| 摘要 |
The technique of the present invention prints positional misalignment test pattern with a nozzle group without sub-scan feed. The positional misalignment test pattern includes a rear test sub-pattern and a front test sub-pattern printed at different positions shifted in a sub-scanning direction. The rear test sub-pattern is printed with a rear nozzle sub-group, whereas the front test sub-pattern is printed with a front nozzle sub-group. The technique determines a correction value according to correction information that represents a favorable correction state selected based on the printed positional misalignment test pattern, and then actually corrects misalignment of recording positions in a main scanning direction occurring in bidirectional printing, using the correction value thus determined. <IMAGE> |
