Optical method and system for generating expansion coefficients

Details Optical method and system for generating expansion coefficients Optical method and system for generating expansion coefficients

1994-01-12

1995-09-26

Mancuso, Joseph

Image analysis

Image transformation or preprocessing

Fourier transform

359560, 382210, G06K 976

Patent

active

054540470

ABSTRACT:
A system for optically generating expansion coefficients for an image processing function. The invention (10) includes a first optical element (18) for providing a transform of an image provided at a first image plane (16). A second optical arrangement (20) provides a product of the transform of the image and a transform of a convolving function. This product is transformed by a lens (22) to provide an image intensity distribution representative of expansion coefficients resulting from a convolution of the image by the convolving function. In a specific implementation, the convolving function is a wavelet and the intensity distribution is detected to provide the expansion coefficients.

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patent: 5159474 (1992-10-01), Franke et al.
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