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2019-08-05-opencv-code.html
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}</script><script>"serviceWorker"in navigator&&navigator.serviceWorker.getRegistrations().then((function(e){e.map((function(e){e.unregister()}))}))</script><meta name="generator" content="Hexo 7.1.1"></head><body data-instant-intensity="viewport"><header class="header header__no-hero"><div class="header-wrapper"><div class="header__left"><div class="header-logo"><a href="/">BLOG | HDSKY</a></div></div><div class="header__right"><nav class="nav"><a id="nav-toggle" class="nav-toggle"><div></div></a><div class="nav-wrapper"><ul><li><a class="nav-link" href="/links">Link</a></li><li><a class="nav-link" href="/archives">Archive</a></li><li><a class="nav-link" href="/about">About</a></li></ul></div></nav></div></div></header><main class="main"><article class="post"><header class="post-header"><h1 class="post-title">OpenCV的学习笔记</h1><section class="post-meta"><time datetime="2019-08-04T16:10:03.000Z"><i class="far fa-calendar" aria-hidden></i> 2019-08-05</time></section></header><aside class="post-aside"><section class="post-toc"><header class="post-toc-title">Contents</header><ol class="post-toc-inst"><li class="post-toc-inst-item post-toc-inst-level-2"><a class="post-toc-inst-link" href="#%E5%86%99%E5%9C%A8%E5%89%8D%E9%9D%A2"><span class="post-toc-inst-number">1.</span> <span class="post-toc-inst-text">写在前面</span></a></li><li class="post-toc-inst-item post-toc-inst-level-2"><a class="post-toc-inst-link" href="#%E6%A3%80%E6%9F%A5OpenCV%E7%89%88%E6%9C%AC"><span class="post-toc-inst-number">2.</span> <span class="post-toc-inst-text">检查OpenCV版本</span></a></li><li class="post-toc-inst-item post-toc-inst-level-2"><a class="post-toc-inst-link" href="#%E6%89%93%E5%BC%80%E5%9B%BE%E7%89%87"><span class="post-toc-inst-number">3.</span> <span class="post-toc-inst-text">打开图片</span></a></li></ol></section></aside><section class="post-content"><p>最近抽空的时候会做一个图像处理的项目，也算完成以前没有完成的任务，在此记录下一些学习的过程，希望对其他人能够有所帮助。<span id="more"></span></p><p>有关于OpenCV的安装以及其他介绍请参考我以前写的一篇<a href="https://hdsky.pw/2016/12/24/opencv-setup/">《OpenCV的学习之路(一)环境的搭建以及和小伙伴Visual Studio的搞基之旅》</a> 当然那篇文章已经是很久以前写的了，有些地方已经不符合现在的情况，还请谅解。</p><h2 id="写在前面"><a href="#写在前面" class="headerlink" title="写在前面"></a>写在前面</h2><p>这几年伴随着各界对于计算机视觉领域关注，计算机视觉领域已经得到很大的发展，除了OpenCV外，在传统计算机视觉领域还有MATLAB也可以作为开发工具。同时，在深度学习引入到机器视觉后很多人也都转向了使用机器学习。</p><p>OpenCV的很多资料在官方的文档中已经写的很详细了，和很多网上的教程也都基于官方的文档进行拓展，在参考网上教程的时候需要多留意一下OpenCV的版本，OpenCV从我关注开始的2版本到我当时使用的3版本，以及现在的最新版本是4，已近进行了多次迭代，不同版本之间的区别应该不小。</p><p>我目前的开发平台是Ubuntu18.04LTS + Python3.7 + OpenCV4.1.0</p><h2 id="检查OpenCV版本"><a href="#检查OpenCV版本" class="headerlink" title="检查OpenCV版本"></a>检查OpenCV版本</h2><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">#!/usr/bin/env python</span></span><br><span class="line"><span class="keyword">import</span> cv2 <span class="keyword">as</span> cv</span><br><span class="line"><span class="built_in">print</span>(cv.__version__)</span><br></pre></td></tr></table></figure><h2 id="打开图片"><a href="#打开图片" class="headerlink" title="打开图片"></a>打开图片</h2><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">#!/usr/bin/env python</span></span><br><span class="line"><span class="keyword">import</span> numpy <span class="keyword">as</span> np</span><br><span class="line"><span class="keyword">import</span> cv2 <span class="keyword">as</span> cv</span><br><span class="line"></span><br><span class="line"><span class="comment"># Load an color image in grayscale</span></span><br><span class="line">img = cv.imread(<span class="string">'image/j2.jpg'</span>,<span class="number">1</span>)</span><br><span class="line"></span><br><span class="line">cv.imshow(<span class="string">'image'</span>,img)</span><br><span class="line">cv.waitKey(<span class="number">0</span>)</span><br><span class="line">cv.destroyAllWindows()</span><br></pre></td></tr></table></figure></section><footer class="post-meta"><section class="tags"><a href="/tags/%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/"><i class="fas fa-tag" aria-hidden></i> 学习笔记 </a><a href="/tags/OpenCV/"><i class="fas fa-tag" aria-hidden></i> OpenCV</a></section></footer><div class="post-end" data-text="End"></div></article><section><div id="disqus_thread"></div><script>!function(e){window.DISQUS=null;var s=e.createElement("link");s.rel="stylesheet",s.href="https://cdn.jsdelivr.net/npm/[email protected]/dist/disqusjs.css",e.head.appendChild(s);var 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