Patent
1992-11-18
1995-04-04
Nguyen, Phu K.
G06F 1572, G06F 1562
Patent
active
054044316
ABSTRACT:
A cross point detection part detects respective positions of cross points of an image's edge crossing sides of respective pixels. An approximated area ratio determination part determines respective approximated area ratios obtained as a result of approximating respective area ratios of areas occupied by the image in the respective pixels by using the positions of the cross points. A darkness determination part determines respective darknesses of the respective pixels in accordance with the approximated area ratios.
REFERENCES:
patent: 5123085 (1992-06-01), Wells et al.
patent: 5202960 (1993-04-01), Seiler
patent: 5237650 (1993-08-01), Priem et al.
patent: 5287442 (1994-02-01), Alcorn et al.
"A Comparison of Antialiasing Techniques" article by IEEE CG & A Jan. 1981, pp. 40-48.
Hanyu Yoshiaki
Kumazaki Hitomi
Sato Takashi
Nguyen Phu K.
Ricoh & Company, Ltd.
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