Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-01-22
1992-12-29
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 22, 340723, 395100, H04N 5262
Patent
active
051756250
ABSTRACT:
A system for creating video images by `drawing` on a touch tablet with a stylus. Addresses designated by the stylus are translated by a computer (16) into addresses in a frame delay store (13). The operator may choose an artists implement, the effect of which is simulated in the image by brush stamp signals representing the distribution power of the implement. Brush stamp signals are provided for a patch of signals round a designated address. During a frame period the brush stamp signals are processed to produce signals representing the effect of overlapping brush stamps for a portion of a line drawn in that period. The store is a frame delay store where the stored signals are continuously recycled. During a cycle of the store signals corresponding to the addresses covered by the brush stamps are sequentially up-dated by combining with incoming video signals in proportions determined by the brush signals. This produces the effect on a screen of a line drawn with the chosen implement.
REFERENCES:
patent: 4371893 (1983-02-01), Rabeisen
patent: 4439783 (1984-03-01), Nishikawa
Chin Tommy P.
Quantel Limited
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