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#!/usr/bin/env python | ||
# -*- coding: UTF-8 -*- | ||
# File: inception-bn.py | ||
# Author: Yuxin Wu <ppwwyyxx@gmail.com> | ||
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import cv2 | ||
import argparse | ||
import numpy as np | ||
import os | ||
import tensorflow as tf | ||
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from tensorpack import * | ||
from tensorpack.tfutils.symbolic_functions import * | ||
from tensorpack.tfutils.summary import * | ||
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BATCH_SIZE = 64 | ||
INPUT_SHAPE = 224 | ||
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""" | ||
Inception-BN model on ILSVRC12. | ||
See "Batch Normalization: Accelerating Deep Network Training by Reducing Internal Covariate Shift", arxiv:1502.03167 | ||
This config reaches 71% single-crop validation error after 300k steps with 6 TitanX. | ||
Learning rate may need a different schedule for different number of GPUs (because batch size will be different). | ||
""" | ||
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class Model(ModelDesc): | ||
def __init__(self): | ||
super(Model, self).__init__() | ||
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def _get_input_vars(self): | ||
return [InputVar(tf.float32, [None, INPUT_SHAPE, INPUT_SHAPE, 3], 'input'), | ||
InputVar(tf.int32, [None], 'label') ] | ||
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def _get_cost(self, input_vars, is_training): | ||
image, label = input_vars | ||
image = image / 128.0 - 1 | ||
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def inception(name, x, nr1x1, nr3x3r, nr3x3, nr233r, nr233, nrpool, pooltype): | ||
stride = 2 if nr1x1 == 0 else 1 | ||
with tf.variable_scope(name) as scope: | ||
outs = [] | ||
if nr1x1 != 0: | ||
outs.append(Conv2D('conv1x1', x, nr1x1, 1)) | ||
x2 = Conv2D('conv3x3r', x, nr3x3r, 1) | ||
outs.append(Conv2D('conv3x3', x2, nr3x3, 3, stride=stride)) | ||
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x3 = Conv2D('conv233r', x, nr233r, 1) | ||
x3 = Conv2D('conv233a', x3, nr233, 3) | ||
outs.append(Conv2D('conv233b', x3, nr233, 3, stride=stride)) | ||
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if pooltype == 'max': | ||
x4 = MaxPooling('mpool', x, 3, stride, padding='SAME') | ||
else: | ||
assert pooltype == 'avg' | ||
x4 = AvgPooling('apool', x, 3, stride, padding='SAME') | ||
if nrpool != 0: # pool + passthrough if nrpool == 0 | ||
x4 = Conv2D('poolproj', x4, nrpool, 1) | ||
outs.append(x4) | ||
return tf.concat(3, outs, name='concat') | ||
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with argscope(Conv2D, nl=BNReLU(is_training), use_bias=False): | ||
l = Conv2D('conv0', image, 64, 7, stride=2) | ||
l = MaxPooling('pool0', l, 3, 2, padding='SAME') | ||
l = Conv2D('conv1', l, 64, 1) | ||
l = Conv2D('conv2', l, 192, 3) | ||
l = MaxPooling('pool2', l, 3, 2, padding='SAME') | ||
# 28 | ||
l = inception('incep3a', l, 64, 64, 64, 64, 96, 32, 'avg') | ||
l = inception('incep3b', l, 64, 64, 96, 64, 96, 64, 'avg') | ||
l = inception('incep3c', l, 0, 128, 160, 64, 96, 0, 'max') | ||
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br1 = Conv2D('loss1conv', l, 128, 1) | ||
br1 = FullyConnected('loss1fc', br1, 1024) | ||
br1 = FullyConnected('loss1logit', br1, 1000, nl=tf.identity) | ||
loss1 = tf.nn.sparse_softmax_cross_entropy_with_logits(br1, label) | ||
loss1 = tf.reduce_mean(loss1, name='loss1') | ||
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# 14 | ||
l = inception('incep4a', l, 224, 64, 96, 96, 128, 128, 'avg') | ||
l = inception('incep4b', l, 192, 96, 128, 96, 128, 128, 'avg') | ||
l = inception('incep4c', l, 160, 128, 160, 128, 160, 128, 'avg') | ||
l = inception('incep4d', l, 96, 128, 192, 160, 192, 128, 'avg') | ||
l = inception('incep4e', l, 0, 128, 192, 192, 256, 0, 'max') | ||
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br2 = Conv2D('loss2conv', l, 128, 1) | ||
br2 = FullyConnected('loss2fc', br2, 1024) | ||
br2 = FullyConnected('loss2logit', br2, 1000, nl=tf.identity) | ||
loss2 = tf.nn.sparse_softmax_cross_entropy_with_logits(br2, label) | ||
loss2 = tf.reduce_mean(loss2, name='loss2') | ||
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# 7 | ||
l = inception('incep5a', l, 352, 192, 320, 160, 224, 128, 'avg') | ||
l = inception('incep5b', l, 352, 192, 320, 192, 224, 128, 'max') | ||
