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I am working in digital image restoration field, recently i am studying a paper Blur-Kernel Estimation from Spectral Irregularities, in this paper i have got some terms, which i am unable to understand, can anyone please provide me specific description of these terms. [i have already google it, but i didn't get satisfactory answer].

four-point Laplacian filter

The Wiener−Khinchin theorem

Power Spectrum of an image

autocorrelation

Fourier slice theorem

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    $\begingroup$ try to google it $\endgroup$ – iostream007 Jun 4 '13 at 7:38
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    $\begingroup$ Most of these terms are covered very well in Wikipedia and elsewhere - you should probably invest a little more time and effort with your internet searches and then come back if you have any specific unresolved questions. $\endgroup$ – Paul R Jun 4 '13 at 9:38

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