removed some extra files
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Luke Campagnola
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269374ef84
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@ -1,8 +0,0 @@
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ImageView
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=========
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.. autoclass:: pyqtgraph.ImageView
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:members:
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.. automethod:: pyqtgraph.ImageView.__init__
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@ -1,158 +0,0 @@
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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|
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
|
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
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|
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<title>ImageView — pyqtgraph v1.8 documentation</title>
|
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<link rel="stylesheet" href="../_static/default.css" type="text/css" />
|
||||
<link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
|
||||
<script type="text/javascript">
|
||||
var DOCUMENTATION_OPTIONS = {
|
||||
URL_ROOT: '../',
|
||||
VERSION: '1.8',
|
||||
COLLAPSE_INDEX: false,
|
||||
FILE_SUFFIX: '.html',
|
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HAS_SOURCE: true
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||||
};
|
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</script>
|
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<script type="text/javascript" src="../_static/jquery.js"></script>
|
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<script type="text/javascript" src="../_static/underscore.js"></script>
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<script type="text/javascript" src="../_static/doctools.js"></script>
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<link rel="top" title="pyqtgraph v1.8 documentation" href="../index.html" />
|
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<link rel="up" title="Pyqtgraph’s Widgets" href="index.html" />
|
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<link rel="next" title="DataTreeWidget" href="datatreewidget.html" />
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<link rel="prev" title="PlotWidget" href="plotwidget.html" />
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</head>
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<h3>Navigation</h3>
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<ul>
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accesskey="I">index</a></li>
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<li class="right" >
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<a href="../py-modindex.html" title="Python Module Index"
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>modules</a> |</li>
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<li class="right" >
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<a href="datatreewidget.html" title="DataTreeWidget"
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accesskey="N">next</a> |</li>
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<div class="document">
|
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<div class="documentwrapper">
|
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<div class="bodywrapper">
|
||||
<div class="body">
|
||||
|
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<div class="section" id="imageview">
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<h1>ImageView<a class="headerlink" href="#imageview" title="Permalink to this headline">¶</a></h1>
|
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<dl class="class">
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<dt id="pyqtgraph.ImageView">
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<em class="property">class </em><tt class="descclassname">pyqtgraph.</tt><tt class="descname">ImageView</tt><big>(</big><em>parent=None</em>, <em>name='ImageView'</em>, <em>*args</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageView" title="Permalink to this definition">¶</a></dt>
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<dd><dl class="method">
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<dt id="pyqtgraph.ImageView.__init__">
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<tt class="descname">__init__</tt><big>(</big><em>parent=None</em>, <em>name='ImageView'</em>, <em>*args</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageView.__init__" title="Permalink to this definition">¶</a></dt>
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<dd></dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ImageView.jumpFrames">
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<tt class="descname">jumpFrames</tt><big>(</big><em>n</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageView.jumpFrames" title="Permalink to this definition">¶</a></dt>
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<dd><p>If this is a video, move ahead n frames</p>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ImageView.setImage">
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<tt class="descname">setImage</tt><big>(</big><em>img</em>, <em>autoRange=True</em>, <em>autoLevels=True</em>, <em>levels=None</em>, <em>axes=None</em>, <em>xvals=None</em>, <em>pos=None</em>, <em>scale=None</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageView.setImage" title="Permalink to this definition">¶</a></dt>
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<dd><p>Set the image to be displayed in the widget.
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Options are:</p>
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<blockquote>
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<p>img: ndarray; the image to be displayed.
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autoRange: bool; whether to scale/pan the view to fit the image.
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autoLevels: bool; whether to update the white/black levels to fit the image.
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levels: (min, max); the white and black level values to use.
