如何从python opencv中的数组读取原始png？

Question

我正在通过TCP将iPhone中的png图像流式传输到MacBook。MacBook代码来自http://docs.python.org/library/socketserver.html#requesthandler-
objects
。如何转换图像以用于OpenCV？选择png是因为它们高效，但是可以使用其他格式。

我编写了一个测试程序，该程序从文件中读取rawImage，但不确定如何将其转换：

# Read rawImage from a file, but in reality will have it from TCPServer
f = open('frame.png', "rb")
rawImage = f.read()
f.close()

# Not sure how to convert rawImage
npImage = np.array(rawImage)
matImage = cv2.imdecode(rawImage, 1)

#show it
cv.NamedWindow('display')
cv.MoveWindow('display', 10, 10)
cv.ShowImage('display', matImage)
cv. WaitKey(0)

Answer 1

我想到了：

# Read rawImage from a file, but in reality will have it from TCPServer
f = open('frame.png', "rb")
rawImage = f.read()
f.close()

# Convert rawImage to Mat
pilImage = Image.open(StringIO(rawImage));
npImage = np.array(pilImage)
matImage = cv.fromarray(npImage)

#show it
cv.NamedWindow('display')
cv.MoveWindow('display', 10, 10)
cv.ShowImage('display', matImage)
cv. WaitKey(0)