I want to know whether opencv3 and python3 have GPU mode?

asked 2018-01-12 07:26:38 -0600

MadFrog
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I want to know whether opencv3 and python3 have GPU mode,I looked at this link and knew that there was no GPU mode when opencv2, but does opencv3 have GPU mode now?

Not deep learning, just the methods commonly used by opencv, is there a GPU mode?

answered 2018-01-12 07:56:07 -0600

berak
32993 ●7 ●81 ●312

updated 2018-01-12 07:56:52 -0600

you can use opencl (cv2.UMat), but there is no cuda support at all for python.

(if you need that, you have to use c++)

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@break How do I start OpenCL when I speed up? I have installed CUDA.

MadFrog ( 2018-01-12 08:11:44 -0600 )edit

@break

print(cv2.ocl.haveOpenCL())
cv2.ocl.setUseOpenCL(True)

So it starts? So it's speeding up?

MadFrog ( 2018-01-12 08:14:36 -0600 )edit

@MadFrog, againg installing CUDA is useless, if you want to use opencv & python. (though there are 3rdparty libs like pycuda)

berak ( 2018-01-12 08:32:46 -0600 )edit

and you have to put your numpy arrays into cv2.UMat, to use opencl

berak ( 2018-01-12 09:33:52 -0600 )edit

@break I have already installed CUDA.And "print(cv2.ocl.haveOpenCL())" is "True".Then how to put numpy arrays into cv2.UMat?Can you give me a example?

MadFrog ( 2018-01-12 22:39:22 -0600 )edit

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