Python gen_nn_ops._max_pool_grad方法代碼示例

# 需要導入模塊: from tensorflow.python.ops import gen_nn_ops [as 別名]
# 或者: from tensorflow.python.ops.gen_nn_ops import _max_pool_grad [as 別名]
def _MaxPoolGrad(self, orig_input, orig_output, grad, window_rows,
                   window_cols, row_stride, col_stride, padding):
    """Max Pooling Gradient.

    Args:
      orig_input: A float Tensor. The original input tensor.
      orig_output: A float Tensor. The original output tensor.
      grad: A float Tensor.
        The 4D (batch x rows x cols x depth) output backprop.
      window_rows: integer. Kernel size along rows dimension.
      window_cols: integer. Kernel size along cols dimension.
      row_stride: integer. Stride along rows dimension
      col_stride: integer. Stride along cols dimension
      padding: PoolingOpDef.Padding.  Padding type.

    Returns:
      A Tensor.
    """
    return gen_nn_ops._max_pool_grad(
        orig_input, orig_output, grad,
        [1, window_rows, window_cols, 1], [1, row_stride, col_stride, 1],
        padding) 

# 需要導入模塊: from tensorflow.python.ops import gen_nn_ops [as 別名]
# 或者: from tensorflow.python.ops.gen_nn_ops import _max_pool_grad [as 別名]
def _MaxPoolGradGrad(op, grad):
    gradient = gen_nn_ops._max_pool_grad(op.inputs[0], op.outputs[0],
            grad, op.get_attr("ksize"), op.get_attr("strides"),
            padding=op.get_attr("padding"), data_format=op.get_attr("data_format"))
    gradgrad1 = array_ops.zeros(shape = array_ops.shape(op.inputs[1]), dtype=gradient.dtype)
    gradgrad2 = array_ops.zeros(shape = array_ops.shape(op.inputs[2]), dtype=gradient.dtype)
    return (gradient, gradgrad1, gradgrad2) 

# 需要導入模塊: from tensorflow.python.ops import gen_nn_ops [as 別名]
# 或者: from tensorflow.python.ops.gen_nn_ops import _max_pool_grad [as 別名]
def _MaxPoolGrad(op, grad):
  return gen_nn_ops._max_pool_grad(op.inputs[0],
                                   op.outputs[0],
                                   grad,
                                   op.get_attr("ksize"),
                                   op.get_attr("strides"),
                                   padding=op.get_attr("padding"),
                                   data_format=op.get_attr("data_format")) 

# 需要導入模塊: from tensorflow.python.ops import gen_nn_ops [as 別名]
# 或者: from tensorflow.python.ops.gen_nn_ops import _max_pool_grad [as 別名]
def _MaxPoolGradGradGrad(op, grad):
  return (array_ops.zeros(
      shape=array_ops.shape(op.inputs[0]),
      dtype=op.inputs[0].dtype), array_ops.zeros(
          shape=array_ops.shape(op.inputs[1]), dtype=op.inputs[1].dtype),
          gen_nn_ops._max_pool_grad(
              op.inputs[0],
              op.inputs[1],
              grad,
              op.get_attr("ksize"),
              op.get_attr("strides"),
              padding=op.get_attr("padding"),
              data_format=op.get_attr("data_format"))) 

# 需要導入模塊: from tensorflow.python.ops import gen_nn_ops [as 別名]
# 或者: from tensorflow.python.ops.gen_nn_ops import _max_pool_grad [as 別名]
def _CompareMaxPoolingBk(self, input_shape, output_shape, ksize, strides,
                           padding):
    for dtype in np.float32, np.float16:
      # Generate numbers in a narrow range, so that there are many duplicates
      # in the input.
      tensor_input = np.random.random_integers(0, 3, input_shape).astype(dtype)
      tensor_output = np.random.rand(*output_shape).astype(dtype)
      with self.test_session(use_gpu=True):
        t = tf.constant(tensor_input, shape=input_shape)
        _, argmax_op = tf.nn.max_pool_with_argmax(t, ksize, strides, padding)
        argmax = argmax_op.eval()
        grad_in = tf.constant(tensor_output, shape=output_shape)
        out_op = gen_nn_ops._max_pool_grad_with_argmax(t, grad_in, argmax,
                                                       ksize, strides, padding)
        gpu_val = out_op.eval()
        self.assertShapeEqual(gpu_val, out_op)
      with self.test_session(use_gpu=False):
        t = tf.constant(tensor_input, shape=input_shape)
        out_op = tf.nn.max_pool(t, ksize, strides, padding)
        orig_out = out_op.eval()
        grad_in = tf.constant(tensor_output, shape=output_shape)
        out_op = gen_nn_ops._max_pool_grad(t, orig_out, grad_in, ksize, strides,
                                           padding)
        cpu_val = out_op.eval()
        self.assertShapeEqual(cpu_val, out_op)
      if dtype == np.float16:
        # The CPU version accumulates its gradient on fp16, so it's less
        # accurate than the GPU version that does the accumulation on fp32
        self.assertAllClose(cpu_val, gpu_val, rtol=0.01, atol=0.01)
      else:
        self.assertAllClose(cpu_val, gpu_val) 

