imageview_example.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Thu May 16 22:28:58 2019

@author: martindrech
"""

# -*- coding: utf-8 -*-
"""
Demonstrates very basic use of ImageItem to display image data inside a ViewBox.
"""

## Add path to library (just for examples; you do not need this)

from pyqtgraph.Qt import QtCore, QtGui
import numpy as np
import pyqtgraph as pg
import pyqtgraph.ptime as ptime

def _twoD_gaussian(lim=10, sigma=1, x0=0, y0=0):
    N = 600
    x, y = np.meshgrid(np.linspace(-lim, lim, N), np.linspace(-lim, lim, N))
    d = np.sqrt(5*(x - x0) ** 2 + (y - y0) ** 2)
    g = np.exp(-((d) ** 2 / (2.0 * sigma ** 2)))
    noise = np.random.normal(size=(N, N))/10
    return g + noise 

app = QtGui.QApplication([])

## Create window with ImageView widget
win = QtGui.QMainWindow()
win.resize(800,800)
imv = pg.ImageView()

win.setCentralWidget(imv)
win.show()
win.setWindowTitle('pyqtgraph example: ImageView')



## Create random image
data = np.asarray([_twoD_gaussian() for i in range(50)])
i = 0

updateTime = ptime.time()
fps = 0

def updateData():
    global img, data, i, updateTime, fps

    ## Display the data
    imv.setImage(data[i], autoHistogramRange=False, autoLevels=False,
                 autoRange=False, rot
                 )
    i = (i+1) % data.shape[0]

    QtCore.QTimer.singleShot(1, updateData)
    now = ptime.time()
    fps2 = 1.0 / (now-updateTime)
    updateTime = now
    fps = fps * 0.9 + fps2 * 0.1
    
    #print "%0.1f fps" % fps
    

updateData()

## 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_()