Image processing apparatus, document management server, and method of image processing

A document management server which connected to an input-output device including a function of reading a paper, and a function of printing, comprising:

• printing control unit configured to control the input-output device to print a plurality of pages on one sheet of paper according to a print setting information which indicates a printing form, and to print a code indicating the print setting information;
• image reading unit configured to read the paper by the function of image reading of the input-output device;
• extracting unit configured to extract the code from the read image;
• difference image extracting unit configured to generate a print image including a plurality of pages based on the print setting information which is indicated by the code, and to extract a difference image between the print image and the read image;
• and
• determination unit configured to determine a correlation between the difference image and a page included in the print image.

A method of image processing comprising:

• printing a plurality of pages on one sheet of paper according to print setting information which indicates a printing form, and printing a code indicating the print setting information on the paper;
• reading the paper;
• extracting the code from the read image;
• generating a print image including a plurality of pages based on the print setting information which is indicated by the extracted code;
• extracting a difference image between the print image and the read image;
• and
• determining a correlation between the difference image and pages included in the print image.