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export_pb.py
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export_pb.py
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"""
@Time : 2019/3/19
@Author : Li YongHong
@Email : lyh_robert@163.com
@File : export_pb.py
"""
import torch
import tensorflow as tf
from model.mgn import Model
import numpy as np
import os
from config import config as CFG
from tensorflow.python.framework import graph_util
slim = tf.contrib.slim
flags = tf.flags
flags.DEFINE_string("dataset", default="/data/dataset/reid/Market-1501-v15.09.15", help="image data path")
flags.DEFINE_string("train_dir", default="./mgn_reid/exp/train/ckpt", help="ckpt path")
flags.DEFINE_string("summary_path", default="./mgn_reid/exp/train/summary", help="summary path")
flags.DEFINE_string("tf_name_path", default="./tensor_name/fianl_tf_name_v2.txt", help="File that holds the tensorflow tensor name")
flags.DEFINE_string("pt_name_path", default="./tensor_name/final_pt_name.txt", help="File that holds the pytorch tensor name")
flags.DEFINE_string("pt_model_path", default="./pretrain_model/MGN_12_27_M.pt", help="pytorch model path")
flags.DEFINE_string("pb_save_path", default="./mgn_reid/exp/train/save_pb", help="pb file path")
FLAGS = flags.FLAGS
root = FLAGS.dataset
train_dir = FLAGS.train_dir
tf_name_path = FLAGS.tf_name_path
pt_name_path = FLAGS.pt_name_path
pt_model_path = FLAGS.pt_model_path
summary_save_path = FLAGS.summary_path
pb_path = FLAGS.pb_save_path
if not os.path.exists(train_dir):
os.makedirs(train_dir)
if not os.path.exists(summary_save_path):
os.makedirs(summary_save_path)
if not os.path.exists(pb_path):
os.makedirs(pb_path)
def combined_static_and_dynamic_shape(tensor):
"""Returns a list containing static and dynamic values for the dimensions.
Returns a list of static and dynamic values for shape dimensions. This is
useful to preserve static shapes when available in reshape operation.
Args:
tensor: A tensor of any type.
Returns:
A list of size tensor.shape.ndims containing integers or a scalar tensor.
"""
static_tensor_shape = tensor.shape.as_list()
dynamic_tensor_shape = tf.shape(tensor)
combined_shape = []
for index, dim in enumerate(static_tensor_shape):
if dim is not None:
combined_shape.append(dim)
else:
combined_shape.append(dynamic_tensor_shape[index])
return combined_shape
def restore_model_v2(sess,
global_variables,
pt_dict,
tf_name_path,
pt_name_path):
tf_names = []
with open(tf_name_path) as f:
for line in f:
tf_names.append(line.strip())
pt_name = []
with open(pt_name_path) as f:
for line in f:
pt_name.append(line.split(" ")[0])
tf2pt = dict(zip(tf_names, pt_name))
for var in global_variables:
if str(var) in tf_names:
value = pt_dict[tf2pt[str(var)]].numpy()
if len(np.array(value.shape)) == 4:
value = np.transpose(value, [2, 3, 1, 0])
elif len(np.array(value.shape)) == 2:
value = np.transpose(value, [1, 0])
print(str(var))
_ops = tf.assign(var, value)
sess.run(_ops)
def train():
batch_image = tf.placeholder(tf.float32, shape=[None, None, None, CFG.channel], name='image_tensor')
batch_label = tf.placeholder(tf.int32, shape=[None, ], name='label_tensor')
reid_model = Model(is_training=False, num_class=751)
outputs = reid_model.predict(batch_image, 'mgn')
triplet_losses = [reid_model.loss(triplet_logits, batch_label, margin=1.2) for triplet_logits in outputs[1]]
softmax_losses = [tf.losses.sparse_softmax_cross_entropy(batch_label, softmax_logits) for softmax_logits in outputs[2]]
triplet_loss = sum(triplet_losses)/len(triplet_losses)
softmax_loss = sum(softmax_losses)/len(softmax_losses)
total_loss = triplet_loss + softmax_loss
epoch_id = tf.Variable(0, name='global_step', trainable=False)
inc_op = tf.assign_add(epoch_id, 1, name='increment_global_step')
lr = tf.train.piecewise_constant(epoch_id, boundaries=CFG.lr_steps,
values=CFG.learning_rate,
name='lr_schedule')
optimizer = tf.train.MomentumOptimizer(lr, momentum=CFG.momentum).minimize(total_loss)
#save summary
triplet_loss_summary = tf.summary.scalar(name="triplet_loss", tensor=triplet_loss)
softmax_loss_summary = tf.summary.scalar(name="softmax_loss", tensor=softmax_loss)
total_loss_summary = tf.summary.scalar(name="total_loss", tensor=total_loss)
learning_rate_summary = tf.summary.scalar(name="learning_rate", tensor=lr)
param_his_summary_list = []
for var in tf.trainable_variables():
if "weights" in var.name or \
"gamma" in var.name or \
"beta" in var.name or \
"moving_mean" in var.name or \
"moving_variance" in var.name:
param_his_summary_list.append(tf.summary.histogram(var.name, var))
param_his_summary_list.extend([triplet_loss_summary,
softmax_loss_summary,
total_loss_summary,
learning_rate_summary])
train_summary = tf.summary.merge(param_his_summary_list)
with tf.Session() as sess:
saver = tf.train.Saver()
if len(os.listdir(train_dir)) > 0:
latest_checkpoint_path = tf.train.latest_checkpoint(train_dir)
saver.restore(sess, latest_checkpoint_path)
print("restore pretrained checkpoint from %s" % (latest_checkpoint_path))
else:
# 从pytorch的预训练模型中加载参数
restore_model_v2(sess,
tf.global_variables(),
torch.load(pt_model_path, map_location='cpu'),
tf_name_path,
pt_name_path)
print('restore from pytorch best pt..........')
constant_graph = graph_util.convert_variables_to_constants(sess, sess.graph_def,
["person_embedding"])
with tf.gfile.FastGFile(os.path.join(pb_path, "model.pb"), mode='wb') as f:
f.write(constant_graph.SerializeToString())
if __name__ == '__main__':
train()