In aerial photography, images of roads and other man-made structures are small compared to those of natural features. Their edges are usually indistinct from the background and often go undetected by automatic systems. A major problem encountered by automatic detection systems is the delineation of boundaries around areas containing features of interest. The computer is often unable to accomplish the detection process alone. Therefore, it is reasonable to combine the superior pattern recognition abilities of a human being with the computational power of a digital computer to form an interactive system. Such an interactive feature extraction system is discussed. The objective is to generate the photo coordinates for feature boundaries from aerial photographs. The hardware consists of a CDC-6400 sequential computer, a Goodyear STARAN associative array processor, a DEC PDP 11/50 minicomputer, and an image display, as well as digitizing and recording devices. The feature extraction program for the interactive system consists of a series of routines which were designed written and installed in the system by the author. The routines were written in FORTRAN and/or the STARAN assembly language according to the intended application in order to use the computers efficiently. /Author/

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  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  United States  22046
  • Authors:
    • Wang, JYC
  • Publication Date: 1977-12

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Filing Info

  • Accession Number: 00168419
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 16 1978 12:00AM