Printing data processor, printing system, printing data correction method, inspection processing method and program

摘要

Correction instruction data is acquired by scanning a proof with an image scanner. Differential processing is performed between the correction instruction data and rasterized data for extracting differential data. The differential data is layered with unproofread printing data. A plurality of blocks are generated by virtually dividing a correction object layer in a latticelike manner. Upon acquisition of layered data and area division data, printing data is corrected according to a correction instruction described in a differential layer. At this time, correction history data is recorded in association with a block related to correction. Thus, correction history can be confirmed and re-corrected in units of blocks while employment/nonemployment of correction in each correction processing unit can be selected. First differential data is obtained as a differential between data prepared by rasterizing uncorrected and corrected printing data respectively. Correction instruction data is obtained by reading a proof with an image scanner. Second differential data is obtained by extracting a correction instruction from the correction instruction data. Area regulation data is obtained by regulating an arrangement position of the extracted correction instruction. Inspection data is obtained by layering the first differential data and the area regulation data. Inspection processing is performed on an image expressed by the inspection data. It is possible to determine whether or not correction processing has been performed according to the correction instruction through presence/absence of superposition of a differential area and a correction instruction area.