Patent ID: 7786976

Claim:
A coordinate calculating apparatus for calculating two object position coordinate points from an image captured by an image capturing apparatus, the two object position coordinate points indicating positions of two predetermined objects whose images to be captured, the positions being on a plane corresponding to the captured image, the apparatus comprising: coordinate detecting means of detecting a position coordinate point of an area satisfying a predetermined condition in the captured image for each area; reference setting means of setting a reference with respect to at least one of a direction connecting two position coordinate points in the captured image and a length between the two position coordinate points; selection means of, when a plurality of position coordinate points are detected by the coordinate detecting means, with respect to combinations of two position coordinate points among the plurality of position coordinate points, comparing at least one of a direction connecting two position coordinate points in the combinations and a length between the two position coordinate points, with the reference, and selecting a combination of two position coordinate points in the combinations most close to the reference as the two object position coordinate points.