Hybrid processor to compute invariant moments for pattern recognition
Abstract
The paper describes a hybrid processor that optically computes all the bipolar moments of a two-dimensional image in parallel, from which invariant moments can be computed by a dedicated digital postprocessor. The use of this and similar optical techniques that do not employ matched spatial filtering appears to be of importance in the realization of practical hybrid pattern-recognition systems.
- Publication:
-
Optics Letters
- Pub Date:
- September 1980
- DOI:
- 10.1364/OL.5.000395
- Bibcode:
- 1980OptL....5..395C
- Keywords:
-
- Hybrid Computers;
- Image Processing;
- Optical Data Processing;
- Parallel Processing (Computers);
- Pattern Recognition;
- Spatial Filtering;
- Analog To Digital Converters;
- Fourier Transformation;
- Invariance;
- Moment Distribution;
- Real Time Operation;
- Instrumentation and Photography