An acousto-optic image correlator with a throughput rate of 1000 templates per second

Conference · Tue Mar 27 23:00:00 EST 1990

DOI:https://doi.org/10.1117/12.21227· OSTI ID:7183874

Molley, P A

A two dimensional image correlator based on acousto-optic (AO) and charge-coupled devices (CCDs) is described that can be built with existing technology to provide 1000 frames per second operation. In recent years, architectures have been developed that perform the two dimensional correlation utilizing one dimensional input devices. The input scene is loaded into the acousto-optic device (AOD) one line at time. This line is then correlated against all of the rows of a reference template introduced into the optical system using a one dimensional array of LEDs or laser diodes. However, it generally takes a much greater time to load the AO cell than it does to process the information. this latency time severely limits the maximum throughput rate of the processor. This paper introduces a new acousto-optic correlator implementation that overcomes this bottleneck so that processing can occur close to 100% of the time. A grayscale image correlator is proposed that can be built using present technology that can realistically achieve throughput rates on the order of 10{sup 12} operations per second. This translates to over 1000 correlations per second for input scenes with dimensions of 512 {times} 512 pixels and reference templates of size 64 {times} 64 pixels. 10 refs., 4 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7183874
• Report Number(s): SAND-89-2383C; CONF-9004125--3; ON: DE90009323
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420203 -- Engineering-- Handling Equipment & Procedures
440600 -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS
990200* -- Mathematics & Computers
ACOUSTICS
COMPUTER ARCHITECTURE
EQUIPMENT
FOURIER TRANSFORMATION
IMAGE PROCESSING
INTEGRAL TRANSFORMATIONS
LASERS
OPTICAL EQUIPMENT
PATTERN RECOGNITION
PROCESSING
REAL TIME SYSTEMS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SOLID STATE LASERS
TRANSFORMATIONS