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<!DOCTYPE html>
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<title>dip::Framework::FullLineFilter class | DIPlib | a library for quantitative image analysis</title>
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<a href="https://diplib.org"><img src="DIPlib_logo.svg" alt="" />DIPlib</a><span class="m-breadcrumb">┃</span><a href="index.html" class="m-thin">a library for quantitative image analysis</a><span class="m-breadcrumb">┃</span><a href="https://github.com/DIPlib/diplib/releases/tag/3.5.2" class="m-thin">version 3.5.2</a> </span>
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<h1>
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<a href="frameworks.html" class="m-doc">Frameworks</a> module<br/><span class="m-code m-thin">#include <a href="file--diplib--framework-h.html">"diplib/framework.h"</a></span> </div>
<span class="m-breadcrumb"><a href="dip.html">dip</a>::<wbr/></span><span class="m-breadcrumb"><a href="dip-Framework.html">Framework</a>::<wbr/></span>FullLineFilter <span class="m-thin">class</span> </h1>
<p>Prototype line filter for <a href="frameworks.html#dip-Framework-Full-Image-CL-Image-L-DataType--DataType--DataType--dip-uint--BoundaryConditionArray-CL-Kernel-CL-FullLineFilter-L-FullOptions-"><code>dip::Framework::Full</code></a>.</p>
<div class="m-block m-default">
<h3>Contents</h3>
<ul>
<li>
Reference
<ul>
<li><a href="#typeless-methods">Constructors, destructors, assignment and conversion operators</a></li>
<li><a href="#function-members">Functions</a></li>
</ul>
</li>
</ul>
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<p>An object of a class derived from <code>FullLineFilter</code> must be passed to the full framework. The derived
class can be a template class, such that the line filter is overloaded for each possible pixel data type.</p>
<p>A derived class can have data members that hold parameters to the line filter, that hold output values,
or that hold intermediate buffers. The <code>SetNumberOfThreads</code> method is
called once before any processing starts. This is a good place to allocate space for temporary buffers,
such that each threads has its own buffers to write in. It is also the first place where the line filter
can see what the pixel table looks like (as it depends on the processing dimension determined by the
framework), and so it’s a good place to determine some processing options.
Note that this function is called even if
<a href="frameworks.html#dip-Framework-FullOption-NoMultiThreading"><code>dip::Framework::FullOption::NoMultiThreading</code></a> is given, or if the library is compiled without multi-threading.</p>
<p>The <code>GetNumberOfOperations</code> method is called to determine if it is worthwhile to start worker threads and
perform the computation in parallel. This function should not perform any other tasks, as it is not
guaranteed to be called. It is not important that the function be very precise, see <a href="design.html#design_multithreading">Multithreading</a>.</p>
<section id="typeless-methods">
<h2>Constructors, destructors, assignment and conversion operators</h2>
<dl class="m-doc">
<dt id="dip-Framework-FullLineFilter-~FullLineFilter">
<span class="m-doc-wrap-bumper"><a href="#dip-Framework-FullLineFilter-~FullLineFilter" class="m-doc-self">~FullLineFilter</a>(</span><span class="m-doc-wrap">) <span class="m-label m-flat m-info">defaulted</span> <span class="m-label m-flat m-warning">virtual</span></span>
</dt>
<dd>A virtual destructor guarantees that we can destroy a derived class by a pointer to base</dd>
</dl>
</section>
<section id="function-members">
<h2>Functions</h2>
<dl class="m-doc">
<dt id="dip-Framework-FullLineFilter-Filter-FullLineFilterParameters-CL">
<span class="m-doc-wrap-bumper">void <a href="#dip-Framework-FullLineFilter-Filter-FullLineFilterParameters-CL" class="m-doc-self">Filter</a>(</span><span class="m-doc-wrap"><a href="frameworks.html#dip-Framework-FullLineFilterParameters" class="m-doc">dip::Framework::FullLineFilterParameters</a> const& params) <span class="m-label m-flat m-warning">pure virtual</span></span>
</dt>
<dd>The derived class must must define this method, this is the actual line filter.</dd>
<dt id="dip-Framework-FullLineFilter-SetNumberOfThreads-dip-uint--PixelTableOffsets-CL">
<span class="m-doc-wrap-bumper">void <a href="#dip-Framework-FullLineFilter-SetNumberOfThreads-dip-uint--PixelTableOffsets-CL" class="m-doc-self">SetNumberOfThreads</a>(</span><span class="m-doc-wrap"><a href="supporttypes.html#dip-uint" class="m-doc">dip::uint</a> threads,
<a href="dip-PixelTableOffsets.html" class="m-doc">dip::PixelTableOffsets</a> const& pixelTable) <span class="m-label m-flat m-warning">virtual</span></span>
</dt>
<dd>The derived class can define this function for setting up the processing.</dd>
<dt id="dip-Framework-FullLineFilter-GetNumberOfOperations-dip-uint--dip-uint--dip-uint--dip-uint-">
<span class="m-doc-wrap-bumper">auto <a href="#dip-Framework-FullLineFilter-GetNumberOfOperations-dip-uint--dip-uint--dip-uint--dip-uint-" class="m-doc-self">GetNumberOfOperations</a>(</span><span class="m-doc-wrap"><a href="supporttypes.html#dip-uint" class="m-doc">dip::uint</a> lineLength,
<a href="supporttypes.html#dip-uint" class="m-doc">dip::uint</a> nTensorElements,
<a href="supporttypes.html#dip-uint" class="m-doc">dip::uint</a> nKernelPixels,
<a href="supporttypes.html#dip-uint" class="m-doc">dip::uint</a> nRuns) -> <a href="supporttypes.html#dip-uint" class="m-doc">dip::uint</a> <span class="m-label m-flat m-warning">virtual</span></span>
</dt>
<dd>The derived class can define this function for helping to determine whether to compute
in parallel or not. It must return the number of clock cycles per image line. The default is valid for
a convolution-like operation.</dd>
</dl>
</section>
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