Pyqt5 使用QGraphicsView 显示图片

需要使用Pyqt5来显示MRI图片（240*240*155）的三视图，使用三个QGraphicsView 显示， 在实现过程中发现几个问题：

1、先使用Nibabel读入图像数组，拆成三个维度的图像，再使用

depth_image = image[:, :, img_index[2]]
img = depth_image
frame = PyQt5.QtGui.QImage(img, img.shape[0],img.shape[1], img.shape[0],
                                   PyQt5.QtGui.QImage.Format_Indexed8)
pix = QPixmap.fromImage(frame)

转换成QImage再转换成QPixmap，这时候产生错误：

TypeError: arguments did not match any overloaded call:
  QImage(): too many arguments
  QImage(QSize, QImage.Format): argument 1 has unexpected type 'numpy.ndarray'
  QImage(int, int, QImage.Format): argument 1 has unexpected type 'numpy.ndarray'
  QImage(bytes, int, int, QImage.Format): argument 1 has unexpected type 'numpy.ndarray'
  QImage(sip.voidptr, int, int, QImage.Format): argument 1 has unexpected type 'numpy.ndarray'
  QImage(bytes, int, int, int, QImage.Format): argument 1 has unexpected type 'numpy.ndarray'
  QImage(sip.voidptr, int, int, int, QImage.Format): argument 1 has unexpected type 'numpy.ndarray'
  QImage(List[str]): argument 1 has unexpected type 'numpy.ndarray'
  QImage(str, format: str = None): argument 1 has unexpected type 'numpy.ndarray'
  QImage(QImage): argument 1 has unexpected type 'numpy.ndarray'
  QImage(Any): too many arguments

通过创建一个numpy数组的复制解决，原理未知：

depth_image = image[:, :, img_index[2]].copy()

2、在用QGraphicsView 进行显示时，发现图像成条纹状：

 

后来发现是维度有问题，改了一下：

frame = PyQt5.QtGui.QImage(img, img.shape[1],img.shape[0], img.shape[1],PyQt5.QtGui.QImage.Format_Indexed8)

可以正常显示。

TODO：比例还需要改一下，方向好像也有问题，再加鼠标动作捕捉。