Reading .exr files in OpenCV

python image opencv zbuffer openexr
gaya picture gaya · Jun 19, 2017 · Viewed 9.1k times · Source

I have generated some depth maps using blender and have saved z-buffer values(32 bits) in OpenEXR format. Is there any way to access values from a .exr file (pixel by pixel depth info) using OpenCV 2.4.13 and python 2.7? There is no example anywhere to be found. All I can see in documentation that this file format is supported. But trying to read such a file results in error.

new=cv2.imread("D:\\Test1\\0001.exr")
cv2.imshow('exr',new)
print new[0,0]

Error:

print new[0,0]
TypeError: 'NoneType' object has no attribute '__getitem__'

and

cv2.imshow('exr',new)
cv2.error: ..\..\..\..\opencv\modules\highgui\src\window.cpp:261: error: (-215) size.width>0 && size.height>0 in function cv::imshow

Closest I found is this link and this link.

Answer

lwohlhart picture lwohlhart · Jul 26, 2019

I might be a little late to the party but; Yes you can definitely use OpenCV for that.

cv2.imread(PATH_TO_EXR_FILE,  cv2.IMREAD_ANYCOLOR | cv2.IMREAD_ANYDEPTH)

should get you what you need

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