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<title>Image Thumbnail — Matplotlib 2.0.2.post4416.dev0+g1df513f documentation</title>
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<span id="sphx-glr-gallery-misc-image-thumbnail-sgskip-py"></span><h1>Image Thumbnail<a class="headerlink" href="#image-thumbnail" title="Permalink to this headline">¶</a></h1>
<p>You can use matplotlib to generate thumbnails from existing images.
matplotlib natively supports PNG files on the input side, and other
image types transparently if your have PIL installed</p>
<div class="highlight-python"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">print_function</span>
<span class="c1"># build thumbnails of all images in a directory</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">glob</span>
<span class="kn">import</span> <span class="nn">matplotlib.image</span> <span class="kn">as</span> <span class="nn">image</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">2</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s1">'Usage: python </span><span class="si">%s</span><span class="s1"> IMAGEDIR'</span> <span class="o">%</span> <span class="n">__file__</span><span class="p">)</span>
<span class="k">raise</span> <span class="ne">SystemExit</span>
<span class="n">indir</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isdir</span><span class="p">(</span><span class="n">indir</span><span class="p">):</span>
<span class="k">print</span><span class="p">(</span><span class="s1">'Could not find input directory "</span><span class="si">%s</span><span class="s1">"'</span> <span class="o">%</span> <span class="n">indir</span><span class="p">)</span>
<span class="k">raise</span> <span class="ne">SystemExit</span>
<span class="n">outdir</span> <span class="o">=</span> <span class="s1">'thumbs'</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">outdir</span><span class="p">):</span>
<span class="n">os</span><span class="o">.</span><span class="n">makedirs</span><span class="p">(</span><span class="n">outdir</span><span class="p">)</span>
<span class="k">for</span> <span class="n">fname</span> <span class="ow">in</span> <span class="n">glob</span><span class="o">.</span><span class="n">glob</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">indir</span><span class="p">,</span> <span class="s1">'*.png'</span><span class="p">)):</span>
<span class="n">basedir</span><span class="p">,</span> <span class="n">basename</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">fname</span><span class="p">)</span>
<span class="n">outfile</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">outdir</span><span class="p">,</span> <span class="n">basename</span><span class="p">)</span>
<span class="n">fig</span> <span class="o">=</span> <a href="../../api/image_api.html#matplotlib.image.thumbnail" title="View documentation for matplotlib.image.thumbnail"><span class="n">image</span><span class="o">.</span><span class="n">thumbnail</span></a><span class="p">(</span><span class="n">fname</span><span class="p">,</span> <span class="n">outfile</span><span class="p">,</span> <span class="n">scale</span><span class="o">=</span><span class="mf">0.15</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s1">'saved thumbnail of </span><span class="si">%s</span><span class="s1"> to </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">fname</span><span class="p">,</span> <span class="n">outfile</span><span class="p">))</span>
</pre></div>
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