Image forming apparatus, misregistration correction control method and computer-readable information recording medium

A misregistration correction control method in an image forming apparatus which carries out misregistration correction for image formed positions of a plurality of colors with the use of misregistration correction patterns, said misregistration correction control method comprising:

• a pattern forming step of forming a pattern image of either misregistration correction patterns including a plurality of position detecting marks or misregistration correction performing determination patterns having a plurality of position detecting marks, the number of which marks is smaller than that of the misregistration correction pattern image;
• a misregistration amount calculating step of calculating a misregistration amount based on an image formed position detected with the use of the pattern image formed in the pattern forming step;
• a correction performing determination step of determining whether misregistration correction is to be carried out, based on the misregistration amount calculated in the misregistration amount calculating step with the use of image formed positions of the misregistration correction performing determination patterns formed in the pattern forming step;
• and
• a correcting step of, when it is determined in the correction performing determination step to carry out misregistration correction, carrying out misregistration correction based on the misregistration amount calculated in the misregistration amount calculating step with the use of image formed positions of the misregistration correction patterns formed in the pattern forming step.

A computer-readable information recording medium embodying a misregistration correction control program which, when executed by a computer processor, performs a misregistration correction control method in an image forming apparatus which carries out misregistration correction for image formed positions of a plurality of colors, with the use of misregistration correction patterns, said misregistration correction control method comprising:

• a pattern forming step of forming a pattern image of either misregistration correction patterns including a plurality of position detecting marks or misregistration correction performing determination patterns having a plurality of position detecting marks, the number of which marks is smaller than that of the registration correction patterns;
• a misregistration amount calculating step of calculating a misregistration amount based on an image formed position detected with the use of the pattern image formed in the pattern forming step;
• a correction performing determination step of determining whether misregistration correction is to be carried out, based on the misregistration amount calculated in the misregistration amount calculating step with the use of an image formed position of the correction performing determination patterns formed in the pattern forming step;
• and
• a correcting step of, when it is determined in the correction performing determination step to carry out the misregistration correction, carrying out the misregistration correction based on the misregistration amount calculated in the misregistration amount calculating step with the use of image formed positions of the misregistration correction patterns formed in the pattern forming step.