Image processing apparatus

Details Image processing apparatus Image processing apparatus

1993-08-06

1994-06-14

Brinich, Stephen

Facsimile and static presentation processing

Natural color facsimile

Specific image-processing circuitry

358536, H04N 140

Patent

active

053215320

ABSTRACT:
An image processing apparatus has a memory device for storing pixel image data, including both halftone image data such as data of image of a photograph having a gradation, and line image text data such as data, containing characters. The storage is conducted on the basis of blocks each having a predetermined number of pixels. The mean information quantity of the halftone image data per pixel stored in the memory means is not greater than the information quantity of the line image data per pixel stored in the memory means. The halftone image data is compressed on the basis of blocks. Therefore, both the halftone image data and line image data can be stored in a small memory by using common addresses, without causing any degradation of the image quality.

REFERENCES:
patent: 3555262 (1968-05-01), Shimada
patent: 4349835 (1982-09-01), Horiguchi et al.
patent: 4884130 (1989-11-01), Huntsman
patent: 5003474 (1991-03-01), Ng
patent: 5070413 (1991-12-01), Sullivan et al.
"Printer Character Generator With Image Feature", IBM Technical Disclosure Bulletin, vol. 13, No. 9, (Feb. 1989).

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