Data processing apparatus having enlargement/reduction functions

Details Data processing apparatus having enlargement/reduction functions Data processing apparatus having enlargement/reduction functions

1988-01-27

1990-01-09

Harkcom, Gary V.

Boots, shoes, and leggings

358451, 382 44, 382 47, G06F 1520, H04N 104

Patent

active

048932582

ABSTRACT:
A data processing apparatus has a function capable of setting different vertical and horizontal magnifications. Data corresponding to an image input by a scanner is temporarily stored in a page memory. The data stored in the page memory is read out by a central processing unit (CPU), and is enlarged/reduced at predetermined conversion ratios in X and Y directions by an enlarge/reduction circuit. The enlarged/reduced data is temporarily stored in a display memory, and is displayed on a cathode-ray tube (CRT) display by the CPU. When the conversion ratios in the X and Y directions are selected and designated by a keyboard so that the image displayed on the CRT display is enlarged/reduced in at least one of the X and Y directions, the data temporarily stored in the display memory is enlarged/reduced at independent conversion ratios in the X and Y directions by the enlarge/reduction circuit. The data which is enlarged/reduced at independent conversion ratios in the X and Y directions is temporarily stored again in the display memory, and is then displayed on the CRT display by the CPU.

REFERENCES:
patent: 4275450 (1981-06-01), Potter
patent: 4631750 (1986-12-01), Gabriel et al.
patent: 4661987 (1987-04-01), Anderson et al.
patent: 4672464 (1987-06-01), Shida
patent: 4686580 (1987-08-01), Kato et al.
patent: 4771473 (1988-09-01), Sugiura

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