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axes: {‘t’:0, ‘x’:1, ‘y’:2, ‘c’:3}; Dictionary indicating the interpretation for each axis.</p>
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<blockquote>
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This is only needed to override the default guess.</blockquote>
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</blockquote>
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</dd></dl>
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<dl class="method">
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<dt id="pyqtgraph.ImageView.timeIndex">
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<tt class="descname">timeIndex</tt><big>(</big><em>slider</em><big>)</big><a class="headerlink" href="#pyqtgraph.ImageView.timeIndex" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the time and frame index indicated by a slider</p>
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</dd></dl>
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|
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</dd></dl>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
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</div>
|
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</div>
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<div class="sphinxsidebar">
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<div class="sphinxsidebarwrapper">
|
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<h4>Previous topic</h4>
|
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<p class="topless"><a href="plotwidget.html"
|
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title="previous chapter">PlotWidget</a></p>
|
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<h4>Next topic</h4>
|
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<p class="topless"><a href="datatreewidget.html"
|
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title="next chapter">DataTreeWidget</a></p>
|
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<h3>This Page</h3>
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<ul class="this-page-menu">
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<li><a href="../_sources/widgets/imageview.txt"
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rel="nofollow">Show Source</a></li>
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Enter search terms or a module, class or function name.
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<ul>
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<li class="right" style="margin-right: 10px">
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<a href="../genindex.html" title="General Index"
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>index</a></li>
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<li class="right" >
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<a href="../py-modindex.html" title="Python Module Index"
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>modules</a> |</li>
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<li class="right" >
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<a href="datatreewidget.html" title="DataTreeWidget"
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>next</a> |</li>
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<li class="right" >
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<a href="plotwidget.html" title="PlotWidget"
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>previous</a> |</li>
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<li><a href="../index.html">pyqtgraph v1.8 documentation</a> »</li>
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<li><a href="../apireference.html" >API Reference</a> »</li>
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<li><a href="index.html" >Pyqtgraph’s Widgets</a> »</li>
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<div class="footer">
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© Copyright 2011, Luke Campagnola.
|
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Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.0.1.
|
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</div>
|
||||
</body>
|
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</html>
|
||||
@ -1,398 +0,0 @@
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from pyqtgraph.Qt import QtGui, QtCore
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import numpy as np
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try:
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import scipy.weave as weave
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from scipy.weave import converters
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except:
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pass
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import pyqtgraph.functions as fn
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import pyqtgraph.debug as debug
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from GraphicsObject import GraphicsObject
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__all__ = ['ImageItem']
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class ImageItem(GraphicsObject):
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"""
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GraphicsObject displaying an image. Optimized for rapid update (ie video display)
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"""
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sigImageChanged = QtCore.Signal()
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## performance gains from this are marginal, and it's rather unreliable.
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useWeave = False
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def __init__(self, image=None, copy=True, parent=None, border=None, mode=None, *args):
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#QObjectWorkaround.__init__(self)
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GraphicsObject.__init__(self)
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#self.pixmapItem = QtGui.QGraphicsPixmapItem(self)
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self.qimage = QtGui.QImage()
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self.pixmap = None
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self.paintMode = mode
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#self.useWeave = True
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self.blackLevel = None
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self.whiteLevel = None
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self.alpha = 1.0
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self.image = None
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self.clipLevel = None
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self.drawKernel = None
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if border is not None:
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border = fn.mkPen(border)
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self.border = border
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#QtGui.QGraphicsPixmapItem.__init__(self, parent, *args)
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#self.pixmapItem = QtGui.QGraphicsPixmapItem(self)
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if image is not None:
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self.updateImage(image, copy, autoRange=True)
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#self.setCacheMode(QtGui.QGraphicsItem.DeviceCoordinateCache)
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#self.item = QtGui.QGraphicsPixmapItem(parent=self)
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def setCompositionMode(self, mode):
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self.paintMode = mode
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self.update()
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def setAlpha(self, alpha):
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self.alpha = alpha
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self.updateImage()
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#def boundingRect(self):
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#return self.pixmapItem.boundingRect()
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#return QtCore.QRectF(0, 0, self.qimage.width(), self.qimage.height())
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def width(self):
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if self.pixmap is None:
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return None
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return self.pixmap.width()
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def height(self):
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if self.pixmap is None:
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return None
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return self.pixmap.height()
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def boundingRect(self):
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if self.pixmap is None:
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return QtCore.QRectF(0., 0., 0., 0.)
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return QtCore.QRectF(0., 0., float(self.width()), float(self.height()))
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def setClipLevel(self, level=None):
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self.clipLevel = level
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#def paint(self, p, opt, widget):
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#pass
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#if self.pixmap is not None:
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#p.drawPixmap(0, 0, self.pixmap)
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#print "paint"
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def setLevels(self, white=None, black=None):
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if white is not None:
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self.whiteLevel = white
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if black is not None:
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self.blackLevel = black
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self.updateImage()
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def getLevels(self):
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return self.whiteLevel, self.blackLevel
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def updateImage(self, *args, **kargs):
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## can we make any assumptions here that speed things up?
