Loading images

[Patrick Kreitzberg]

Hi,

I am working with a large-ish data set which I currently graph by loading the array into a colormap than loading that array into an imageitem.  My problem is that once I run the data through a colormap and plot the data  ~90 seconds has gone by, and the user may want to select between several data sets all of the same size.  I am hoping to speed that up by reading in an image file that I saved using ImageItem.save().

Can anyone show me an example of how to do this?

I can load the image into a QImage using
qi = QtGui.QImage()
qi.load('./image.png')

But I am not sure how to get the QImage into a plotwidget or similar widget in order to graph the jpg into the QMainWindow.

Thanks

[vas...@gmail.com]

Found the way to load a QImage into the label on GraphicsLayoutWidget.

Cheers,

Vasilije

import pyqtgraph

app = pyqtgraph.QtGui.QApplication([])
win = pyqtgraph.GraphicsLayoutWidget()
qi = pyqtgraph.QtGui.QImage()
label = pyqtgraph.QtGui.QLabel(win)

qi.load('image.png')
label.setPixmap(pyqtgraph.QtGui.QPixmap.fromImage(qi))

win.show()


if __name__ == '__main__':
    import sys
    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        pyqtgraph.QtGui.QApplication.instance().exec_()

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