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<p>Math operations for IP algorithms.
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Functions</h2></td></tr>
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double </td><td class="memItemRight" valign="bottom"><a class="el" href="group___image_processing_math.html#gaaa4583e6d012a8b49ad1738cec762651">lanczos</a> (double x, std::ptrdiff_t a)</td></tr>
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<tr class="memdesc:gaaa4583e6d012a8b49ad1738cec762651"><td class="mdescLeft"> </td><td class="mdescRight">Lanczos response at point xLanczos response is defined as: x == 0: 1 -a < x && x < a: 0 otherwise: normalized_sinc(x) / normalized_sinc(x / a) <br /></td></tr>
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<p>Math operations for IP algorithms. </p>
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<p>This is mostly handful of mathemtical operations that are required by other image processing algorithms</p>
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<p>Normalized cardinal sine</p>
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<p>normalized_sinc(x) = sin(pi * x) / (pi * x) </p>
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