公开(公告)号：GB2313730B

公开(公告)日：2001-01-17

申请号：GB9710899

申请日：1997-05-27

Applicant: KOREA TELECOMM AUTHORITY

Inventor： KIM SUNG RYONG ,  KIM YOUNG MAN ,  BAIK SONG HOON ,  KIM HYO SIL ,  JEONG JAE WOO

IPC: G06K19/00 ,  G09B29/00 ,  G09B29/10 ,  H04N1/00 ,  G06T1/00 ,  H04N5/00

Abstract: Line components of raster data obtained by scanning an original map are digitized to thereby provide vector data for an electronic map. To automatically verify the accuracy of this vector data it is transformed into raster data using a desired algorithm, such as the Bresenham algorithm, and then the edges of the line components are transformed into sawtooth-shaped edges. This saw-tooth-shaped raster data (upper right, fig 4) is then XORed with the original raster data (upper left, fig 4). The remaining noise is then removed using a filter having a desired size eg of 2x2 pixels, thereby enabling the accuracy of the electronic map to be verified.