How to check if opencv is using GPU or not?

Question

I need to know if the current opencv installation is using GPU or not. I tried print(cv2.getBuildInformation()) but this is not what I'm looking for. I also tried getCudaEnabledDeviceCount() this doesn't work and throws error too.

Answer 1

If you have installed cuda , there's a built-in function in opencv which you can use now.

import cv2
count = cv2.cuda.getCudaEnabledDeviceCount()
print(count)

count returns the number of installed CUDA-enabled devices.

You can use this function for handling all cases.

def is_cuda_cv(): # 1 == using cuda, 0 = not using cuda
    try:
        count = cv2.cuda.getCudaEnabledDeviceCount()
        if count > 0:
            return 1
        else:
            return 0
    except:
        return 0

Tested with opencv 4.2.0