OpenCV - 读取 16 位灰度图像

Question

I'm trying to read a 16 bit grayscale image using OpenCV 2.4 in Python, but it seems to be loading it as 8 bit.

I'm doing:

im = cv2.imread(path,0)
print im

[[25 25 28 ...,  0  0  0]
[ 0  0  0 ...,  0  0  0]
[ 0  0  0 ...,  0  0  0]
..., 

How do I get it as 16 bit?

Answer 1

Figured it out. In case anyone else runs into this problem:

im = cv2.imread(path,-1)

Setting the flag to 0, to load as grayscale seems to default to 8 bit. Setting to -1 loads the image as is.

Answer 2

为了提高可读性，使用标志cv2.IMREAD_ANYDEPTH

image = cv2.imread( path, cv2.IMREAD_ANYDEPTH )

Answer 3

I had the same issue (16-bit .tif loading as 8-bit using cv2.imread). However, using the -1 flag didn't help. Instead, I was able to load 16-bit images using the tifffile package.

Answer 4

This question suggests that image = cv2.imread('16bit.png', cv2.IMREAD_UNCHANGED) will also solve your problem.