Patent ID: 7460271

Claim:
An ink jet printing apparatus using a printing head capable of ejecting black ink and at least one color ink for printing an image on a printing medium by forming black dots of the black ink and color dots of the color ink based on black data for ejecting the black ink and color data for ejecting the color ink, comprising: first detecting means for detecting a first printing area in which the number of the black dots to be formed is a predetermined value or greater, based on the black data; second detecting means for detecting, as a second printing area, a printing area in which the color dots are to be formed and an adjacent printing area adjacent to the printing area, based on the color data; first providing data generating means for generating first providing data for providing the color dots in the first printing area, based on the black data corresponding to the first printing area; second providing data generating means for generating second providing data for providing the color dots in the second printing area, based on the black data corresponding to the second printing area; printing color data generating means for generating printing color data based on the first providing data, the second providing data and the color data; and control means for controlling the printing head based on the black data and the printing color data for printing the image.