Graphics processing system for deleting one of overlapping line and graphics images

A graphics processing system arranged to display on a display screen of a display unit a line image produced from image data stored in a storage device and graphics produced from graphics data stored in a storage device in an overlapping manner, comprising:

• display means for displaying the line image and the graphics in an overlapping manner;
• first storage means for storing the line image produced from the image data;
• second storage means for storing the graphics produced from the graphics data;
• line image delete processing means for processing pixels of said image and said graphics data stored in said first and second storage means, respectively, to delete the line image in a segment in which a pixel displaying the graphics is displayed so as to overlap with a pixel displaying the line image, wherein the line image delete processing means is implemented so as to leave only the pixel displaying the graphics undeleted and to delete the pixel displaying the line image that is located within a range that is broader than a predetermined line width of a distorted line up to a line width of the line image;
• and
• said line image delete processing means including means for determining if a pixel of the line image is an object for deletion located within said range, and for converting the pixel determined to be the object for deletion into a pixel with a background color with respect to the graphics.