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Class Information
Number: 382/210
Name: Image analysis > Pattern recognition > Template matching (e.g., specific devices that determine the best match) > Spatial filtering (e.g., holography)
Description: Subject matter in which an optical image of each pattern* to be recognized is transformed into a light amplitude distribution that is proportional to the two-dimensional Fourier transform of the pattern* image, and a spatial filter located in the transform plane modifies selected Fourier components of the resulting Fourier spectrum.

Sub-classes under this class:

Class Number Class Name Patents
382/211 With electrically controlled light modulator or filter 77

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
4053228 Finger identification Oct. 11, 1977
4023010 Optical identification system and reader for reading optical gratings on a record medium May. 10, 1977
3991401 Method of recognizing words for an associative store and an optical device for implementing said method Nov. 9, 1976
3984802 Feature recognition system Oct. 5, 1976
3984671 Optical process for producing classification maps from multispectral data Oct. 5, 1976
3944978 Electro-optical method and apparatus for making identifications Mar. 16, 1976

1 2 3 4 5

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