Pattern generation using wipe solid generator

Details Pattern generation using wipe solid generator Pattern generation using wipe solid generator

1992-10-30

1994-02-01

Groody, James J.

Television

Image signal processing circuitry specific to television

Special effects

348595, H04N 5262

Patent

active

052836525

ABSTRACT:
A method of pattern generation for a screen using a wipe solid generator and a recursive memory includes generating from operator inputs a wipe solid. An extent of the generated wipe solid is measured to produce maximum and minimum values. These maximum and minimum values are extended to encompass a desired border size and softness. A lever-arm scaling function is selected based upon whether a change in operator input causes a reversal in pattern and/or causes the pattern to "breathe." The selected lever-arm scaling function uses prior values from the recursive memory to generate new values that are stored in the recursive memory. From the stored values clip levels are determined such that completion of lever-arm movement to a limit position coincides with completion of the pattern without distortion of the size of the pattern.

REFERENCES:
patent: 4805022 (1989-02-01), Abt
patent: 4974083 (1990-11-01), Bloomfield et al.
patent: 5046030 (1991-09-01), Bitter et al.
patent: 5153711 (1992-10-01), DesJardins

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