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## dtype, range, size are all the same?
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defaults = {
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'autoRange': False,
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}
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defaults.update(kargs)
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return self.setImage(*args, **defaults)
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def setImage(self, image=None, copy=True, autoRange=True, clipMask=None, white=None, black=None, axes=None):
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prof = debug.Profiler('ImageItem.updateImage 0x%x' %id(self))
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#debug.printTrace()
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if axes is None:
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axh = {'x': 0, 'y': 1, 'c': 2}
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else:
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axh = axes
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#print "Update image", black, white
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if white is not None:
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self.whiteLevel = white
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if black is not None:
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self.blackLevel = black
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gotNewData = False
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if image is None:
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if self.image is None:
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return
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else:
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gotNewData = True
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if self.image is None or image.shape != self.image.shape:
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self.prepareGeometryChange()
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if copy:
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self.image = image.view(np.ndarray).copy()
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else:
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self.image = image.view(np.ndarray)
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#print " image max:", self.image.max(), "min:", self.image.min()
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prof.mark('1')
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# Determine scale factors
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if autoRange or self.blackLevel is None:
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if self.image.dtype is np.ubyte:
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self.blackLevel = 0
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self.whiteLevel = 255
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else:
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self.blackLevel = self.image.min()
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self.whiteLevel = self.image.max()
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#print "Image item using", self.blackLevel, self.whiteLevel
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if self.blackLevel != self.whiteLevel:
|
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scale = 255. / (self.whiteLevel - self.blackLevel)
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else:
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scale = 0.
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prof.mark('2')
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## Recolor and convert to 8 bit per channel
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# Try using weave, then fall back to python
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shape = self.image.shape
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black = float(self.blackLevel)
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white = float(self.whiteLevel)
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if black == 0 and white == 255 and self.image.dtype == np.ubyte:
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im = self.image
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elif self.image.dtype in [np.ubyte, np.uint16]:
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# use lookup table instead
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npts = 2**(self.image.itemsize * 8)
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lut = self.getLookupTable(npts, black, white)
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im = lut[self.image]
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else:
|
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im = self.applyColorScaling(self.image, black, scale)
|
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|
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prof.mark('3')
|
||||
|
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try:
|
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im1 = np.empty((im.shape[axh['y']], im.shape[axh['x']], 4), dtype=np.ubyte)
|
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except:
|
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print im.shape, axh
|
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raise
|
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alpha = np.clip(int(255 * self.alpha), 0, 255)
|
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prof.mark('4')
|
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# Fill image
|
||||
if im.ndim == 2:
|
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im2 = im.transpose(axh['y'], axh['x'])
|
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im1[..., 0] = im2
|
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im1[..., 1] = im2
|
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im1[..., 2] = im2
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im1[..., 3] = alpha
|
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elif im.ndim == 3: #color image
|
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im2 = im.transpose(axh['y'], axh['x'], axh['c'])
|
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if im2.shape[2] > 4:
|
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raise Exception("ImageItem got image with more than 4 color channels (shape is %s; axes are %s)" % (str(im.shape), str(axh)))
|
||||
## [B G R A] Reorder colors
|
||||
order = [2,1,0,3] ## for some reason, the colors line up as BGR in the final image.
