoded font information for generatio Combination of transition-encoded font information for generatio

1987-09-15

1989-08-15

Moore, David K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340703, 340747, 340790, G09G 116

Patent

active

048579041

ABSTRACT:
Transition-encoded font image information is a form of information flagging all pixel displacement locations upon a scan line of a raster scan image generator, nominally a laser printer, whereat black to white, and white to black, transitions occur during generation of the one scan line of a font image. Transition-encoded information for plural, superimposed, font images may be combined prior to generation of a synthesis image. In this combination of transition-encoded information for generating superimposed font images the flags representing transitions must not be overwritten, there being a limit that a single scan line pixel position must either transit black to white, transit white to black, or maintain the state of the previous pixel. The combining of transition encoded information encodes transitions for these one or ones of addresses (pixels) wherein two flags would otherwise overlap so that the total transitions within the combined font information are preserved. This is accomplished by ripple shifting the position(s) of the transition(s) flag(s) within the second font image information which have identical positional correspondence with transition(s) flag(s) within the first font image information so that the flag(s) are slightly relocated within the combined font image information.

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patent: 4616336 (1986-10-01), Robertson et al.
patent: 4656468 (1987-04-01), Takikawa et al.

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