There is provided an image processing apparatus that comprises at least one processor and at least one memory coupled to the at least one processor. The at least one memory stores instructions that, when executed by the at least one processor, cause the at least one processor to generate first bitmap data and second bitmap data different from the first bitmap data based on PDL data, acquire, based on an analysis result of the first bitmap data, a gamut mapping table that associates the second bitmap data with a print color gamut, correct the second bitmap data based on the gamut mapping table, and generate quantized image data based on the corrected second bitmap data.