ExtractImagePatches with dynamic batch size

[frederik-uni]

is it possible to get this working with a dynamic batch size
bg shape = (None, const, const, const)

 patch1 = tf.image.extract_patches(bg,
                                          sizes=[1, self.k_size, self.k_size, 1],
                                          strides=[1, self.stride, self.stride, 1],
                                          rates=[1, 1, 1, 1],
                                          padding='VALID')