Authenticity proving optical structure, authenticating proof...

Image analysis – Image transformation or preprocessing – Fourier transform

Reexamination Certificate

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Reexamination Certificate

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07885481

ABSTRACT:
An optical structure3having a plurality of minute optical unit areas4is formed on a base2. Each of the minute optical unit areas4has a plurality of minute areas A and B storing depth information representing multiple-valued phase information about a Fourier transformation image obtained through the Fourier transformation of an original image. In another embodiment of the present invention, the two adjacent minute optical unit areas4have a plurality of minute areas A and B storing depth information representing multiple-valued phase information about Fourier transformation images obtained through the Fourier transformation of different original images, respectively.

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Office Action issued in Japanese Patent Application No. 2008-107155 mailed Nov. 5, 2010 (w/English Translation).

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