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| # Copyright 2017 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 training plan for the Im2vox model.""" | |
| from __future__ import absolute_import | |
| from __future__ import division | |
| from __future__ import print_function | |
| import os | |
| import numpy as np | |
| import tensorflow as tf | |
| from tensorflow import app | |
| import model_ptn | |
| flags = tf.app.flags | |
| slim = tf.contrib.slim | |
| flags.DEFINE_string('inp_dir', | |
| '', | |
| 'Directory path containing the input data (tfrecords).') | |
| flags.DEFINE_string( | |
| 'dataset_name', 'shapenet_chair', | |
| 'Dataset name that is to be used for training and evaluation.') | |
| flags.DEFINE_integer('z_dim', 512, '') | |
| flags.DEFINE_integer('f_dim', 64, '') | |
| flags.DEFINE_integer('fc_dim', 1024, '') | |
| flags.DEFINE_integer('num_views', 24, 'Num of viewpoints in the input data.') | |
| flags.DEFINE_integer('image_size', 64, | |
| 'Input images dimension (pixels) - width & height.') | |
| flags.DEFINE_integer('vox_size', 32, 'Voxel prediction dimension.') | |
| flags.DEFINE_integer('step_size', 24, 'Steps to take in rotation to fetch viewpoints.') | |
| flags.DEFINE_integer('batch_size', 6, 'Batch size while training.') | |
| flags.DEFINE_float('focal_length', 0.866, 'Focal length parameter used in perspective projection.') | |
| flags.DEFINE_float('focal_range', 1.732, 'Focal length parameter used in perspective projection.') | |
| flags.DEFINE_string('encoder_name', 'ptn_encoder', | |
| 'Name of the encoder network being used.') | |
| flags.DEFINE_string('decoder_name', 'ptn_vox_decoder', | |
| 'Name of the decoder network being used.') | |
| flags.DEFINE_string('projector_name', 'perspective_projector', | |
| 'Name of the projector network being used.') | |
| # Save options | |
| flags.DEFINE_string('checkpoint_dir', '/tmp/ptn_train/', | |
| 'Directory path for saving trained models and other data.') | |
| flags.DEFINE_string('model_name', 'ptn_finetune', | |
| 'Name of the model used in naming the TF job. Must be different for each run.') | |
| flags.DEFINE_string('init_model', None, | |
| 'Checkpoint path of the model to initialize with.') | |
| flags.DEFINE_integer('save_every', 1000, | |
| 'Average period of steps after which we save a model.') | |
| # Optimization | |
| flags.DEFINE_float('proj_weight', 10, 'Weighting factor for projection loss.') | |
| flags.DEFINE_float('volume_weight', 0, 'Weighting factor for volume loss.') | |
| flags.DEFINE_float('viewpoint_weight', 1, 'Weighting factor for viewpoint loss.') | |
| flags.DEFINE_float('learning_rate', 0.0001, 'Learning rate.') | |
| flags.DEFINE_float('weight_decay', 0.001, 'Weight decay parameter while training.') | |
| flags.DEFINE_float('clip_gradient_norm', 0, 'Gradient clim norm, leave 0 if no gradient clipping.') | |
| flags.DEFINE_integer('max_number_of_steps', 10000, 'Maximum number of steps for training.') | |
| # Summary | |
| flags.DEFINE_integer('save_summaries_secs', 15, 'Seconds interval for dumping TF summaries.') | |
| flags.DEFINE_integer('save_interval_secs', 60 * 5, 'Seconds interval to save models.') | |
| # Scheduling | |
| flags.DEFINE_string('master', '', 'The address of the tensorflow master') | |
| flags.DEFINE_bool('sync_replicas', False, 'Whether to sync gradients between replicas for optimizer.') | |
| flags.DEFINE_integer('worker_replicas', 1, 'Number of worker replicas (train tasks).') | |
| flags.DEFINE_integer('backup_workers', 0, 'Number of backup workers.') | |
| flags.DEFINE_integer('ps_tasks', 0, 'Number of ps tasks.') | |
| flags.DEFINE_integer('task', 0, | |
| 'Task identifier flag to be set for each task running in distributed manner. Task number 0 ' | |
| 'will be chosen as the chief.') | |
| FLAGS = flags.FLAGS | |
| def main(_): | |
| train_dir = os.path.join(FLAGS.checkpoint_dir, FLAGS.model_name, 'train') | |
| save_image_dir = os.path.join(train_dir, 'images') | |
| if not os.path.exists(train_dir): | |
| os.makedirs(train_dir) | |
| if not os.path.exists(save_image_dir): | |
| os.makedirs(save_image_dir) | |
| g = tf.Graph() | |
