| 摘要 |
PURPOSE:To accurately settle the position of a reference point, by dividing the picture elements of outlines and finding the proportion of a part in an area and the position of a geometric feature point, such as the center of gravity, etc., by adding the part to the area. CONSTITUTION:A picture element string extracting circuit 3 extracts the picture element strings of a designated area from a picture image memory 2 and a painting-out circuit 4 paints out the extracted picture element strings. A picture element dividing circuit 5 reads out the luminance of the painted-out picture elements and the picture elements in the vicinity of the painted-out ones and divides the area into two, an inside area and outside area, and then, finds a reference area. An accumulated luminance value counting circuit 6 successively counts the luminance value in the reference area by regarding them as uniform and a centroid position determing circuit 7 determines the centroid position by using an accumulated luminance graph implemented by the circuit 6 and finds the position of a specified point (GCP) on a map from the position of the center of gravity, and then, outputs the position.
|
