1. An image processing apparatus which performs image processing for an original image obtained by reading an original, comprising: a reading unit, adapted to read an original; a generation unit, adapted to generate vector data corresponding to an original image read by said reading unit; a display unit, adapted to display an image; a display control unit, adapted to generate an edit image of the original image corresponding to a display resolution of said display unit on the basis of the vector data and controlling to display the edit image on said display unit.