如何从python opencv中的数组读取原始png？

我想到了：

# Read rawImage from a file, but in reality will have it from TCPServerf = open('frame.png', "rb")rawImage = f.read()f.close()# Convert rawImage to MatpilImage = Image.open(StringIO(rawImage));npImage = np.array(pilImage)matImage = cv.fromarray(npImage)#show itcv.NamedWindow('display')cv.MoveWindow('display', 10, 10)cv.ShowImage('display', matImage)cv. WaitKey(0)