Method for detecting external contour of objects being treated; prepares flat image for section of area being treated while specifying external contour spots in image surface of section

摘要

A flat image for a section of an area to be treated is prepared. The image surface is vertical to a symmetry surface for this area. Image halves separated by the symmetry surface are coordinated by regular reflection on the symmetry surface. The image content difference between the coordinated halves is determined and information received is processed for specifying the external contour spots in the image surface of the section from the object being treated.