Python* API Reference for Intel® Data Analytics Acceleration Library 2020 Update 1

max_pool2d_layer_dense_batch.py

1 # file: max_pool2d_layer_dense_batch.py
2 #===============================================================================
3 # Copyright 2014-2020 Intel Corporation
4 #
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
8 #
9 # http://www.apache.org/licenses/LICENSE-2.0
10 #
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
16 #===============================================================================
17 
18 #
19 # ! Content:
20 # ! Python example of neural network forward and backward two-dimensional maximum pooling layers usage
21 # !
22 # !*****************************************************************************
23 
24 #
25 
26 
27 #
28 
29 import os
30 import sys
31 
32 from daal.algorithms.neural_networks import layers
33 from daal.algorithms.neural_networks.layers import maximum_pooling2d
34 
35 utils_folder = os.path.realpath(os.path.abspath(os.path.dirname(os.path.dirname(__file__))))
36 if utils_folder not in sys.path:
37  sys.path.insert(0, utils_folder)
38 from utils import printTensor, readTensorFromCSV
39 
40 # Input data set name
41 datasetFileName = os.path.join("..", "data", "batch", "layer.csv")
42 
43 if __name__ == "__main__":
44 
45  # Read datasetFileName from a file and create a tensor to store input data
46  data = readTensorFromCSV(datasetFileName)
47  nDim = data.getNumberOfDimensions()
48 
49  printTensor(data, "Forward two-dimensional maximum pooling layer input (first 10 rows):", 10)
50 
51  # Create an algorithm to compute forward two-dimensional maximum pooling layer results using default method
52  forwardLayer = maximum_pooling2d.forward.Batch(nDim)
53  forwardLayer.input.setInput(layers.forward.data, data)
54 
55  # Compute forward two-dimensional maximum pooling layer results
56  forwardLayer.compute()
57 
58  # Get the computed forward two-dimensional maximum pooling layer results
59  forwardResult = forwardLayer.getResult()
60 
61  printTensor(forwardResult.getResult(layers.forward.value), "Forward two-dimensional maximum pooling layer result (first 5 rows):", 5)
62  printTensor(forwardResult.getLayerData(layers.maximum_pooling2d.auxSelectedIndices),
63  "Forward two-dimensional maximum pooling layer selected indices (first 10 rows):", 10)
64 
65  # Create an algorithm to compute backward two-dimensional maximum pooling layer results using default method
66  backwardLayer = layers.maximum_pooling2d.backward.Batch(nDim)
67  backwardLayer.input.setInput(layers.backward.inputGradient, forwardResult.getResult(layers.forward.value))
68  backwardLayer.input.setInputLayerData(layers.backward.inputFromForward, forwardResult.getResultLayerData(layers.forward.resultForBackward))
69 
70  # Compute backward two-dimensional maximum pooling layer results
71  backwardLayer.compute()
72 
73  # Get the computed backward two-dimensional maximum pooling layer results
74  backwardResult = backwardLayer.getResult()
75 
76  printTensor(backwardResult.getResult(layers.backward.gradient),
77  "Backward two-dimensional maximum pooling layer result (first 10 rows):", 10)

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