Image deconvolution by a logarithmic exponential nonlinear joint

Details Image deconvolution by a logarithmic exponential nonlinear joint Image deconvolution by a logarithmic exponential nonlinear joint

1990-06-29

1992-05-05

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 31, 382 54, 359559, G06F 15332

Patent

active

051115158

ABSTRACT:
A logarithmic/exponential nonlinear joint transform processor performs image deconvolution and is used to restore smeared or out of the focus degraded images. The correct Fourier phase of the original signal is restored in the joint power spectrum of the smeared image and the smearing function. The correct Fourier amplitude of the original signal is restored by essentially dividing out the Fourier amplitude of the smearing function from the joint power spectrum. The division is achieved by subtracting the log.sub.e of the power spectrum of the smearing function from the log.sub.e of the joint power spectrum followed by an exponential nonlinearity.

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Javidi, Bahram, "Image deconvolution by a logarithmic/exponential nonlinear joint transform process", Applied Optics, Feb. 10, 1990, vol. 29, No. 5, pp. 685-690.
Javidi, Bahram et al., "Image deconvolution by nonlinear signal processing", Appl. Optics, vol. 28, No. 15, Aug. 1, 1989, pp. 3106-3111.

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