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authorNavan Chauhan <navanchauhan@gmail.com>2020-10-02 19:25:50 +0530
committerNavan Chauhan <navanchauhan@gmail.com>2020-10-02 19:25:50 +0530
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-<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"/><meta name="og:site_name" content="Navan Chauhan"/><link rel="canonical" href="https://navanchauhan.github.io/posts/2020-01-14-Converting-between-PIL-NumPy"/><meta name="twitter:url" content="https://navanchauhan.github.io/posts/2020-01-14-Converting-between-PIL-NumPy"/><meta name="og:url" content="https://navanchauhan.github.io/posts/2020-01-14-Converting-between-PIL-NumPy"/><title>Converting between image and NumPy array | Navan Chauhan</title><meta name="twitter:title" content="Converting between image and NumPy array | Navan Chauhan"/><meta name="og:title" content="Converting between image and NumPy array | Navan Chauhan"/><meta name="description" content="Short code snippet for converting between PIL image and NumPy arrays."/><meta name="twitter:description" content="Short code snippet for converting between PIL image and NumPy arrays."/><meta name="og:description" content="Short code snippet for converting between PIL image and NumPy arrays."/><meta name="twitter:card" content="summary"/><link rel="stylesheet" href="/styles.css" type="text/css"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><link rel="shortcut icon" href="/images/favicon.png" type="image/png"/><link rel="alternate" href="/feed.rss" type="application/rss+xml" title="Subscribe to Navan Chauhan"/><meta name="twitter:image" content="https://navanchauhan.github.io/images/logo.png"/><meta name="og:image" content="https://navanchauhan.github.io/images/logo.png"/></head><head><script>var _paq=window._paq=window._paq||[];_paq.push(['trackPageView']),_paq.push(['enableLinkTracking']),function(){var a='https://navanspi.duckdns.org:6969/analytics/';_paq.push(['setTrackerUrl',a+'matomo.php']),_paq.push(['setSiteId','2']);var e=document,t=e.createElement('script'),p=e.getElementsByTagName('script')[0];t.type='text/javascript',t.async=!0,t.src=a+'matomo.js',p.parentNode.insertBefore(t,p)}();</script></head><body class="item-page"><header><div class="wrapper"><a class="site-name" href="/">Navan Chauhan</a><nav><ul><li><a href="/about">About Me</a></li><li><a class="selected" href="/posts">Posts</a></li><li><a href="/publications">Publications</a></li><li><a href="/assets/résumé.pdf">Résumé</a></li><li><a href="https://navanchauhan.github.io/repo">Repo</a></li></ul></nav></div></header><div class="wrapper"><article><div class="content"><span class="reading-time">1 minute read</span><span class="reading-time">Created on January 14, 2020</span><span class="reading-time">Last modified on June 1, 2020</span><h1>Converting between image and NumPy array</h1><pre><code><div class="highlight"><span></span><span class="kn">import</span> <span class="nn">numpy</span>
-<span class="kn">import</span> <span class="nn">PIL</span>
-
-<span class="c1"># Convert PIL Image to NumPy array</span>
-<span class="n">img</span> <span class="o">=</span> <span class="n">PIL</span><span class="o">.</span><span class="n">Image</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="s2">&quot;foo.jpg&quot;</span><span class="p">)</span>
-<span class="n">arr</span> <span class="o">=</span> <span class="n">numpy</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">img</span><span class="p">)</span>
-
-<span class="c1"># Convert array to Image</span>
-<span class="n">img</span> <span class="o">=</span> <span class="n">PIL</span><span class="o">.</span><span class="n">Image</span><span class="o">.</span><span class="n">fromarray</span><span class="p">(</span><span class="n">arr</span><span class="p">)</span>
-</div></code></pre><h2>Saving an Image</h2><pre><code><div class="highlight"><span></span><span class="k">try</span><span class="p">:</span>
- <span class="n">img</span><span class="o">.</span><span class="n">save</span><span class="p">(</span><span class="n">destination</span><span class="p">,</span> <span class="s2">&quot;JPEG&quot;</span><span class="p">,</span> <span class="n">quality</span><span class="o">=</span><span class="mi">80</span><span class="p">,</span> <span class="n">optimize</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">progressive</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
-<span class="k">except</span> <span class="ne">IOError</span><span class="p">:</span>
- <span class="n">PIL</span><span class="o">.</span><span class="n">ImageFile</span><span class="o">.</span><span class="n">MAXBLOCK</span> <span class="o">=</span> <span class="n">img</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">*</span> <span class="n">img</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
- <span class="n">img</span><span class="o">.</span><span class="n">save</span><span class="p">(</span><span class="n">destination</span><span class="p">,</span> <span class="s2">&quot;JPEG&quot;</span><span class="p">,</span> <span class="n">quality</span><span class="o">=</span><span class="mi">80</span><span class="p">,</span> <span class="n">optimize</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">progressive</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
-</div></code></pre></div><span>Tagged with: </span><ul class="tag-list"><li><a href="/tags/codesnippet">Code-Snippet</a></li><li><a href="/tags/tutorial">Tutorial</a></li></ul></article></div><footer><p>Made with ❤️ using <a href="https://github.com/johnsundell/publish">Publish</a></p><p><a href="/feed.rss">RSS feed</a></p></footer></body></html> \ No newline at end of file
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