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<div class="section" id="imageitem">
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<h1>ImageItem<a class="headerlink" href="#imageitem" title="Permalink to this headline">¶</a></h1>
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<dl class="class">
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<dt id="pyqtgraph.ImageItem">
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<em class="property">class </em><tt class="descclassname">pyqtgraph.</tt><tt class="descname">ImageItem</tt><big>(</big><em>image=None</em>, <em>**kargs</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageItem" title="Permalink to this definition">¶</a></dt>
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<dd><p>GraphicsObject displaying an image. Optimized for rapid update (ie video display)</p>
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<dl class="method">
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<dt id="pyqtgraph.ImageItem.__init__">
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<tt class="descname">__init__</tt><big>(</big><em>image=None</em>, <em>**kargs</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageItem.__init__" title="Permalink to this definition">¶</a></dt>
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<dd><p>See setImage for all allowed arguments.</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ImageItem.getHistogram">
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<tt class="descname">getHistogram</tt><big>(</big><em>bins=500</em>, <em>step=3</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageItem.getHistogram" title="Permalink to this definition">¶</a></dt>
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<dd><p>returns x and y arrays containing the histogram values for the current image.
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The step argument causes pixels to be skipped when computing the histogram to save time.</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ImageItem.pixelSize">
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<tt class="descname">pixelSize</tt><big>(</big><big>)</big><a class="headerlink" href="#pyqtgraph.ImageItem.pixelSize" title="Permalink to this definition">¶</a></dt>
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<dd><p>return scene-size of a single pixel in the image</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ImageItem.setImage">
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<tt class="descname">setImage</tt><big>(</big><em>image=None</em>, <em>autoLevels=None</em>, <em>**kargs</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageItem.setImage" title="Permalink to this definition">¶</a></dt>
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<dd><p>Update the image displayed by this item.
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Arguments:</p>
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<blockquote>
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image
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autoLevels
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lut
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levels
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opacity
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compositionMode
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border</blockquote>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ImageItem.setLevels">
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<tt class="descname">setLevels</tt><big>(</big><em>levels</em>, <em>update=True</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageItem.setLevels" title="Permalink to this definition">¶</a></dt>
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<dd><dl class="docutils">
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<dt>Set image scaling levels. Can be one of: </dt>
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<dd>[blackLevel, whiteLevel]
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[[minRed, maxRed], [minGreen, maxGreen], [minBlue, maxBlue]]</dd>
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<p>Only the first format is compatible with lookup tables.</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ImageItem.setLookupTable">
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<tt class="descname">setLookupTable</tt><big>(</big><em>lut</em>, <em>update=True</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageItem.setLookupTable" title="Permalink to this definition">¶</a></dt>
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<dd><p>Set the lookup table to use for this image. (see functions.makeARGB for more information on how this is used)
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Optionally, lut can be a callable that accepts the current image as an argument and returns the lookup table to use.</p>
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<dl class="method">
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<dt id="pyqtgraph.ImageItem.setPxMode">
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<tt class="descname">setPxMode</tt><big>(</big><em>b</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageItem.setPxMode" title="Permalink to this definition">¶</a></dt>
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<dd><p>Set whether the item ignores transformations and draws directly to screen pixels.</p>
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