Image processing apparatus and method

Details Image processing apparatus and method Image processing apparatus and method

1992-03-20

1995-01-10

Nguyen, Phu K.

G06F 1562

Patent

active

053815220

ABSTRACT:
An image processing apparatus where plural line memories store first image information corresponding to a first recording density based on input image data for plural lines, and a logical circuit included in a decision circuit determines a pixel data to be interpolated corresponding to the pixel position of second image information when the first image information is converted to the second image information in accordance with the stored first image information for plural lines. A logical circuit also included in the decision circuit detects an predetermined pattern in accordance with the stored image information for plural lines when the pixel data to be interpolated is determined, calculates a logical expressions for predetermined pattern diffusing processing, and determines a value of the pixel to be interpolated to diffuse the predetermined pattern in the second image information. With the above structure image information for a lower recording density is converted to information for a higher recording density, where half-tone images in high quality can be obtained.

REFERENCES:
patent: 5123085 (1992-06-01), Wells et al.
patent: 5202960 (1993-04-01), Seiler

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