Patent ID: 8376500

Claim:
An image recording apparatus comprising: a measuring pattern recording unit which includes a plurality of recording element arrays, each composed of recording elements configured to record ink dots on a recording medium, wherein the measuring pattern recording unit is configured to move the recording medium relative to the plurality of recording element arrays, and to drive the recording elements of each recording element array, thereby recording a prescribed plurality of measuring patterns; a read unit configured to read the measuring patterns recorded on the recording medium; and a record-position shift calculating unit configured to calculate relative record shifts of the measuring patterns from reading results acquired by the read unit, wherein the measuring pattern recording unit records the plurality of measuring patterns on the recording medium such that gravity centers of the plurality of measuring patterns are identical in position on both a first coordinate axis and a second coordinate axis, the first coordinate axis being parallel to a direction in which the recording medium is moved relative to the plurality of recording element arrays, and the second coordinate axis being parallel to a direction in which positions of the recording element arrays are adjusted.