IMAGE FORMING APPARATUS, CONVEYANCE CONTROL METHOD, AND RECORDING MEDIUM

An image forming apparatus includes a printing device to print, on a recording medium, a colorimetric pattern including a plurality of colorimetric patches; an imaging device; a conveyor to convey the recording medium in a conveyance direction; and circuitry. The circuitry causes the printing device to form a plurality of marker patterns on a side of the colorimetric pattern and at predetermined intervals in the conveyance direction so that one of the marker patterns is downstream from a first row of the colorimetric patches in the conveyance direction; causes the conveyor to convey the recording medium to position the colorimetric pattern at a reading position by the imaging device based on a distance between the plurality of marker patterns and the colorimetric pattern in the conveyance direction; and causes the imaging device to read the colorimetric pattern on the recording medium.