Real-time optical subtraction of photographic imagery for difference detection
- 1 April 1976
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 15 (4) , 871-876
- https://doi.org/10.1364/ao.15.000871
Abstract
Interferometric techniques described in this paper permit real-time optical image subtraction of two input photograph transparencies without the necessity of intermediate processing steps (e.g., holograms or contact-print transparencies). These interferometric techniques allow the use of a white-light source as well as an extended light source, small input-collimator optics, and optical components with minimal requirements on wavefront quality. Experimental results with NASA LANDSAT (formerly ERTS) photographs are presented.Keywords
This publication has 1 reference indexed in Scilit:
- Optical Image SubtractionOptical Engineering, 1975