将PyQt5 QPixmap转换为numpy ndarray
我有像素图:
pixmap = self._screen.grabWindow(0, self._x, self._y,
self._width, self._height)
我想将其转换为OpenCV格式。我尝试将其转换numpy.ndarray
为此处所述,但出现错误sip.voidptr object has an unknown size
有什么方法可以获取numpy数组(与cv2.VideoCapture
read
方法返回的格式相同)?
回答:
我使用以下代码获取了numpy数组:
channels_count = 4pixmap = self._screen.grabWindow(0, self._x, self._y, self._width, self._height)
image = pixmap.toImage()
s = image.bits().asstring(self._width * self._height * channels_count)
arr = np.fromstring(s, dtype=np.uint8).reshape((self._height, self._width, channels_count))
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