HETERODYNE OPTICAL CORRELATION (HOC)

A new image-correlation concept based upon optical heterodyne dectection is presented. In the Heterodyne Optical Correlator System (HOC), two transparencies are relatively oriented and projected onto a common image plane where coincidence is detected. By means of heterodyne optical techniques, the normalized correlation coefficient is determined at each element of a photo diode array detector in the common image place. These correlation values are used to define regions of corresponding image coincidence for a given x-parallax condition. The basic principle of the HOC operation is expressed and an experimental system described. Potential applications for stereocompilation and cartographic feature extraction are briefly described and several other applications are listed. The unique features of the HOC as an area correlation system are included.

• Corporate Authors:

  American Society of Photogrammetry

  105 North Virginia Avenue
  Falls Church, VA  United States  22046
• Authors:
  • Balasubramanian
  • Leighty, R D
• Publication Date: 1976-12

Media Info

• Features: Figures; References;
• Pagination: p. 1529-37
• Serial:
  • American Society of Photogrammetry, Journal of
  • Volume: 42
  • Issue Number: 12
  • Publisher: American Society of Photogrammetry

Subject/Index Terms

• TRT Terms: Correlation analysis; Diodes; Imagery; Optical systems; Transparence
• Uncontrolled Terms: Experimental design
• Old TRIS Terms: Images; Parallax; Stereocompilation
• Subject Areas: Data and Information Technology; Design; Highways;

Filing Info

• Accession Number: 00148402
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 30 1977 12:00AM