71 lines
2.1 KiB
Python
71 lines
2.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
This example demonstrates the use of ImageView, which is a high-level widget for
|
|
displaying and analyzing 2D and 3D data. ImageView provides:
|
|
|
|
1. A zoomable region (ViewBox) for displaying the image
|
|
2. A combination histogram and gradient editor (HistogramLUTItem) for
|
|
controlling the visual appearance of the image
|
|
3. A timeline for selecting the currently displayed frame (for 3D data only).
|
|
4. Tools for very basic analysis of image data (see ROI and Norm buttons)
|
|
|
|
"""
|
|
## Add path to library (just for examples; you do not need this)
|
|
import initExample
|
|
|
|
import numpy as np
|
|
from pyqtgraph.Qt import QtCore, QtGui
|
|
import pyqtgraph as pg
|
|
|
|
# Interpret image data as row-major instead of col-major
|
|
pg.setConfigOptions(imageAxisOrder='row-major')
|
|
|
|
app = pg.mkQApp("ImageView Example")
|
|
|
|
## 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 3D data set with noisy signals
|
|
img = pg.gaussianFilter(np.random.normal(size=(200, 200)), (5, 5)) * 20 + 100
|
|
img = img[np.newaxis,:,:]
|
|
decay = np.exp(-np.linspace(0,0.3,100))[:,np.newaxis,np.newaxis]
|
|
data = np.random.normal(size=(100, 200, 200))
|
|
data += img * decay
|
|
data += 2
|
|
|
|
## Add time-varying signal
|
|
sig = np.zeros(data.shape[0])
|
|
sig[30:] += np.exp(-np.linspace(1,10, 70))
|
|
sig[40:] += np.exp(-np.linspace(1,10, 60))
|
|
sig[70:] += np.exp(-np.linspace(1,10, 30))
|
|
|
|
sig = sig[:,np.newaxis,np.newaxis] * 3
|
|
data[:,50:60,30:40] += sig
|
|
|
|
|
|
## Display the data and assign each frame a time value from 1.0 to 3.0
|
|
imv.setImage(data, xvals=np.linspace(1., 3., data.shape[0]))
|
|
|
|
## Set a custom color map
|
|
colors = [
|
|
(0, 0, 0),
|
|
(45, 5, 61),
|
|
(84, 42, 55),
|
|
(150, 87, 60),
|
|
(208, 171, 141),
|
|
(255, 255, 255)
|
|
]
|
|
cmap = pg.ColorMap(pos=np.linspace(0.0, 1.0, 6), color=colors)
|
|
imv.setColorMap(cmap)
|
|
|
|
## 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_()
|