|
||||
|
||||
for i in range(0, im.shape[axh['c']]):
|
||||
im1[..., order[i]] = im2[..., i]
|
||||
|
||||
## fill in unused channels with 0 or alpha
|
||||
for i in range(im.shape[axh['c']], 3):
|
||||
im1[..., i] = 0
|
||||
if im.shape[axh['c']] < 4:
|
||||
im1[..., 3] = alpha
|
||||
|
||||
else:
|
||||
raise Exception("Image must be 2 or 3 dimensions")
|
||||
#self.im1 = im1
|
||||
# Display image
|
||||
prof.mark('5')
|
||||
if self.clipLevel is not None or clipMask is not None:
|
||||
if clipMask is not None:
|
||||
mask = clipMask.transpose()
|
||||
else:
|
||||
mask = (self.image < self.clipLevel).transpose()
|
||||
im1[..., 0][mask] *= 0.5
|
||||
im1[..., 1][mask] *= 0.5
|
||||
im1[..., 2][mask] = 255
|
||||
prof.mark('6')
|
||||
#print "Final image:", im1.dtype, im1.min(), im1.max(), im1.shape
|
||||
self.ims = im1.tostring() ## Must be held in memory here because qImage won't do it for us :(
|
||||
prof.mark('7')
|
||||
qimage = QtGui.QImage(buffer(self.ims), im1.shape[1], im1.shape[0], QtGui.QImage.Format_ARGB32)
|
||||
prof.mark('8')
|
||||
self.pixmap = QtGui.QPixmap.fromImage(qimage)
|
||||
prof.mark('9')
|
||||
##del self.ims
|
||||
#self.item.setPixmap(self.pixmap)
|
||||
|
||||
self.update()
|
||||
prof.mark('10')
|
||||
|
||||
if gotNewData:
|
||||
#self.emit(QtCore.SIGNAL('imageChanged'))
|
||||
self.sigImageChanged.emit()
|
||||
|
||||
prof.finish()
|
||||
|
||||
def getLookupTable(self, num, black, white):
|
||||
num = int(num)
|
||||
black = int(black)
|
||||
white = int(white)
|
||||
if white < black:
|
||||
b = black
|
||||
black = white
|
||||
white = b
|
||||
key = (num, black, white)
|
||||
lut = np.empty(num, dtype=np.ubyte)
|
||||
lut[:black] = 0
|
||||
rng = lut[black:white]
|
||||
try:
|
||||
rng[:] = np.linspace(0, 255, white-black)[:len(rng)]
|
||||
except:
|
||||
print key, rng.shape
|
||||
lut[white:] = 255
|
||||
return lut
|
||||
|
||||
|
||||
def applyColorScaling(self, img, offset, scale):
|
||||
try:
|
||||
if not ImageItem.useWeave:
|
||||
raise Exception('Skipping weave compile')
|
||||
#sim = np.ascontiguousarray(self.image) ## should not be needed
|
||||
sim = img.reshape(img.size)
|
||||
#sim.shape = sim.size
|
||||
im = np.empty(sim.shape, dtype=np.ubyte)
|
||||
n = im.size
|
||||
|
||||
code = """
|
||||
for( int i=0; i<n; i++ ) {
|
||||
float a = (sim(i)-offset) * (float)scale;
|
||||
if( a > 255.0 )
|
||||
a = 255.0;
|
||||
else if( a < 0.0 )
|
||||
a = 0.0;
|
||||
im(i) = a;
|
||||
}
|
||||
"""
|
||||
|
||||
weave.inline(code, ['sim', 'im', 'n', 'offset', 'scale'], type_converters=converters.blitz, compiler = 'gcc')
|
||||
#sim.shape = shape
|
||||
im.shape = img.shape
|
||||
except:
|
||||
if ImageItem.useWeave:
|
||||
ImageItem.useWeave = False
|
||||
#sys.excepthook(*sys.exc_info())
|
||||
#print "=============================================================================="
|
||||
#print "Weave compile failed, falling back to slower version."
|
||||
#img.shape = shape
|
||||
im = ((img - offset) * scale).clip(0.,255.).astype(np.ubyte)
|
||||
return im
|
||||
|
||||
|
||||
def getPixmap(self):
|
||||
return self.pixmap.copy()
|
||||
|
||||
def getHistogram(self, bins=500, step=3):
|
||||
"""returns x and y arrays containing the histogram values for the current image.
|
||||
The step argument causes pixels to be skipped when computing the histogram to save time."""
|
||||
if self.image is None:
|
||||
return None,None
|
||||
stepData = self.image[::step, ::step]
|
||||
hist = np.histogram(stepData, bins=bins)
|
||||
return hist[1][:-1], hist[0]
|
||||
|
||||
def setPxMode(self, b):
|
||||
"""Set whether the item ignores transformations and draws directly to screen pixels."""
