Print data processor

摘要

Provided is a print system for generating print data and print job data such that they may be restored from a printed matter. PDL-converted layout data that can be obtained by performing PDL conversion of predetermined layout data is symbolized in a predetermined encoding technique, and image data of the obtained symbol is PDL-converted. The resulting data is combined with the PDL-converted layout data and then supplied to a printer as print data. Printing of this print data results in a printed matter PM, in which a symbol SB is added to a substantive image, i.e., the image of contents desired to represent at the time of layout. By a predetermined restore processor with decode means corresponding to the encoding technique, the symbol SB is read and decoded, thereby faithfully restoring the PDL-converted layout data. Once a document is kept as a printed matter, the reuse of layout data is easy to carry out, without retaining electronic data. Alternatively, print job data composed of layout data having a PDL format and print processing conditions necessary for printing are symbolized in a predetermined encoding technique. Image data of the obtained symbol is PDL-converted and combined with the layout data, thereby obtaining print j ob data. The execution of print processing of the print job data results in a printed matter, in which a symbol is added to a substantive image, i.e., the image of contents desired to represent at the time of layout. By a predetermined restore processor with a decoding technique corresponding to the encoding technique, the symbol SB is read and decoded, thereby faithfully restoring first print job data. Once a document is kept as a printed matter, reprinting based on print job data can be executed easily and reliably, without retaining electronic data.