How to parse the depth image using python?

[manphis]

Which python tool should I use to open the depth image .png file? I use cv2 imread() to read the depth file: cv2img = cv2.imread('MDepth-00000031.png', cv2.IMREAD_GRAYSCALE)

But the value of cv2img is around 10 ~ 30, which seems not in millimeters.

How to parse the depth image using python?