Method and apparatus for displaying a high resolution image on a

Details Method and apparatus for displaying a high resolution image on a Method and apparatus for displaying a high resolution image on a

1989-05-11

1990-05-08

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

340793, G06K 946

Patent

active

049245228

ABSTRACT:
A method and apparatus for displaying a high resolution image on a low resolution CRT with a minimal loss of information. Even rows of a source or matrix of binary pixels are stored in an "even" video RAM and odd rows are stored in an "odd" video RAM at addresses corresponding to the locations of the binary pixels within the matrix. In a preferred embodiment, a group of four pixels corresponding to a portion of the image is converted to a single gray value which is used to control the intensity of the beam control within the CRT.

REFERENCES:
patent: 4134133 (1979-01-01), Teramura et al.
patent: 4150400 (1979-04-01), Wong
patent: 4399435 (1983-08-01), Urabe
patent: 4468809 (1984-08-01), Grabowski et al.
patent: 4486785 (1984-12-01), Lasher et al.
patent: 4628534 (1986-12-01), Marshall
patent: 4736239 (1988-04-01), Sprague et al.

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