Video signal processing

Details Video signal processing Video signal processing

1986-05-06

1987-07-21

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358104, 358107, 364522, 340729, H04N 1300, H04N 718

Patent

active

046822178

ABSTRACT:
A method of and apparatus for processing video signals to achieve a visual effect corresponding to that which would be achieved if an input two-dimensional image were projected on to a three-dimensional surface is disclosed. A video signal is formed into digitized sample values each having an input pixel address comprising X and Y coordinate values. X and Y scaling multipliers and Z coordinate values corresponding to the respective pixel addresses on the three-dimensional surface to which each of the input pixel addresses will be moved in achieving the effect are stored in a mapping store. Multipliers multiply the X and Y coordinate values of each input pixel address by the corresponding X and Y scaling multipliers, and the resulting scaled X and Y coordinate values and the associated Z coordinate values are supplied to a perspective transformation device to derive the output X and Y coordinate values corresponding to the effect.

REFERENCES:
patent: 3261912 (1966-07-01), Hemstreet
patent: 3602702 (1971-08-01), Warnock
patent: 4414565 (1983-11-01), Shanks
patent: 4489389 (1984-12-01), Beckwith et al.
J. Blinn et al.; "Texture and Reflection in Computer Generated Images"; Tutorial Computer Graphic--IEEE Computer Society; 1979; pp. 362-367.

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