The `fromData()` function in PyQt5.QtGui.QImage class is used to create a QImage object from the binary image data. It takes a byte array that represents the image data and returns a QImage object that can be further manipulated or displayed on a PyQt5 application's user interface. This function is useful when dealing with image data that is received or retrieved in binary format, allowing easy conversion into a QImage object for further processing.
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