Method of and apparatus for converting format of an image having

Details Method of and apparatus for converting format of an image having Method of and apparatus for converting format of an image having

1994-11-07

1996-12-03

Nguyen, Phu K.

G06F 1500

Patent

active

055816754

ABSTRACT:
An image approximate to a vignette is to be generated from image data representing a first set of color steps CS1. A second set of color steps CS2 is first created from the first set of color steps CS1, where the second set of color steps CS2 has a plurality of figures inserted at equal intervals between two end figures of the first set of color steps CS1. Binary noise data BS are then generated in the vicinity of the boundary of each figure of the second color steps. Vignette image data VID approximately representing a vignette is generated by adding the binary noise data BS to bit map data of the second set of color steps CS2. Accordingly, a tone jump is eliminated from the image approximate to a vignette.

REFERENCES:
patent: 4694405 (1987-09-01), Bradbury et al.

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