Picture processing system for a natural picture in a facsimile device

摘要

In a picture processing system for processing an input picture data signal representative of an original picture, such as a color natural picture, into a processed picture data signal, a detecting unit produces a difference picture data signal representative of a difference between the input picture data signal and an expanded picture data signal. The expended picture data signal is produced by a picture data expanding unit which expands a compressed picture data signal. The compressed picture data signal is produced by a first compressing section which compresses the input picture data signal. A converting unit converts the difference picture data signal into a binary picture data signal. A second compressing section compresses the binary picture data signal into a compressed binary picture data signal which is for use as the processed picture data signal. Preferably, the system further has a transmitting unit for transmitting the compressed binary picture data signal to an external device as a facsimile data signal, a binary picture data expanding unit for expanding the compressed binary picture data signal into an expanded binary picture data signal, and an output unit for outputting the expanded binary picture data signal as an output picture image. The expanded binary picture data signal may be transmitted as the facsimile data signal instead of the compressed binary picture data signal.