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 GR32_Resamplers
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TWindowedSincKernel
Hierarchy
TPersistent
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Description
Returns the value of the Sinc function constrained by a window function. Descendant classes override the Window method in order to implement a custom window function.
h(x) = Sinc(x) * Window(x);
Windowed Sinc filters are known for producing high quality resampled images. Ideal resampling corresponds to filtering an image with the ideal low-pass filter (i.e. a Sinc filter). This is computionally expensive, since the Sinc function has infinite extent. Hence a window function is used to constrain the filter.
See topic about Sampling and Rasterization for further information.
Reference
| Properties | Methods |
|---|---|
| In TWindowedSincKernel: | |
| Width | Create |
| Filter | |
| GetWidth | |
| SetWidth | |
| In TCustomKernel: | |
| Observer | Changed |
| RangeCheck | |
See Also
Kernel Example, Resampler Example, Sampling and Rasterization, Window
Copyright ©2000-2007 Alex Denisov and Contributors - Graphics32 v1.8.3 - Build on 4-March-2007