Method for generating a video image comprising a geometrical fig

Details Method for generating a video image comprising a geometrical fig Method for generating a video image comprising a geometrical fig

1984-05-07

1986-11-11

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, 358185, 364715, H04N 5262

Patent

active

046225889

ABSTRACT:
A generator for generating shapes derived from a square comprises a memory for storing the values of the function .vertline.X.vertline. and a memory for storing the values of the function .vertline.Y.vertline., an adder for delivering a value M=.vertline.X.vertline.+.vertline.Y.vertline., and a memory for delivering control signals to a video switcher as a function of the value of M. In the case of points located inside a square corresponding to the equation .vertline.X.vertline.+.vertline.Y.vertline.=K, the value of M is smaller than K. The address values X and Y are computed as a function of the coordinates of the point considered in the image to be generated and as a function of the geometrical transformations to be made in the figure in order to vary its shape and its position.

REFERENCES:
patent: 3821468 (1974-06-01), Busch
patent: 4432009 (1984-02-01), Reitmeier
Digital Circle-Pattern Generator for TV, by P. Lappalainen, IEEE Transactions on Broadcasting, vol. BC-19, No. 3, Dept. 1973, pp. 63-67.

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