Real-Time Transformation of Incoherent Light Image to Edge-Enhanced Darkfield Representation for Cross-Correlation Applications.
Abstract
Cross-correlation of an image with a reference pattern is done in order to determine recognizable content and gives a sharp correlation peak whenever both image and pattern are edge-enhanced, darkfield representations. Incoherent light, conventional optics and electronics are used to obtain edge-enhanced, darkfield representations which are obtained by sensing the light from the object through a dual-aperture unit to a lens so that a recording medium located forward of the focusing plane of the lens will receive light blocked alternately by the regular (perimeter) stop and the central stop and will record the difference. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 21, 1980
- Accession Number
- ADD008218
Entities
People
- James L. Smith
Organizations
- United States Army