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nvidia-cuda-toolkit-devel-10.1.168-1.2.mga7.nonfree.x86_64.rpm

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<div class="title">Geometry Transforms<div class="ingroups"><a class="el" href="group__nppi.html">NPP Image Processing</a></div></div>  </div>
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<p>Routines manipulating an image geometry.  
<a href="#details">More...</a></p>
<table class="memberdecls">
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Modules</h2></td></tr>
<tr class="memitem:group__image__resize__square__pixel"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__image__resize__square__pixel.html">ResizeSqrPixel</a></td></tr>
<tr class="memdesc:group__image__resize__square__pixel"><td class="mdescLeft">&#160;</td><td class="mdescRight">ResizeSqrPixel supports the following interpolation modes: <br/></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:group__image__resize"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__image__resize.html">Resize</a></td></tr>
<tr class="memdesc:group__image__resize"><td class="mdescLeft">&#160;</td><td class="mdescRight">This simplified function replaces the previous version which was deprecated in an earlier release. <br/></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:group__image__resize__batch"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__image__resize__batch.html">ResizeBatch</a></td></tr>
<tr class="memdesc:group__image__resize__batch"><td class="mdescLeft">&#160;</td><td class="mdescRight">In this function as in nppiResize the resize scale factor is automatically determined by the width and height ratios of oSrcRectROI and oDstRectROI. <br/></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:group__image__remap"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__image__remap.html">Remap</a></td></tr>
<tr class="memdesc:group__image__remap"><td class="mdescLeft">&#160;</td><td class="mdescRight">Remap supports the following interpolation modes: <br/></td></tr>
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<tr class="memitem:group__image__rotate"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__image__rotate.html">Rotate</a></td></tr>
<tr class="memdesc:group__image__rotate"><td class="mdescLeft">&#160;</td><td class="mdescRight">Rotates an image around the origin (0,0) and then shifts it. <br/></td></tr>
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<tr class="memitem:group__image__mirror"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__image__mirror.html">Mirror</a></td></tr>
<tr class="memdesc:group__image__mirror"><td class="mdescLeft">&#160;</td><td class="mdescRight">Mirrors images horizontally, vertically or diagonally. <br/></td></tr>
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<tr class="memitem:group__mirror__batch"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__mirror__batch.html">MirrorBatch</a></td></tr>
<tr class="memdesc:group__mirror__batch"><td class="mdescLeft">&#160;</td><td class="mdescRight">Mirrors batches of images horizontally, vertically or diagonally. <br/></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:group__image__affine__transform"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__image__affine__transform.html">Affine Transforms</a></td></tr>
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<tr class="memitem:group__image__perspective__transforms"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__image__perspective__transforms.html">Perspective Transform</a></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>Routines manipulating an image geometry. </p>
<p>These functions can be found in the nppig library. Linking to only the sub-libraries that you use can significantly save link time, application load time, and CUDA runtime startup time when using dynamic libraries.</p>
<h1><a class="anchor" id="geometric_transform_api"></a>
Geometric Transform API Specifics</h1>
<p>This section covers some of the unique API features common to the geometric transform primitives.</p>
<h2><a class="anchor" id="geometric_transform_roi"></a>
Geometric Transforms and ROIs</h2>
<p>Geometric transforms operate on source and destination ROIs. The way these ROIs affect the processing of pixels differs from other (non geometric) image-processing primitives: Only pixels in the intersection of the destination ROI and the transformed source ROI are being processed.</p>
<p>The typical processing proceedes as follows:</p>
<ol type="1">
<li>Transform the rectangular source ROI (given in source image coordinates) into the destination image space. This yields a quadrilateral.</li>
<li>Write only pixels in the intersection of the transformed source ROI and the destination ROI.</li>
</ol>
<h2><a class="anchor" id="geometric_transforms_interpolation"></a>
Pixel Interpolation</h2>
<p>The majority of image geometry transform operation need to perform a resampling of the source image as source and destination pixels are not coincident.</p>
<p>NPP supports the following pixel inerpolation modes (in order from fastest to slowest and lowest to highest quality):</p>
<ul>
<li>nearest neighbor</li>
<li>linear interpolation</li>
<li>cubic convolution</li>
<li>supersampling</li>
<li>interpolation using Lanczos window function </li>
</ul>
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