# 需要導入模塊: from tensorflow.python.ops import gen_nn_ops [as 別名]
# 或者: from tensorflow.python.ops.gen_nn_ops import _max_pool_grad [as 別名]
def testDirectNotUseOverlapping(self):
    for num_batches in [1, 3]:
      for row_window_size in [2, 5]:
        for col_window_size in [2, 4]:
          num_rows = row_window_size * 5
          num_cols = col_window_size * 7
          for num_channels in [1, 2]:
            input_shape = (num_batches, num_rows, num_cols, num_channels)
            with self.test_session() as _:
              input_tensor = tf.constant(self._GenerateUniqueRandomInputTensor(
                  input_shape))
              window_size = [1, row_window_size, col_window_size, 1]
              stride_size = [1, row_window_size, col_window_size, 1]
              padding = "VALID"
              output_tensor = tf.nn.max_pool(input_tensor, window_size,
                                             stride_size, padding)
              output_data = output_tensor.eval()
              output_backprop = self._PRNG.randint(100, size=output_data.shape)
              input_backprop_tensor = gen_nn_ops._max_pool_grad(input_tensor,
                                                                output_tensor,
                                                                output_backprop,
                                                                window_size,
                                                                stride_size,
                                                                padding)
              input_backprop = input_backprop_tensor.eval()
              row_seq = list(range(0, num_rows + 1, row_window_size))
              col_seq = list(range(0, num_cols + 1, col_window_size))
              fmp_input_backprop_tensor = gen_nn_ops._fractional_max_pool_grad(
                  input_tensor,
                  output_tensor,
                  output_backprop,
                  row_seq,
                  col_seq,
                  overlapping=False)
              fmp_input_backprop = fmp_input_backprop_tensor.eval()
              self.assertShapeEqual(input_backprop, fmp_input_backprop_tensor)
              self.assertAllClose(input_backprop, fmp_input_backprop) 

# 需要導入模塊: from tensorflow.python.ops import gen_nn_ops [as 別名]
# 或者: from tensorflow.python.ops.gen_nn_ops import _max_pool_grad [as 別名]
def testDirectUseOverlapping(self):
    for num_batches in [1, 3]:
      for row_window_size in [2, 5]:
        for col_window_size in [2, 4]:
          num_rows = (row_window_size - 1) * 5 + 1
          num_cols = (col_window_size - 1) * 7 + 1
          for num_channels in [1, 2]:
            input_shape = (num_batches, num_rows, num_cols, num_channels)
            with self.test_session() as _:
              input_tensor = tf.constant(self._GenerateUniqueRandomInputTensor(
                  input_shape))
              window_size = [1, row_window_size, col_window_size, 1]
              stride_size = [1, row_window_size - 1, col_window_size - 1, 1]
              padding = "VALID"
              output_tensor = tf.nn.max_pool(input_tensor, window_size,
                                             stride_size, padding)
              output_data = output_tensor.eval()
              output_backprop = self._PRNG.randint(100, size=output_data.shape)
              input_backprop_tensor = gen_nn_ops._max_pool_grad(input_tensor,
                                                                output_tensor,
                                                                output_backprop,
                                                                window_size,
                                                                stride_size,
                                                                padding)
              input_backprop = input_backprop_tensor.eval()
              row_seq = list(range(0, num_rows, row_window_size - 1))
              col_seq = list(range(0, num_cols, col_window_size - 1))
              row_seq[-1] += 1
              col_seq[-1] += 1
              fmp_input_backprop_tensor = gen_nn_ops._fractional_max_pool_grad(
                  input_tensor,
                  output_tensor,
                  output_backprop,
                  row_seq,
                  col_seq,
                  overlapping=True)
              fmp_input_backprop = fmp_input_backprop_tensor.eval()
              self.assertShapeEqual(input_backprop, fmp_input_backprop_tensor)
              self.assertAllClose(input_backprop, fmp_input_backprop) 

# 需要導入模塊: from tensorflow.python.ops import gen_nn_ops [as 別名]
# 或者: from tensorflow.python.ops.gen_nn_ops import _max_pool_grad [as 別名]
def MaxPoolGrad_FwGrad(op,
                       dx,
                       dy,
                       dz,
                       ksize=[1, 2, 2, 1],
                       strides=[1, 2, 2, 1],
                       data_format="NHWC",
                       padding="SAME",
                       _op_table=None,
                       _grad_table=None):
  """Forward gradient operator for the backward gradient of max pooling.

  Args:
    op: MaxPoolGrad operator.
    dx: Forward gradient to the input of MaxPool.
    dy: Forward gradient to the output of MaxPool.
    dz: Forward gradient to the backward gradient of the output of MaxPool.
  """
  if dz is None:
    return None
  return gen_nn_ops._max_pool_grad(
      op.inputs[0],
      op.inputs[1],
      dz,
      ksize,
      strides,
      padding,
      data_format=data_format)