| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for aligning print position of a plurality of print heads in a printer easily with high accuracy. SOLUTION: At the time of complementary print with a plurality of print heads, a plurality of patterns are printed while shifting the dot formation timing of the other head by a specified amount, at a time, from that of one reference head. These patterns have area factors of dots formed by that printer dependent on the shift. When the plurality of patterns are read out optically as an average density, optical reading conditions (color of a color filter with respect to a light receiving section) are selected appropriately depending on the color formed by the plurality of heads. Consequently, reading accuracy is enhanced and a timing corresponding to the highest average density can be set as print position aligning conditions. |
