Patent ID: 8328314

Claim:
A print controller controlling an inkjet head to eject ink to record an image on a recording medium conveyed in a conveying direction, the inkjet head having a plurality of nozzles that are arranged such that a plurality of corresponding distances in a first direction between nozzles that are adjacent with each other in the first direction are uniform and a plurality of corresponding distances in a second direction orthogonal to the first direction between the nozzles that are adjacent with each other in the first direction are nonuniform, the print controller comprising: an acquiring unit that acquires image data representing an image having a plurality of pixels, the image data including a plurality of sets of pixel data corresponding to the plurality of pixels; a storing unit that stores a plurality of dot size determining values corresponding to the plurality of nozzles, each dot size determining value being defined to determine a size of a dot to be formed by the corresponding nozzle and being determined dependently on a distance in the second direction between the corresponding nozzle and a nozzle adjacent to the corresponding nozzle in the first direction; and a determining unit that determines a size of a dot to be formed by each nozzle based on the pixel data and the corresponding dot size determining value, wherein each dot size determining value is defined according to a greater one of a first distance and a second distance, the first distance indicating a distance between two dots which are to be formed on the recording medium by the corresponding nozzle and a first adjacent nozzle and which are to be arranged in a third direction orthogonal to the conveying direction, the first adjacent nozzle being located adjacent to the corresponding nozzle in the first direction, the second distance indicating a distance between two dots which are to be formed on the recording medium by the corresponding nozzle and a second adjacent nozzle and which are to be arranged in the third direction, the second adjacent nozzle being located adjacent to the corresponding nozzle in the first direction on an opposite side of the first adjacent nozzle with respect to the corresponding nozzle.