Liquid ejection system to form image with manifold gradations

A liquid ejection system comprising:

• a head having a plurality of nozzles including a first nozzle and a second nozzle, the plurality of nozzles being aligned in a first nozzle row and a second nozzle row, the first nozzle row and the second nozzle row extending in a first direction and being arranged along a second direction intersecting the first direction;
• and
• a controller system configured to:
• determine a first individual amount of liquid to be ejected from the first nozzle, and a second individual amount of liquid to be ejected from the second nozzle, based on a pixel value of a particular pixel included in image data, including:
• determining a total amount of liquid to be ejected for the particular pixel based on the pixel value of the particular pixel;
• and
• determining the first individual amount for the first nozzle and the second individual amount for the second nozzle based on the determined total amount;
• and
• control the head to eject liquid of a same color from at least one of the first nozzle or the second nozzle into a particular area on a recording medium while moving one of the head and the recording medium relative to the other along the second direction, the first nozzle being controlled to eject the liquid of the determined first individual amount, the second nozzle being controlled to eject the liquid of the determined second individual amount.