| with g.as_default(): | |
| with tf.device(tf.train.replica_device_setter(FLAGS.ps_tasks)): | |
| global_step = slim.get_or_create_global_step() | |
| ########### | |
| ## model ## | |
| ########### | |
| model = model_ptn.model_PTN(FLAGS) | |
| ########## | |
| ## data ## | |
| ########## | |
| train_data = model.get_inputs( | |
| FLAGS.inp_dir, | |
| FLAGS.dataset_name, | |
| 'train', | |
| FLAGS.batch_size, | |
| FLAGS.image_size, | |
| FLAGS.vox_size, | |
| is_training=True) | |
| inputs = model.preprocess(train_data, FLAGS.step_size) | |
| ############## | |
| ## model_fn ## | |
| ############## | |
| model_fn = model.get_model_fn( | |
| is_training=True, reuse=False, run_projection=True) | |
| outputs = model_fn(inputs) | |
| ################## | |
| ## train_scopes ## | |
| ################## | |
| if FLAGS.init_model: | |
| train_scopes = ['decoder'] | |
| init_scopes = ['encoder'] | |
| else: | |
| train_scopes = ['encoder', 'decoder'] | |
| ########## | |
| ## loss ## | |
| ########## | |
| task_loss = model.get_loss(inputs, outputs) | |
| regularization_loss = model.get_regularization_loss(train_scopes) | |
| loss = task_loss + regularization_loss | |
| ############### | |
| ## optimizer ## | |
| ############### | |
| optimizer = tf.train.AdamOptimizer(FLAGS.learning_rate) | |
| if FLAGS.sync_replicas: | |
| optimizer = tf.train.SyncReplicasOptimizer( | |
| optimizer, | |
| replicas_to_aggregate=FLAGS.workers_replicas - FLAGS.backup_workers, | |
| total_num_replicas=FLAGS.worker_replicas) | |
| ############## | |
| ## train_op ## | |
| ############## | |
| train_op = model.get_train_op_for_scope(loss, optimizer, train_scopes) | |
| ########### | |
| ## saver ## | |
| ########### | |
| saver = tf.train.Saver(max_to_keep=np.minimum(5, | |
| FLAGS.worker_replicas + 1)) | |
| if FLAGS.task == 0: | |
| params = FLAGS | |
| params.batch_size = params.num_views | |
| params.step_size = 1 | |
| model.set_params(params) | |
| val_data = model.get_inputs( | |
| params.inp_dir, | |
| params.dataset_name, | |
| 'val', | |
| params.batch_size, | |
| params.image_size, | |
| params.vox_size, | |
| is_training=False) | |
| val_inputs = model.preprocess(val_data, params.step_size) | |
| # Note: don't compute loss here | |
| reused_model_fn = model.get_model_fn(is_training=False, reuse=True) | |
| val_outputs = reused_model_fn(val_inputs) | |
| with tf.device(tf.DeviceSpec(device_type='CPU')): | |
| vis_input_images = val_inputs['images_1'] * 255.0 | |
| vis_gt_projs = (val_outputs['masks_1'] * (-1) + 1) * 255.0 | |
| vis_pred_projs = (val_outputs['projs_1'] * (-1) + 1) * 255.0 | |
| vis_gt_projs = tf.concat([vis_gt_projs] * 3, axis=3) | |
| vis_pred_projs = tf.concat([vis_pred_projs] * 3, axis=3) | |
| # rescale | |
| new_size = [FLAGS.image_size] * 2 | |
| vis_gt_projs = tf.image.resize_nearest_neighbor( | |
| vis_gt_projs, new_size) | |
| vis_pred_projs = tf.image.resize_nearest_neighbor( | |
| vis_pred_projs, new_size) | |
| # flip | |
| # vis_gt_projs = utils.image_flipud(vis_gt_projs) | |
| # vis_pred_projs = utils.image_flipud(vis_pred_projs) | |
| # vis_gt_projs is of shape [batch, height, width, channels] | |
| write_disk_op = model.write_disk_grid( | |
| global_step=global_step, | |
| log_dir=save_image_dir, | |
| input_images=vis_input_images, | |
| gt_projs=vis_gt_projs, | |
| pred_projs=vis_pred_projs, | |
| input_voxels=val_inputs['voxels'], | |
| output_voxels=val_outputs['voxels_1']) | |
| with tf.control_dependencies([write_disk_op]): | |
| train_op = tf.identity(train_op) | |
| ############# | |
| ## init_fn ## | |
| ############# | |
| if FLAGS.init_model: | |
| init_fn = model.get_init_fn(init_scopes) | |
| else: | |
| init_fn = None | |
| ############## | |
| ## training ## | |
| ############## | |
| slim.learning.train( | |
| train_op=train_op, | |
| logdir=train_dir, | |
| init_fn=init_fn, | |
| master=FLAGS.master, | |
| is_chief=(FLAGS.task == 0), | |
| number_of_steps=FLAGS.max_number_of_steps, | |
| saver=saver, | |
| save_summaries_secs=FLAGS.save_summaries_secs, | |
| save_interval_secs=FLAGS.save_interval_secs) | |
| if __name__ == '__main__': | |
| app.run() | |