How to extract and save as separate files the RGBA and Z channels from an EXR file in Python?
Question:
Tell me, how I can extract individual channels from an exr image? This feature is in Photoshop and After Effects, but I would like to do it with code. I found the required code here (https://gist.github.com/jadarve/de3815874d062f72eaf230a7df41771b), but it does not save the extracted channels into separate image files
Answers:
So, if you have img with shape (height, width, 3) and it is float, and in RGB order, you need:
import cv2
...
... existing code
...
# Change to range 0..65535
img = (img * 65535).astype(np.uint16)
# Change from RGB to BGR ordering
imgBGR = cv2.cvtColor(img, cv2.COLOR_RGB2BGR)
# Save to disk
cv2.imwrite('result.png', imgBGR)
# Now do,likewise for depth data
z = (z * 65535).astype(np.uint16)
cv2.imwrite('z.png', z)
If you have RGBA, use cv2.COLOR_RGBA2BGRA
Tell me, how I can extract individual channels from an exr image? This feature is in Photoshop and After Effects, but I would like to do it with code. I found the required code here (https://gist.github.com/jadarve/de3815874d062f72eaf230a7df41771b), but it does not save the extracted channels into separate image files
So, if you have img with shape (height, width, 3) and it is float, and in RGB order, you need:
import cv2
...
... existing code
...
# Change to range 0..65535
img = (img * 65535).astype(np.uint16)
# Change from RGB to BGR ordering
imgBGR = cv2.cvtColor(img, cv2.COLOR_RGB2BGR)
# Save to disk
cv2.imwrite('result.png', imgBGR)
# Now do,likewise for depth data
z = (z * 65535).astype(np.uint16)
cv2.imwrite('z.png', z)
If you have RGBA, use cv2.COLOR_RGBA2BGRA