Patent ID: 8520259

Claim:
An image processing apparatus for processing image data corresponding to an area of the print medium so as to perform printing to the area by a plurality of relative movements between a print head and the print medium, the image processing apparatus comprising: a generation unit configured to generate, based on the image data, a plurality of pieces of multi-valued image data corresponding to the plurality of relative movements respectively and corresponding to the same color; and a quantization unit configured to quantize each of the plurality of pieces of multi-valued image data generated by said generation unit; wherein said generation unit generates the plurality of pieces of multi-valued image data such that the number of the pieces of the multi-valued image data for printing of an area to which the image data having a gray scale value lower than a first value corresponds is a first number, the number of pieces of the multi-valued image data for printing of an area to which the image data having a gray scale value higher than the first value and lower than a second value corresponds is a second number higher than the first number, and the number of the pieces of the multi-valued image data for printing of an area to which the image data having a gray scale value higher than the second value corresponds is a third number higher than the second number.