add workbench autofocus.py

workbench/Readme.md

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+testApps
+--------
+
+this directory contains test applications to analyse data and try basig functionalities.
+
+'scratch' contains quick and dirty basic tests
+
+'testApps' contains clean small applications to tests e.g. image analysis stuff.

workbench/autofocus.py

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+# -*- coding: utf-8 -*-
+"""
+Demonstrate a simple data-slicing task: given 3D data (displayed at top), select
+a 2D plane and interpolate data along that plane to generate a slice image
+(displayed at bottom).
+
+
+"""
+
+## Add path to library (just for examples; you do not need this)
+
+import numpy as np
+from pyqtgraph.Qt import QtCore, QtGui
+import pyqtgraph as pg
+
+app=QtGui.QApplication([])
+
+## Create window with two ImageView widgets
+win=QtGui.QMainWindow()
+win.resize(800, 800)
+win.setWindowTitle('pyqtgraph example: DataSlicing')
+cw=QtGui.QWidget()
+win.setCentralWidget(cw)
+l=QtGui.QGridLayout()
+cw.setLayout(l)
+imv1=pg.ImageView()
+imv2=pg.ImageView()
+l.addWidget(imv1, 0, 0)
+l.addWidget(imv2, 1, 0)
+sld=QtGui.QSlider(QtCore.Qt.Horizontal)
+sld.setMinimum(10)
+sld.setMaximum(30)
+sld.setValue(20)
+sld.setTickPosition(QtGui.QSlider.TicksBelow)
+sld.setTickInterval(5)
+
+l.addWidget(sld, 2, 0)
+win.show()
+
+roi=pg.LineSegmentROI([[10, 64], [120, 64]], pen='r')
+imv1.addItem(roi)
+
+x1=np.linspace(-30, 10, 128)[:, np.newaxis, np.newaxis]
+x2=np.linspace(-20, 20, 128)[:, np.newaxis, np.newaxis]
+y=np.linspace(-30, 10, 128)[np.newaxis, :, np.newaxis]
+z=np.linspace(-20, 20, 128)[np.newaxis, np.newaxis, :]
+d1=np.sqrt(x1**2+y**2+z**2)
+d2=2*np.sqrt(x1[::-1]**2+y**2+z**2)
+d3=4*np.sqrt(x2**2+y[:, ::-1]**2+z**2)
+data=(np.sin(d1)/d1**2)+(np.sin(d2)/d2**2)+(np.sin(d3)/d3**2)
+
+import PIL.Image
+from scipy import ndimage
+import glob
+imgLst=sorted(glob.glob("image*.png"))
+v=np.ndarray(shape=(len(imgLst), 2))
+
+#for i, fn in enumerate(imgLst):
+#    img=PIL.Image.open(fn)
+#    img=np.asarray(img)
+#    s=ndimage.sobel(img)
+#    v[i, 0]=s.sum()
+#    v[i, 1]=s.std()
+  #fig, ax=plt.subplots()
+  #mx=v.max(0)
+  #mn=v.min(0)
+  #v=(v-mn)/(mx-mn)
+  # ax.plot(v[:,0])
+  #ax.plot(v)
+  #plt.show()
+#  pass
+
+
+def update():
+  global data, imv1, imv2, imgLst
+  d2=roi.getArrayRegion(data, imv1.imageItem, axes=(1, 2))
+  imv2.setImage(d2)
+
+
+roi.sigRegionChanged.connect(update)
+
+## Display the data
+imv1.setImage(data)
+imv1.setHistogramRange(-0.01, 0.01)
+imv1.setLevels(-0.003, 0.003)
+
+update()
+
+## Start Qt event loop unless running in interactive mode.
+if __name__=='__main__':
+  import sys
+
+  if (sys.flags.interactive!=1) or not hasattr(QtCore, 'PYQT_VERSION'):
+    QtGui.QApplication.instance().exec_()