Computer-controlled document data filing system.

摘要

In a data filing system, a data input unti (10) converts an input document into an electrical image signal. A data processing unit (12) sequentially performs multi-step image compression processing including a pattern recognition step. The processing unit (12) includes subprocessors (12-1, 12-2, 12-3, ..., 12-n) which independently execute corresponding image compression processing of higher processing levels. A data storage unit (14) has a hierarachical memory structure, so that, when it receives compression image data of a given image processing level from the processing unit (12), it can store data in accordance with its image processing level. A system controller (20) causes, in the document registration mode, the first subprocessor (12-1) of the data processing unit (12) to execute image compression processing of a first level, and causes the data storage unit (14) to store the resultant compression image data. The system controller (20) causes the remaining subprocessors (12-2, 12-3, ..., 12-n) to intermittently execute the subsequent image compression processing during the idle time of the filing system.