|
||||
self.setFlag(self.ItemIgnoresTransformations, b)
|
||||
|
||||
def setScaledMode(self):
|
||||
self.setPxMode(False)
|
||||
|
||||
def mousePressEvent(self, ev):
|
||||
if self.drawKernel is not None and ev.button() == QtCore.Qt.LeftButton:
|
||||
self.drawAt(ev.pos(), ev)
|
||||
ev.accept()
|
||||
else:
|
||||
ev.ignore()
|
||||
|
||||
def mouseMoveEvent(self, ev):
|
||||
#print "mouse move", ev.pos()
|
||||
if self.drawKernel is not None:
|
||||
self.drawAt(ev.pos(), ev)
|
||||
|
||||
def mouseReleaseEvent(self, ev):
|
||||
pass
|
||||
|
||||
def tabletEvent(self, ev):
|
||||
print ev.device()
|
||||
print ev.pointerType()
|
||||
print ev.pressure()
|
||||
|
||||
def drawAt(self, pos, ev=None):
|
||||
pos = [int(pos.x()), int(pos.y())]
|
||||
dk = self.drawKernel
|
||||
kc = self.drawKernelCenter
|
||||
sx = [0,dk.shape[0]]
|
||||
sy = [0,dk.shape[1]]
|
||||
tx = [pos[0] - kc[0], pos[0] - kc[0]+ dk.shape[0]]
|
||||
ty = [pos[1] - kc[1], pos[1] - kc[1]+ dk.shape[1]]
|
||||
|
||||
for i in [0,1]:
|
||||
dx1 = -min(0, tx[i])
|
||||
dx2 = min(0, self.image.shape[0]-tx[i])
|
||||
tx[i] += dx1+dx2
|
||||
sx[i] += dx1+dx2
|
||||
|
||||
dy1 = -min(0, ty[i])
|
||||
dy2 = min(0, self.image.shape[1]-ty[i])
|
||||
ty[i] += dy1+dy2
|
||||
sy[i] += dy1+dy2
|
||||
|
||||
#print sx
|
||||
#print sy
|
||||
#print tx
|
||||
#print ty
|
||||
#print self.image.shape
|
||||
#print self.image[tx[0]:tx[1], ty[0]:ty[1]].shape
|
||||
#print dk[sx[0]:sx[1], sy[0]:sy[1]].shape
|
||||
ts = (slice(tx[0],tx[1]), slice(ty[0],ty[1]))
|
||||
ss = (slice(sx[0],sx[1]), slice(sy[0],sy[1]))
|
||||
#src = dk[sx[0]:sx[1], sy[0]:sy[1]]
|
||||
#mask = self.drawMask[sx[0]:sx[1], sy[0]:sy[1]]
|
||||
mask = self.drawMask
|
||||
src = dk
|
||||
#print self.image[ts].shape, src.shape
|
||||
|
||||
if callable(self.drawMode):
|
||||
self.drawMode(dk, self.image, mask, ss, ts, ev)
|
||||
else:
|
||||
src = src[ss]
|
||||
if self.drawMode == 'set':
|
||||
if mask is not None:
|
||||
mask = mask[ss]
|
||||
self.image[ts] = self.image[ts] * (1-mask) + src * mask
|
||||
else:
|
||||
self.image[ts] = src
|
||||
elif self.drawMode == 'add':
|
||||
self.image[ts] += src
|
||||
else:
|
||||
raise Exception("Unknown draw mode '%s'" % self.drawMode)
|
||||
self.updateImage()
|
||||
|
||||
def setDrawKernel(self, kernel=None, mask=None, center=(0,0), mode='set'):
|
||||
self.drawKernel = kernel
|
||||
self.drawKernelCenter = center
|
||||
self.drawMode = mode
|
||||
self.drawMask = mask
|
||||
|
||||
def paint(self, p, *args):
|
||||
|
||||
#QtGui.QGraphicsPixmapItem.paint(self, p, *args)
|
||||
if self.pixmap is None:
|
||||
return
|
||||
if self.paintMode is not None:
|
||||
p.setCompositionMode(self.paintMode)
|
||||
p.drawPixmap(self.boundingRect(), self.pixmap, QtCore.QRectF(0, 0, self.pixmap.width(), self.pixmap.height()))
|
||||
if self.border is not None:
|
||||
p.setPen(self.border)
|
||||
p.drawRect(self.boundingRect())
|
||||
|
||||
def pixelSize(self):
|
||||
"""return size of a single pixel in the image"""
|
||||
br = self.sceneBoundingRect()
|
||||
return br.width()/self.pixmap.width(), br.height()/self.pixmap.height()
|
||||
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Reference in New Issue
Block a user