The demand for on-line vision systems capable of performing image analysis at a high
throughput is rapidly increasing. For inspection tasks such as quality assurance where a …

Abstract The use of Coherent Optical Processors (COPs) for quality control applications is
hampered by the low diffraction efficiencies of amplitude-type Matched Spatial Filters (MSFs) …

Inaccurate positioning and low-quality optics introduce position-dependent phase errors into
coherent optical processors. For the inspection of composite objects, these lead to …

A real-time Vander Lugt correlator for the automatic recognition, location and inspection of
objects from direct imaging or TV camera input is described. Techniques to cope with …

Two important operations that can be performed by coherent optical processing systems are
image detection and image restoration. These operations require complex spatial filters, and …

--<d~8;;;-;TH=RU::-)--I Page 1 ..\ \' , ~' \ , ' 1-7-11-71-292 " . f , ',EXPER,IMEN'TS IN SPATIAL" -C'OHERENl
OPTICAL- 'F'ILTER'ING, ~.. - , . . - ( , ' '.';- ' .....,. ". ';--' , .' '(NASA-TM-X-65828) EXPERIMENTS …

Integrated coherent optical processors are presented and their applications to the field of
pattern recognition are considered. It is noted that having coherent optical processors in …

Recent advances, including binary phase-only filters (BPOF) implemented with suitable real-
time devices, have enhanced the potential of coherent optical correlation for pattern and …

The application of optical computing to sensor-based robots will be described in terms of
processing image information in real-time by the methods of spatial Fourier transform …

Spatial coherence in optical processing can be exploited to implement a wide variety of
image processing functions. While fully coherent systems tend to receive the most attention …