METHOD FOR DETERMINING A COORDINATE OF A FEATURE POINT OF AN OBJECT IN A 3D SPACE

A method for determining a coordinate of a feature point of an object in a 3D space comprises: arranging at least one dedicated pointer in the 3D space in a pre-determined relation to the feature point of the object in the 3D space, wherein each dedicated pointer has at least one visible feature in line of sight of the camera; capturing at least one image by using the camera; performing image feature detection on the at least one captured image to determining a coordinate of the respective at least one visible feature of each dedicated pointer; and determining the coordinate of the feature point of the object in the 3D space based on the determined coordinate of the respective at least one visible feature of each dedicated pointer.