Image drawing apparatus

Details Image drawing apparatus Image drawing apparatus

1993-10-19

1995-02-07

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

345 17, 345130, 395139, 382 47, G06K 900

Patent

active

053881664

ABSTRACT:
An image drawing apparatus wherein the processing time and the memory capacity are reduced and jaggy is reduced to improve the image quality. A command received at an image data inputting section is sent to a vector production section, in which, when the command is a font, it is converted into vector data using data stored in a font data storage section. A graphic edge list production section produces, from the vector data, an edge list processed in the magnification of n times. The edge list is referred to in units of n scanning lines by a gray scale processing section, by which a new edge list with which a portion determined to be an edge of a figure is to be drawn in a half tone when necessary is produced. The second edge list is successively processed by a clipping processing section and an edge list merging section and then converted into raster data, which are outputted to an outputting apparatus such as a printer.

REFERENCES:
patent: 4853971 (1989-08-01), Nonura
patent: 4885786 (1989-12-01), Anderson et al.
patent: 5105472 (1992-04-01), Murayama
patent: 5228097 (1993-07-01), Kumagai

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