Apparatus for reproducing image densities using pixel processing

Details Apparatus for reproducing image densities using pixel processing Apparatus for reproducing image densities using pixel processing

1993-07-12

1996-07-02

Wong, Peter S.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358456, 358465, 347131, H04N 140, G01D 1514

Patent

active

055328270

ABSTRACT:
Partial images each constituting a predetermined matrix are sequentially taken out, and density data corresponding to pixels constituting the matrix are subjected to correction. The correction of the density data is so made as to respectively add density correcting values predetermined to correspond to pixel positions in the matrix to the density data. Consequently, the density data corresponding to the pixels constituting the matrix are considerably varied. Therefore, in a binary image obtained by subjecting the partial image constituting the matrix to halftone processing, the density of a document image is sufficiently reproduced.

REFERENCES:
patent: 5086484 (1992-02-01), Katayama et al.
patent: 5184213 (1993-02-01), Ishida
patent: 5245444 (1993-09-01), Hashimoto
patent: 5291309 (1994-03-01), Semasa
patent: 5321525 (1994-06-01), Hains
patent: 5394250 (1995-02-01), Shono

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