2 Copyright (c) 2017-2019 Intel Corporation
4 Licensed under the Apache License, Version 2.0 (the "License");
5 you may not use this file except in compliance with the License.
6 You may obtain a copy of the License at
8 http://www.apache.org/licenses/LICENSE-2.0
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
20 from mo.front.common.replacement import FrontReplacementOp
21 from mo.graph.graph import Graph
22 from mo.ops.lin_op import Mul
23 from mo.ops.const import Const
26 class LRNReplacer(FrontReplacementOp):
30 def replace_sub_graph(self, graph: Graph, match: dict):
33 if not node.has_valid('bias') or (node.has_valid('bias') and node.bias == 1):
36 # Calculate scale value & create Const op
37 scale_value = np.array(1. / (pow(node.bias, node.beta)))
38 node.alpha /= node.bias
39 const_node = Const(graph, dict(value=scale_value, shape=scale_value.shape))
41 # Get all outputs for LRN layer
42 out_nodes = [node for node in node.out_nodes().values()]
44 # Create Mul node with inputs
45 mul_node = Mul(graph, dict(name=node.id + "/Mul_"))
46 mnode = mul_node.create_node(inputs=[node, const_node.create_node()])
48 # Move edges from LRN to Mul node
49 for out_node in out_nodes:
50 edge_attrs = graph.get_edge_data(node.id, out_node.id)[0]
51 graph.remove_edge(node.id, out_node.id)
52 graph.add_edges_from([(mnode.id, out_node.id, edge_attrs)])