When the density adjustment is performed on a plurality of density areas by overlapping adjacent density areas with each other, output inversion may occur in the overlapped density area after the adjustment depending on an adjustment setting value. An image processing apparatus generates a correction characteristic based on adjustment values according to the plurality of density areas, corrects the correction characteristic to monotonously increase an inversion section of the correction characteristic in a case where a change in a gradation is inversed in the generated correction characteristic, and adjusts the density of image data based on the corrected correction characteristic.