| 摘要 |
A coherent, optical signal processor for recognition of specific known targets at extremely high speeds, applying matched-filter techniques. A modified matched filter includes a pair of matched filters that will separately process the high and low spatial frequencies. By properly combining the outputs in a logical AND operation, the target may be interrogated for fine features as well as for correct size and shape. The optical memory bank of matched-filter pairs comprises known diffraction patterns of all resolvable views, in both azimuth and elevation, of the target, thus forming a target recognition comb-filter bank. All views of the recognition bank are simultaneously interrogated optically according to the diffraction pattern of the detected object to determine whether the detected object is the desired target as stored in any of the views in the memory bank.
|
