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  45 <div class="title">DownScalingAlgorithms<div class="ingroups"><a class="el" href="group___scaling_algorithms.html">ScalingAlgorithms</a></div></div>  </div>
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  48
  49 <p>Algorthims suitable for downscaling.
  50 <a href="#details">More...</a></p>
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  52 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
  53 Functions</h2></td></tr>
  54 <tr class="memitem:ga272263cc79c9aa4ecb26687c15f2edf5"><td class="memTemplParams" colspan="2"><a id="ga272263cc79c9aa4ecb26687c15f2edf5"></a>
  55 template&lt;typename ImageView &gt; </td></tr>
  56 <tr class="memitem:ga272263cc79c9aa4ecb26687c15f2edf5"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="group___down_scaling_algorithms.html#ga272263cc79c9aa4ecb26687c15f2edf5">scale_lanczos</a> (ImageView input_view, ImageView output_view, std::ptrdiff_t a)</td></tr>
  57 <tr class="memdesc:ga272263cc79c9aa4ecb26687c15f2edf5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Complete Lanczos algorithmThis algorithm does full pass over resulting image and convolves pixels from original image. Do note that it might be a good idea to have a look at test output as there might be ringing artifacts. Based on wikipedia article: <a href="https://en.wikipedia.org/wiki/Lanczos_resampling">https://en.wikipedia.org/wiki/Lanczos_resampling</a> with standardinzed cardinal sin (sinc) <br /></td></tr>
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  60 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
  61 <p>Algorthims suitable for downscaling. </p>
  62 <p>These algorithms provide best results when used for downscaling. Using for upscaling will probably provide less than good results.</p>
  63 <p>a single step of lanczos downscaling</p>
  64 <p>Use this algorithm to scale down source image into a smaller image with reasonable quality. Do note that having a look at the output once is a good idea, since it might have ringing artifacts. </p>
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