def METHOD_NAME(image):
    image = np.array(cv2.resize(image, (320,320)),dtype=np.float32)
    R_MEAN = 123.68
    G_MEAN = 116.78
    B_MEAN = 103.94
    mean = np.array([B_MEAN, G_MEAN, R_MEAN], dtype=np.float32)
    std = np.array([1.0, 1.0, 1.0], dtype=np.float32)
    image = (image - mean) / std
    return image