Although Optical Spatial
Filtration has been known for over 25 years, it has received little
attention due to the lack of suitable devices with which to
implement systems. Hudson Research has pioneered the use of
interactive electro-optic devices to allow real-time operations on
complex data streams in the Fourier Domain. Techniques have been
developed which enable filters to be weighted for specific functions
or they can be built as linear interactive devices. The drawing
below shows a typical device. The dynamic range of these devices is
at least 12 bits, and 16 bit dynamic range can be achieved in a
properly structured system.
Figure 1 Optical Spatial
images show the results of the use of the filter of Figure 1.
Figure 2: Unprocessed