How do I use the `em.getCovs()` function in python with opencv3?
def dictionary(descriptors, N):
em = cv2.ml.EM_create()
em.setClustersNumber(N)
em.trainEM(descriptors)
means = em.getMeans()
covs = em.getCovs()
weights = em.getWeights()
return np.float32(means), np.float32(covs), np.float32(weights)
I keep getting a `AttributeError: 'cv2.ml_EM' object has no attribute 'getCovs'`
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