Image processing apparatus, image processing system, and program

An image processing apparatus comprising:

• a receiving unit that receives all image data of a plurality of pages that are imposed for making a double-page-spread booklet;
• an input unit that inputs data of the number of pages in vertical and horizontal directions and data of a page opening direction of the booklet to the all image data that is received by the receiving unit, the vertical and horizontal directions being defined beforehand;
• a calculation unit that calculates a division number on the basis of the data of the number of pages and the data of the page opening direction that are input by the input unit;
• an all image data dividing unit that divides the all image data into divided image data on the basis of the division number that is calculated by the calculation unit, the all image data being received by the receiving unit;
• and
• an acquisition unit that acquires bind width data and back width data from the all image data,
• wherein, when correcting a printing position so as to adjust a width of a margin, the printing position being a position at which the divided image data is printed on a print sheet, the printing position is corrected by calculating the margin from the acquired bind width data, the acquired back width data, a length of the print sheet in a correction direction, a length of the divided image data in the correction direction, and the number of pages of the divided image data in the correction direction.