Patent ID: 8052242
Filing Date: 2011-11-08
Classification: B41J

Abstract:
1. An image forming apparatus which forms a halftone image on a print medium by using a multipass process to scan a printhead N (N is an integer of not less than 2) times in a single area on the print medium and form dots by each scan operation, the apparatus comprising: a first print density setting unit configured to limit a print density of a scan operation in a first pass based on landing error information representing a positional error of a formed dot from an ideal position, so as to prevent dots from overlapping with each other on the print medium; a second print density setting unit configured to set print densities of scan operations in second to Nth passes; a print data generation unit generating print data of respective scan operations in accordance with the print densities set by the first print density setting unit and the second print density setting unit; and a printing unit printing the halftone image on the print medium based on the print data generated by the print data generation unit.