Apparatus and method for creating video images including soft-ed

Details Apparatus and method for creating video images including soft-ed Apparatus and method for creating video images including soft-ed

1993-10-18

1995-04-18

Powell, Mark R.

G06F 1572

Patent

active

054085934

ABSTRACT:
Soft-edge processing of a video color image is effected in accordance with a stylus nib pressure. Initially, a display circle unit is determined having center coordinance corresponding to display coordinance of a stylus and having a radius corresponding to a nib pressure of the nib stylus. A display region is set encompassing the display circle unit, the display region having a plurality of pixels. A distance from each pixel located outside the circle unit within the display region to the circle unit is determined. This distance is then used as the basis for determining a Z value of the pixel which is indicative of the relative illumination of the pixel to effect soft-edge processing of the image.

REFERENCES:
patent: 4772763 (1988-09-01), Garwin et al.
patent: 4796020 (1989-01-01), Zigmantas et al.
patent: 5038223 (1991-08-01), Yamada
patent: 5134688 (1992-07-01), Corthout
patent: 5175625 (1992-12-01), Miles

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