X-Git-Url: https://gerrit.akraino.org/r/gitweb?a=blobdiff_plain;f=example-apps%2FPDD%2Fpcb-defect-detection%2Flibs%2Fnetworks%2Fslim_nets%2Falexnet.py;fp=example-apps%2FPDD%2Fpcb-defect-detection%2Flibs%2Fnetworks%2Fslim_nets%2Falexnet.py;h=4e7e563cd127f1f5d0274d636993c8812d01d57e;hb=a785567fb9acfc68536767d20f60ba917ae85aa1;hp=0000000000000000000000000000000000000000;hpb=94a133e696b9b2a7f73544462c2714986fa7ab4a;p=ealt-edge.git diff --git a/example-apps/PDD/pcb-defect-detection/libs/networks/slim_nets/alexnet.py b/example-apps/PDD/pcb-defect-detection/libs/networks/slim_nets/alexnet.py new file mode 100755 index 0000000..4e7e563 --- /dev/null +++ b/example-apps/PDD/pcb-defect-detection/libs/networks/slim_nets/alexnet.py @@ -0,0 +1,125 @@ +# Copyright 2016 The TensorFlow Authors. All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# ============================================================================== +"""Contains a model definition for AlexNet. + +This work was first described in: + ImageNet Classification with Deep Convolutional Neural Networks + Alex Krizhevsky, Ilya Sutskever and Geoffrey E. Hinton + +and later refined in: + One weird trick for parallelizing convolutional neural networks + Alex Krizhevsky, 2014 + +Here we provide the implementation proposed in "One weird trick" and not +"ImageNet Classification", as per the paper, the LRN layers have been removed. + +Usage: + with slim.arg_scope(alexnet.alexnet_v2_arg_scope()): + outputs, end_points = alexnet.alexnet_v2(inputs) + +@@alexnet_v2 +""" + +from __future__ import absolute_import +from __future__ import division +from __future__ import print_function + +import tensorflow as tf + +slim = tf.contrib.slim +trunc_normal = lambda stddev: tf.truncated_normal_initializer(0.0, stddev) + + +def alexnet_v2_arg_scope(weight_decay=0.0005): + with slim.arg_scope([slim.conv2d, slim.fully_connected], + activation_fn=tf.nn.relu, + biases_initializer=tf.constant_initializer(0.1), + weights_regularizer=slim.l2_regularizer(weight_decay)): + with slim.arg_scope([slim.conv2d], padding='SAME'): + with slim.arg_scope([slim.max_pool2d], padding='VALID') as arg_sc: + return arg_sc + + +def alexnet_v2(inputs, + num_classes=1000, + is_training=True, + dropout_keep_prob=0.5, + spatial_squeeze=True, + scope='alexnet_v2'): + """AlexNet version 2. + + Described in: http://arxiv.org/pdf/1404.5997v2.pdf + Parameters from: + github.com/akrizhevsky/cuda-convnet2/blob/master/layers/ + layers-imagenet-1gpu.cfg + + Note: All the fully_connected layers have been transformed to conv2d layers. + To use in classification mode, resize input to 224x224. To use in fully + convolutional mode, set spatial_squeeze to false. + The LRN layers have been removed and change the initializers from + random_normal_initializer to xavier_initializer. + + Args: + inputs: a tensor of size [batch_size, height, width, channels]. + num_classes: number of predicted classes. + is_training: whether or not the model is being trained. + dropout_keep_prob: the probability that activations are kept in the dropout + layers during training. + spatial_squeeze: whether or not should squeeze the spatial dimensions of the + outputs. Useful to remove unnecessary dimensions for classification. + scope: Optional scope for the variables. + + Returns: + the last op containing the log predictions and end_points dict. + """ + with tf.variable_scope(scope, 'alexnet_v2', [inputs]) as sc: + end_points_collection = sc.name + '_end_points' + # Collect outputs for conv2d, fully_connected and max_pool2d. + with slim.arg_scope([slim.conv2d, slim.fully_connected, slim.max_pool2d], + outputs_collections=[end_points_collection]): + net = slim.conv2d(inputs, 64, [11, 11], 4, padding='VALID', + scope='conv1') + net = slim.max_pool2d(net, [3, 3], 2, scope='pool1') + net = slim.conv2d(net, 192, [5, 5], scope='conv2') + net = slim.max_pool2d(net, [3, 3], 2, scope='pool2') + net = slim.conv2d(net, 384, [3, 3], scope='conv3') + net = slim.conv2d(net, 384, [3, 3], scope='conv4') + net = slim.conv2d(net, 256, [3, 3], scope='conv5') + net = slim.max_pool2d(net, [3, 3], 2, scope='pool5') + + # Use conv2d instead of fully_connected layers. + with slim.arg_scope([slim.conv2d], + weights_initializer=trunc_normal(0.005), + biases_initializer=tf.constant_initializer(0.1)): + net = slim.conv2d(net, 4096, [5, 5], padding='VALID', + scope='fc6') + net = slim.dropout(net, dropout_keep_prob, is_training=is_training, + scope='dropout6') + net = slim.conv2d(net, 4096, [1, 1], scope='fc7') + net = slim.dropout(net, dropout_keep_prob, is_training=is_training, + scope='dropout7') + net = slim.conv2d(net, num_classes, [1, 1], + activation_fn=None, + normalizer_fn=None, + biases_initializer=tf.zeros_initializer(), + scope='fc8') + + # Convert end_points_collection into a end_point dict. + end_points = slim.utils.convert_collection_to_dict(end_points_collection) + if spatial_squeeze: + net = tf.squeeze(net, [1, 2], name='fc8/squeezed') + end_points[sc.name + '/fc8'] = net + return net, end_points +alexnet_v2.default_image_size = 224