Patent ID: 8480197

Claim:
An image processing apparatus which performs an image processing for printing an image by discharging an ink droplet on a printing medium with a first nozzle for discharging a first ink droplet, a second nozzle for discharging a second ink droplet which is larger than the first ink droplet, and a third nozzle for discharging a third ink droplet which is larger than the second ink droplet, the second ink droplet being discharged on a pixel subjected to the first nozzle, and the third ink droplet being discharged on a pixel subjected to the first nozzle or the second nozzle, the apparatus comprising: a determination unit configured to determine a) whether or not the first nozzle is a discharge failure nozzle in which a state of discharging is not normal, b) whether or not the second nozzle is the discharge failure nozzle, and c) whether or not the third nozzle is the discharge failure nozzle; and a conversion unit configured to convert multi-valued data to binary data based on a table selected from a plurality of tables, wherein the table is selected from the plurality of tables based on a determination by the determination unit, and wherein the multi-valued data and the binary data are associated with each other in each of the plurality of tables, wherein the multi-valued data corresponds to a pixel on the printing medium and the binary data indicates either discharging or not discharging each of the first, second, or third ink droplets, wherein, in a case where any one of the first, second, and third nozzles is determined by the determination unit to be the discharge failure nozzle, the conversion unit converts the multi-valued data to the binary data based on the selected table, where the binary data is for printing by using other nozzles of the first, second, and third nozzles that are not the discharge failure nozzle, and wherein the discharge failure nozzle is not used.