https://blog.gtwang.org/tags/openvdb/ Recent content in OpenVDB on G. T. Wang Hugo -- 0.162.0 zh-tw G. T. Wang Tue, 23 Jun 2020 08:20:22 +0800 https://blog.gtwang.org/programming/vtk-openvdb-convert-image-to-vdb-format-tutorial-examples/ Tue, 23 Jun 2020 08:20:22 +0800 https://blog.gtwang.org/programming/vtk-openvdb-convert-image-to-vdb-format-tutorial-examples/ <p>介紹如何使用 VTK 與 OpenVDB 將 VTK ImageData 格式的三維立體影像轉換為 VDB 格式。</p> <p> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-7794009487786811" data-ad-slot="9921134032" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </p> <h2 id="vtk-與-openvdb">VTK 與 OpenVDB</h2> <p>若要將 VTK ImageData 格式（<code>*.vti</code> 檔案）的三維立體影像（volume image）轉換為 VDB 格式，使用 VTK 函式庫讀取影像之後，然後再使用 OpenVDB 函式庫轉為 VDB 的檔案格式，以下是基本的實作程式碼。</p> https://blog.gtwang.org/programming/itk-openvdb-convert-image-to-vdb-format-tutorial-examples/ Fri, 05 Jun 2020 14:36:37 +0800 https://blog.gtwang.org/programming/itk-openvdb-convert-image-to-vdb-format-tutorial-examples/ <p>介紹如何使用 ITK 與 OpenVDB 將三維立體影像轉換為 VDB 格式。</p> <p> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-7794009487786811" data-ad-slot="9921134032" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </p> <h2 id="itk-與-openvdb">ITK 與 OpenVDB</h2> <p>若要將一般的三維立體影像（volume image）轉換為 VDB 格式，可以使用 ITK 函式庫讀取各種三維立體影像，然後再使用 OpenVDB 函式庫轉為 VDB 的檔案格式，以下是基本的實作程式碼。</p> https://blog.gtwang.org/useful-tools/openimageio-image-reading-writing-library-compilation-installation-tutorial/ Tue, 02 Jun 2020 09:16:08 +0800 https://blog.gtwang.org/useful-tools/openimageio-image-reading-writing-library-compilation-installation-tutorial/ <p>介紹如何從原始碼自行編譯並安裝 OpenImageIO 影像讀寫函式庫。</p> <p> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-7794009487786811" data-ad-slot="9921134032" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </p> <h2 id="安裝-cmake">安裝 CMake</h2> <p>首先下載、編譯並安裝最新版的 CMake：</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sh" data-lang="sh"><span class="line"><span class="cl"><span class="c1"># 下載、編譯、安裝 CMake</span> </span></span><span class="line"><span class="cl">wget https://github.com/Kitware/CMake/releases/download/v3.17.3/cmake-3.17.3.tar.gz </span></span><span class="line"><span class="cl">tar zxvf cmake-3.17.3.tar.gz </span></span><span class="line"><span class="cl"><span class="nb">cd</span> cmake-3.17.3 </span></span><span class="line"><span class="cl">./configure </span></span><span class="line"><span class="cl">make -j8 <span class="o">&amp;&amp;</span> sudo make install </span></span></code></pre></div><h2 id="安裝編譯用系統套件">安裝編譯用系統套件</h2> <p>安裝一些編譯 OpenImageIO 所需的系統套件：</p> https://blog.gtwang.org/programming/openvdb-library-compile-install-hello-world-tutorial-examples/ Thu, 21 May 2020 19:47:52 +0800 https://blog.gtwang.org/programming/openvdb-library-compile-install-hello-world-tutorial-examples/ <p>介紹如何從原始碼自行編譯安裝 OpenVDB 函式庫，並編譯一個 hello world 程式。</p> <p> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-7794009487786811" data-ad-slot="9921134032" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </p> <p><a href="https://www.openvdb.org/">OpenVDB</a> 是一套開放原始碼的 C++ 函式庫，提供高效能的三維立體資料（volumetric data）儲存結構與處理工具，以下是 OpenVDB 函式庫的安裝、使用教學與範例。</p>