距离

1. 欧氏距离和余弦相似度

def euclidean_distance(face_encodings, face_to_compare):
    return np.linalg.norm(face_encodings - face_to_compare, axis=1)
def cosin_metric(x1, x2):
    # single feature vs. single feature
    return np.dot(x1, x2) / (np.linalg.norm(x1) * np.linalg.norm(x2))
def cosin_metric(features, x):
    # all features vs. single feature
    return np.dot(features, x)/(np.linalg.norm(features, axis=1)*np.linalg.norm(x))

2. xxxx

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References

链接 链接