Abstract
A demonstration of a real-time image correlator based upon acousto-optic and charge-coupled devices will be presented. This architecture performs the two-dimensional correlation utilizing one-dimensional input devices. Each input image line is read into the system one line at a time using an acousto-optic device (AOD). The reference templates are stored in an electronic memory and introduced into the optical system in row parallel using a one-dimensional laser diode array. As the information propagates down the length of the AOD it is correlated against all of the rows of the reference template; the result accumulates on a 2-D charge-coupled device (CCD). The correlation in the vertical direction is accomplished by operating the CCD in a shift-and-add mode. The demonstration involves tracking a moving grayscale object using a video cassette recorder as the input image source. The ability to rapidly correlate with multiple templates will also be demonstrated. The optics are mounted inside a 12 in. × 15 in. × 6 in. enclosure. The memory and control electronics are housed in a single VME card cage.
© 1990 Optical Society of America
PDF ArticleMore Like This
Perry A. Molley and K. Terry Stalker
MFF3 OSA Annual Meeting (FIO) 1989
C. J. Sherman, W. B. Lawler, M. G. Moharam, and R. Montgomery
ThK1 OSA Annual Meeting (FIO) 1990
Donald Wunsch, Tom Caudell, Aaron Falk, and David Capps
MJJ5 OSA Annual Meeting (FIO) 1990