from __future__ import absolute_import from __future__ import division from __future__ import print_function import os import random import sys import paddle import argparse import functools import time import numpy as np from scipy.misc import imsave import paddle.fluid as fluid import data_reader from utility import add_arguments, print_arguments, ImagePool from trainer import * from paddle.fluid.dygraph.base import to_variable import six parser = argparse.ArgumentParser(description=__doc__) add_arg = functools.partial(add_arguments, argparser=parser) # yapf: disable add_arg('batch_size', int, 1, "Minibatch size.") add_arg('epoch', int, 200, "The number of epoched to be trained.") add_arg('output', str, "./output_0", "The directory the model and the test result to be saved to.") add_arg('init_model', str, None, "The init model file of directory.") add_arg('save_checkpoints', bool, True, "Whether to save checkpoints.") # yapf: enable lambda_A = 10.0 lambda_B = 10.0 lambda_identity = 0.5 tep_per_epoch = 2974 def optimizer_setting(): lr=0.0002 optimizer = fluid.optimizer.Adam( learning_rate=fluid.layers.piecewise_decay( boundaries=[ 100 * step_per_epoch, 120 * step_per_epoch, 140 * step_per_epoch, 160 * step_per_epoch, 180 * step_per_epoch ], values=[ lr , lr * 0.8, lr * 0.6, lr * 0.4, lr * 0.2, lr * 0.1 ]), beta1=0.5) return optimizer def train(args): with fluid.dygraph.guard(): max_images_num = data_reader.max_images_num() shuffle = True data_shape = [-1] + data_reader.image_shape() print(data_shape) A_pool = ImagePool() B_pool = ImagePool() A_reader = paddle.batch( data_reader.a_reader(shuffle=shuffle), args.batch_size)() B_reader = paddle.batch( data_reader.b_reader(shuffle=shuffle), args.batch_size)() A_test_reader = data_reader.a_test_reader() B_test_reader = data_reader.b_test_reader() cycle_gan = Cycle_Gan("cycle_gan",istrain=True) losses = [[], []] t_time = 0 optimizer1 = optimizer_setting() optimizer2 = optimizer_setting() optimizer3 = optimizer_setting() for epoch in range(args.epoch): batch_id = 0 for i in range(max_images_num): data_A = next(A_reader) data_B = next(B_reader) s_time = time.time() data_A = np.array([data_A[0].reshape(3,256,256)]).astype("float32") data_B = np.array([data_B[0].reshape(3,256,256)]).astype("float32") data_A = to_variable(data_A) data_B = to_variable(data_B) # optimize the g_A network fake_A,fake_B,cyc_A,cyc_B,g_A_loss,g_B_loss,idt_loss_A,idt_loss_B,cyc_A_loss,cyc_B_loss,g_loss = cycle_gan(data_A,data_B,True,False,False) g_loss_out = g_loss.numpy() g_loss.backward() vars_G = [] for param in cycle_gan.parameters(): if param.name[:52]=="cycle_gan/Cycle_Gan_0/build_generator_resnet_9blocks": vars_G.append(param) optimizer1.minimize(g_loss,parameter_list=vars_G) cycle_gan.clear_gradients() fake_pool_B = B_pool.pool_image(fake_B).numpy() fake_pool_B = np.array([fake_pool_B[0].reshape(3,256,256)]).astype("float32") fake_pool_B = to_variable(fake_pool_B) fake_pool_A = A_pool.pool_image(fake_A).numpy() fake_pool_A = np.array([fake_pool_A[0].reshape(3,256,256)]).astype("float32") fake_pool_A = to_variable(fake_pool_A) # optimize the d_A network rec_B, fake_pool_rec_B = cycle_gan(data_B,fake_pool_B,False,True,False) d_loss_A = (fluid.layers.square(fake_pool_rec_B) + fluid.layers.square(rec_B - 1)) / 2.0 d_loss_A = fluid.layers.reduce_mean(d_loss_A) d_loss_A.backward() vars_da = [] for param in cycle_gan.parameters(): if param.name[:47]=="cycle_gan/Cycle_Gan_0/build_gen_discriminator_0": vars_da.append(param) optimizer2.minimize(d_loss_A,parameter_list=vars_da) cycle_gan.clear_gradients() # optimize the d_B network rec_A, fake_pool_rec_A = cycle_gan(data_A,fake_pool_A,False,False,True) d_loss_B = (fluid.layers.square(fake_pool_rec_A) + fluid.layers.square(rec_A - 1)) / 2.0 d_loss_B = fluid.layers.reduce_mean(d_loss_B) d_loss_B.backward() vars_db = [] for param in cycle_gan.parameters(): if param.name[:47]=="cycle_gan/Cycle_Gan_0/build_gen_discriminator_1": vars_db.append(param) optimizer3.minimize(d_loss_B,parameter_list=vars_db) cycle_gan.clear_gradients() batch_time = time.time() - s_time t_time += batch_time print( "epoch{}; batch{}; g_loss:{}; d_A_loss: {}; d_B_loss:{} ; \n g_A_loss: {}; g_A_cyc_loss: {}; g_A_idt_loss: {}; g_B_loss: {}; g_B_cyc_loss: {}; g_B_idt_loss: {};Batch_time_cost: {:.2f}".format(epoch, batch_id,g_loss_out[0],d_loss_A.numpy()[0], d_loss_B.numpy()[0],g_A_loss.numpy()[0],cyc_A_loss.numpy()[0], idt_loss_A.numpy()[0], g_B_loss.numpy()[0],cyc_B_loss.numpy()[0],idt_loss_B.numpy()[0], batch_time)) with open('logging_train.txt', 'a') as log_file: now = time.strftime("%c") log_file.write( "time: {}; epoch{}; batch{}; d_A_loss: {}; g_A_loss: {}; \ g_A_cyc_loss: {}; g_A_idt_loss: {}; d_B_loss: {}; \ g_B_loss: {}; g_B_cyc_loss: {}; g_B_idt_loss: {}; \ Batch_time_cost: {:.2f}\n".format(now, epoch, \ batch_id, d_loss_A[0], g_A_loss[ 0], cyc_A_loss[0], \ idt_loss_A[0], d_loss_B[0], g_A_loss[0], \ cyc_B_loss[0], idt_loss_B[0], batch_time)) losses[0].append(g_A_loss[0]) losses[1].append(d_loss_A[0]) sys.stdout.flush() batch_id += 1 if args.save_checkpoints: fluid.dygraph.save_persistables(cycle_gan.state_dict(),args.output+"/checkpoints/{}".format(epoch)) if __name__ == "__main__": args = parser.parse_args() print_arguments(args) train(args)