Printing system and printing determination method

A printing system comprising:

• a printing unit that performs printing on a print medium based on print data;
• a position determiner that randomly determines a position where a first information code is to be set in a printable region in which the print medium is printable by the printing unit;
• a storage unit that stores positional information at the time of the printing that indicates the position determined by the position determiner;
• a modifier that modifies print data for printing an image and the first information code so that the first information code is set at the position determined by the position determiner;
• an acquirer that acquires the position of the first information code on the print medium as positional information after the printing via reading of a printing result of the printing performed by the printing unit on the print medium based on the print data;
• and
• a determiner that determines whether the printing result is a falsified matter based on comparison of the positional information after the printing acquired by the acquirer with the positional information at the time of the printing acquired from the storage unit.

A printing determination method comprising:

• a position determination step of determining a position where a first information code is to be set in a printable region in which a print medium is printable by a printing unit;
• a modification step of modifying print data for printing an image, the first information code, and a positional information code having recorded therein positional information at the time of printing that indicates the position determined by the position determination step so that the first information code is set at the position determined by the position determination step;
• a printing step of performing the printing by the printing unit on the print medium based on the print data;
• an acquisition step of acquiring the position of the first information code on the print medium as positional information after the printing via reading of a printing result of the printing by the printing step and acquiring the positional information at the time of the printing from the positional information code;
• and
• a determination step of determining whether the printing result is a falsified matter based on comparison of the positional information after the printing acquired by the acquisition step with the positional information at the time of the printing acquired by the acquisition step.