Accession Number : AD0774103

Title :   Automatic Recognition of Complex Three-Dimensional Objects from Optical Images,


Personal Author(s) : McGhee,Robert B.

Report Date : OCT 1973

Pagination or Media Count : 28

Abstract : The paper surveys techniques which have been used for automatic recognition of aircraft and other complex three-dimensional objects from optical images. All methods reported in unclassified literature are described and compared. A detailed description of an experimental system using live television images is included. This system makes use of certain features derived from the central moments of a binary image of the object. These features, called moment invariants are invariant with image rotation, translation, and size. It is reported that a classification error rate of only five percent was obtained in a laboratory experiment involving noisy images of six aircraft types. Human error rates in classifying the same images averaged ten percent. (Author)

Descriptors :   *Pattern recognition, *Optical images, *Aircraft, *Optical detection, Three dimensional, Classification, Automatic, Statistical analysis

Subject Categories : Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE