High speed image drawing method and apparatus therefor

Details High speed image drawing method and apparatus therefor High speed image drawing method and apparatus therefor

1986-02-10

1988-04-05

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340744, 340723, 340728, 364719, 364720, G09G 114

Patent

active

047362014

ABSTRACT:
The tangent .alpha. of the tangential line of an image to be drawn at each point in an orthogonal X-Y coordinate system is classified into two angle regions, a first angle region, where a condition -1.ltoreq..alpha.<1 is fulfilled, and a second angle region, where a condition .alpha.<-1 or 1.ltoreq..alpha. is fulfilled. The first and the second angle region is represented by the direction parallel to the X-axis and the direction parallel to the Y-axis, respectively. When the image to be drawn is displayed on a display screen, in the image to be drawn, the parts belonging to the first angle region are drawn with a plurality of segments, each of which is parallel to the X-axis, and the parts blonging to the second angle region are drawn with a plurality of segments, each of which is parallel to the Y-axis. That is, the image to be drawn is displayed on the display screen by using only segments parallel to the X-axis and those parallel to the Y-axis.

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patent: 4458330 (1984-07-01), Imsand et al.
"An Improved Algorithm for the Generation of Nonparametric Curves", IEEE Transactions on Computers, vol. C-22, #12, Dec. 1973, Jordan, Jr. et al.

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