Image analysis – Image transformation or preprocessing
Reexamination Certificate
2004-09-07
2011-10-04
Lee, John (Department: 2624)
Image analysis
Image transformation or preprocessing
C348S270000, C348S273000, C348S342000, C348S835000, C382S154000, C382S280000
Reexamination Certificate
active
08031969
ABSTRACT:
Methods and apparatuses for selecting appropriate anisotropic filtering levels for images. An image is obtained, that image is Fourier transformed into its frequency components, and then those frequency components are normalized. The Fourier transformed into its frequency components are assigned to Fourier buckets (or bins) having dimensions selected in accord with the number of available anisotropic filtering levels. A predetermined threshold value is used to select one of the Fourier buckets by comparing the predetermined threshold value with the contents of the Fourier buckets. The selected Fourier bucket is used to determine an appropriate anisotropic filtering level for the image. Some embodiments of the present invention can provide for an automatic selection and setting of the appropriate anisotropic filtering level.
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Lee John
NVIDIA Corporation
Patterson & Sheridan LLP
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