Method and system for displaying images

Vector data indicating a plurality of points for representing an image is classified for storage under three groups: a group 1 of the vector data DP, DP, DP indicating indispensable points P, P, P required for recognition of graphics G; a group 2 of the vector data DP, DP indicating first supplementary points P, P for supplementing the points P, P, P; and a group 3 of the vector data DP, DP, DP, DP indicating second supplementary points P, P, P, P for further supplementing the indispensable points P, P, P and first supplementary points P, P. When displaying an image, a selection is made between displaying the image represented by the group 1 and displaying the image represented by the group 1 plus the groups 2 and 3.