1. An image processing apparatus comprising: a background color acquiring unit that acquires a background color based on color data of pixels included in image data; an area acquiring unit that acquires a background color area including a pixel having color data of the background color, based on the image data; a determining unit that determines whether the background color area acquired by the area acquiring unit is adjacent to a non-background color area outside of the background color area, the non-background color area including a pixel having color data of a first color that is preset so that the color data of the pixel in the background color area can be converted thereto; and a converting unit that converts the color data of the pixel in the background color area into the first color when the determining unit determines that the background color area is not adjacent to the non-background color area which includes the pixel having the color data of the first color, and converts the color data of the pixel in the background color area into a second color which is different from the first color when the determining unit determines that the background color area is adjacent to the non-background color area which includes the pixel having the color data of the first color.