Pixel density conversion apparatus

Details Pixel density conversion apparatus Pixel density conversion apparatus

1992-06-05

1993-09-07

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358451, H04N 140, H04M 1393

Patent

active

052434400

ABSTRACT:
A pixel density conversion apparatus of this invention uses linear interpolation in pixel density conversion. Image deterioration caused by the pixel density conversion is suppressed by adding a converted pixel to the position of a non-converted pixel upon execution of equal-magnification processing, and by overlapping a first converted pixel to the midpoint position between the position of a first non-converted pixel and the position of a pixel adjacent thereto.

REFERENCES:
patent: 4595958 (1986-06-01), Anderson, Jr. et al.
patent: 4930021 (1990-05-01), Okada
patent: 4958237 (1990-09-01), Kubota
patent: 5001574 (1991-03-01), Shimizu et al.
patent: 5128777 (1992-07-01), Uno

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