如何从python opencv中的数组读取原始png? [英] How to read raw png from an array in python opencv?

问题描述

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是因为它们有效，但是可以使用其他格式.

I'm streaming a png image from my iPhone to my MacBook over tcp. The MacBook code is from http://docs.python.org/library/socketserver.html#requesthandler-objects. How can the image be converted for use with OpenCV? A png was selected because they are efficient, but other formats could be used.

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:

I wrote a test program that reads the rawImage from a file, but not sure how to convert it:

# 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)

推荐答案

我知道了:

# 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) 

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