Patent attributes
An image printing apparatus prints image data using a plurality of printheads. A correction parameter is set in accordance with a printing element positional relationship between the plurality of printheads. A density correction signal calculation unit calculates a density correction signal based on the correction parameter and a signal value of at least one pixel adjacent to a switching position of image data from a printing element of one printhead to a printing element of another printhead. A quantization unit quantizes the density correction signal into a quantized density correction signal. A correction signal printing unit forms at least one print dot adjacent to the switching position of a line including at least one pixel or a neighboring line based on the quantized density correction signal.
