Digital image processor including correction for undesirable edg

Details Digital image processor including correction for undesirable edg Digital image processor including correction for undesirable edg

1993-03-16

1994-05-31

Harkcom, Gary V.

395128, G06F 700

Patent

active

053176790

ABSTRACT:
A digital image processor generates a digital signal responsive to an image signal representing a predetermined font demarcated by an outline, by which digital signal a digital image corresponding to the predetermined font is expressed on picture elements by using the luminance of each picture element, the digital image processor using a matrix having matrix elements corresponding to the picture elements, on which matrix the predetermined font can be expressed. The digital image processor digitalizes the image signal to determine the luminance of each picture element by using the matrix and an antialiasing process. The digital image processor compares first luminance of a first matrix element traversing the outline of the predetermined font with second luminance of a second matrix element completely inside the outline of the predetermined font and third luminance of a third matrix element outside the predetermined font, and corrects the first luminance, if the first luminance is the highest among the first, second and third luminance, so that the first luminance is not the highest among the first, second and third luminance.

REFERENCES:
patent: 4607340 (1986-08-01), Nagai
patent: 4992780 (1991-02-01), Penna et al.
patent: 5029108 (1991-07-01), Lung
"Pixel-Scan-Line Conversion (2) Concerning Polygons," The Information Center, No. 16, Jan. 1984, pp. 136-141.
"The Journal of the Institute of Image Electronics Engineers of Japan," vol. 18, No. 3, Jun. 1989, pp. 92-165.
"Practice Computer Graphics Basis and Application," Fujio Yamaguchi, pp. 114-125.

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