Image forming apparatus wherein data is converted between multi-

Details Image forming apparatus wherein data is converted between multi- Image forming apparatus wherein data is converted between multi-

1995-12-26

1997-09-30

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

358296, 358403, 358426, 358444, 358451, H04N 1387, H04N 141, H04N 1393

Patent

active

056731167

ABSTRACT:
In the electronic sort of a digital copying machine, image data of a document consisting of a plurality of sheets are read and compressed to bi-level data in a memory. The compressed image data are recovered to multi-level data successively. When a plurality of copies of the document are produced, the recovery action is repeated by the number of the copies. In a facsimile machine combined with a digital copying machine, bi-level image data for the automatic reduction transmission are recovered first to multi-level image data, and the density of the multi-level image data is changed for the reduction. Then, the multi-level data are converted to bi-level data for facsimile transmission. In a digital two-color copying machine, multi-level image data of the second color of the two colors to be recorded later has to be synchronized to those of the other in correspondence to the delay of the recording time between the two colors. Then, the multi-level image data of the second color are converted to bi-level data in a delay memory in real time, and the bi-level data are read later from the delay memory and recovered to multi-level data.

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Yoshinobu Mita et al., "Higher Fine Multi-Value Recovery of Binary Image by Nural Network", Japan Hard copy, '90 NIP-24, pp. 233-236, 1990 (English Translation).

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