l = GlobalAvgPooling('gap', l) | ||
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logits = FullyConnected('linear', l, out_dim=1000, nl=tf.identity) | ||
prob = tf.nn.softmax(logits, name='output') | ||
loss3 = tf.nn.sparse_softmax_cross_entropy_with_logits(logits, label) | ||
loss3 = tf.reduce_mean(loss3, name='loss3') | ||
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cost = tf.add_n([loss3, 0.3 * loss2, 0.3 * loss1], name='weighted_cost') | ||
for k in [cost, loss1, loss2, loss3]: | ||
tf.add_to_collection(MOVING_SUMMARY_VARS_KEY, k) | ||
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wrong = prediction_incorrect(logits, label) | ||
nr_wrong = tf.reduce_sum(wrong, name='wrong') | ||
# monitor training error | ||
tf.add_to_collection( | ||
MOVING_SUMMARY_VARS_KEY, tf.reduce_mean(wrong, name='train_error')) | ||
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# weight decay on all W of fc layers | ||
wd_w = tf.train.exponential_decay(0.0002, get_global_step_var(), | ||
80000, 0.7, True) | ||
wd_cost = tf.mul(wd_w, regularize_cost('.*/W', tf.nn.l2_loss), name='l2_regularize_loss') | ||
tf.add_to_collection(MOVING_SUMMARY_VARS_KEY, wd_cost) | ||
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add_param_summary([('.*/W', ['histogram'])]) # monitor W | ||
return tf.add_n([cost, wd_cost], name='cost') | ||
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def get_data(train_or_test): | ||
isTrain = train_or_test == 'train' | ||
ds = dataset.ILSVRC12(args.data, train_or_test, shuffle=True if isTrain else False) | ||
meta = dataset.ILSVRCMeta() | ||
pp_mean = meta.get_per_pixel_mean() | ||
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if isTrain: | ||
augmentors = [ | ||
imgaug.Resize((256, 256)), | ||
imgaug.MapImage(lambda x: x - pp_mean), | ||
imgaug.RandomCrop((224, 224)), | ||
imgaug.Flip(horiz=True), | ||
] | ||
else: | ||
augmentors = [ | ||
imgaug.Resize((256, 256)), | ||
imgaug.MapImage(lambda x: x - pp_mean), | ||
imgaug.CenterCrop((224, 224)), | ||
] | ||
ds = AugmentImageComponent(ds, augmentors) | ||
ds = BatchData(ds, BATCH_SIZE, remainder=not isTrain) | ||
if isTrain: | ||
ds = PrefetchData(ds, 20, 5) | ||
return ds | ||
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def get_config(): | ||
# prepare dataset | ||
dataset_train = get_data('train') | ||
step_per_epoch = 5000 | ||
dataset_val = get_data('val') | ||
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sess_config = get_default_sess_config(0.99) | ||
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lr = tf.Variable(0.045, trainable=False, name='learning_rate') | ||
tf.scalar_summary('learning_rate', lr) | ||
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return TrainConfig( | ||
dataset=dataset_train, | ||
optimizer=tf.train.MomentumOptimizer(lr, 0.9), | ||
callbacks=Callbacks([ | ||
StatPrinter(), | ||
ModelSaver(), | ||
InferenceRunner(dataset_val, ClassificationError()), | ||
#HumanHyperParamSetter('learning_rate', 'hyper-googlenet.txt') | ||
ScheduledHyperParamSetter('learning_rate', | ||
[(8, 0.03), (13, 0.02), (21, 5e-3), | ||
(28, 3e-3), (33, 1e-3), (44, 5e-4), | ||
(49, 1e-4), (59, 2e-5)]) | ||
]), | ||
session_config=sess_config, | ||
model=Model(), | ||
step_per_epoch=step_per_epoch, | ||
max_epoch=80, | ||
) | ||
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if __name__ == '__main__': | ||
parser = argparse.ArgumentParser() | ||
parser.add_argument('--gpu', help='comma separated list of GPU(s) to use.') # nargs='*' in multi mode | ||
parser.add_argument('--load', help='load model') | ||
parser.add_argument('--data', help='ImageNet data root directory', | ||
required=True) | ||
global args | ||
args = parser.parse_args() | ||
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basename = os.path.basename(__file__) | ||
logger.set_logger_dir( | ||
os.path.join('train_log', basename[:basename.rfind('.')])) | ||
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if args.gpu: | ||
os.environ['CUDA_VISIBLE_DEVICES'] = args.gpu | ||
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with tf.Graph().as_default(): | ||
config = get_config() | ||
if args.load: | ||
config.session_init = SaverRestore(args.load) | ||
if args.gpu: | ||
config.nr_tower = len(args.gpu.split(',')) | ||
QueueInputTrainer(config).train() |
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