Detection Aspects of an Optical Matched Filter Image Correlator.
Abstract
Aerial photography for reconnaissance purposes is currently examined by human photointerpreters - a slow, costly, tedious process. Grumman, however, has developed an Optical Matched Filtered Image Correlation technique for automating the screening of aerial reconnaissance film. For the investigation described in this document, some detection aspects of this system were examined. A set of matched filters was made for an M-60 Army tank. A set of three filters varying in optimized spatial frequency was then selected. Correlation signal-to-noise ratios were obtained, and normalizations of the correlation plane signals to total scene intensity and total correlation plane intensity were performed. A simple thresholding technique was suggested. A point-by-point normalization technique was proposed with the intent of improving the signal-to-noise ratio for the system, and a simple application of this technique was implemented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1977
- Accession Number
- ADA040428
Entities
People
- Glenn M. Mehalek
Organizations
- Grumman