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train.py
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train.py
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#!/usr/bin/env python
# ----------------------------------------------------------------
# 3D-Conv-2D-Pool-UNet Training
# Written by Haiyang Jiang
# Mar 1st 2019
# ----------------------------------------------------------------
from __future__ import division
import os, time, glob
import cv2
import numpy as np
import tensorflow as tf
import tensorflow.contrib.slim as slim
from skvideo.io import vwrite
from network import network
from config import *
# get train IDs
with open(FILE_LIST) as f:
text = f.readlines()
train_files = text
train_ids = [line.strip().split(' ')[0] for line in train_files]
gt_files = [line.strip().split(' ')[1] for line in train_files]
in_files = [line.strip().split(' ')[2] for line in train_files]
# get validation set IDs
with open(VALID_LIST) as f:
text = f.readlines()
validate_files = text
valid_ids = [line.strip().split(' ')[0] for line in validate_files]
valid_gt_files = [line.strip().split(' ')[1] for line in validate_files]
valid_in_files = [line.strip().split(' ')[2] for line in validate_files]
raw = np.load(in_files[0])
F = raw.shape[0]
H = raw.shape[1]
W = raw.shape[2]
if DEBUG:
print '[DEBUG] input shape:', F, H, W
SAVE_FREQ = 2
train_ids = train_ids[0:250]
print len(train_ids)
MAX_EPOCH = 50
def demosaic(in_vid, converter=cv2.COLOR_BayerGB2BGR):
bayer_input = np.zeros([in_vid.shape[0], in_vid.shape[1] * 2, in_vid.shape[2] * 2])
bayer_input[:, ::2, ::2] = in_vid[:, :, :, 0]
bayer_input[:, ::2, 1::2] = in_vid[:, :, :, 1]
bayer_input[:, 1::2, ::2] = in_vid[:, :, :, 2]
bayer_input[:, 1::2, 1::2] = in_vid[:, :, :, 3]
bayer_input = (bayer_input * 65535).astype('uint16')
rgb_input = np.zeros([bayer_input.shape[0], bayer_input.shape[1], bayer_input.shape[2], 3])
for j in range(bayer_input.shape[0]):
rgb_input[j] = cv2.cvtColor(bayer_input[j], converter)
return rgb_input / 65535.0
def crop(raw, gt_raw, start_frame=0):
# inputs must be in a form of [batch_num, frame_num, height, width, channel_num]
tt = start_frame
xx = np.random.randint(0, W - CROP_WIDTH)
yy = np.random.randint(0, H - CROP_HEIGHT)
input_patch = raw[:, tt:tt + CROP_FRAME, yy:yy + CROP_HEIGHT, xx:xx + CROP_WIDTH, :]
gt_patch = gt_raw[:, tt:tt + CROP_FRAME, yy * 2:(yy + CROP_HEIGHT) * 2, xx * 2:(xx + CROP_WIDTH) * 2, :]
return input_patch, gt_patch
def flip(input_patch, gt_patch):
# inputs must be in a form of [batch_num, frame_num, height, width, channel_num]
if np.random.randint(2, size=1)[0] == 1: # random flip
input_patch = np.flip(input_patch, axis=1)
gt_patch = np.flip(gt_patch, axis=1)
if np.random.randint(2, size=1)[0] == 1:
input_patch = np.flip(input_patch, axis=2)
gt_patch = np.flip(gt_patch, axis=2)
if np.random.randint(2, size=1)[0] == 1:
input_patch = np.flip(input_patch, axis=3)
gt_patch = np.flip(gt_patch, axis=3)
if np.random.randint(2, size=1)[0] == 1: # random transpose
input_patch = np.transpose(input_patch, (0, 1, 3, 2, 4))
gt_patch = np.transpose(gt_patch, (0, 1, 3, 2, 4))
return input_patch, gt_patch
def validate(in_path, gt_path, sess, G_loss, out_image, in_image, gt_image):
read_in = np.load(in_path)
# 16 bit
raw = np.expand_dims(read_in / 65535.0, axis=0)
gt_raw = np.expand_dims(np.float32(np.load(gt_path) / 255.0), axis=0)
input_patch, gt_patch = crop(raw, gt_raw, np.random.randint(ALL_FRAME - CROP_FRAME))
input_patch, gt_patch = flip(input_patch, gt_patch)
input_patch = np.minimum(input_patch, 1.0)
loss, output = sess.run([G_loss, out_image], feed_dict={in_image: input_patch, gt_image: gt_patch})
return loss
def main():
sess = tf.Session()
in_image = tf.placeholder(tf.float32, [None, CROP_FRAME, None, None, 4])
gt_image = tf.placeholder(tf.float32, [None, CROP_FRAME, None, None, 3])
out_image = network(in_image)
if DEBUG:
print '[DEBUG] out_image shape:', out_image.shape
G_loss = tf.reduce_mean(tf.abs(out_image - gt_image))
v_loss = tf.Variable(0.0)
# tensorboard summary
tf.summary.scalar('loss', v_loss)
# tf.summary.scalar('validation loss', v_loss)
summary_op = tf.summary.merge_all()
writer = tf.summary.FileWriter(os.path.join(LOGS_DIR, TRAIN_LOG_DIR), graph=tf.get_default_graph())
writer_val = tf.summary.FileWriter(os.path.join(LOGS_DIR, VAL_LOG_DIR), graph=tf.get_default_graph())
t_vars = tf.trainable_variables()
lr = tf.placeholder(tf.float32)
G_opt = tf.train.AdamOptimizer(learning_rate=lr).minimize(G_loss)
saver = tf.train.Saver()
sess.run(tf.global_variables_initializer())
ckpt = tf.train.get_checkpoint_state(CHECKPOINT_DIR)
if ckpt:
print('loaded ' + ckpt.model_checkpoint_path)
saver.restore(sess, ckpt.model_checkpoint_path)
if not os.path.isdir(CHECKPOINT_DIR):
os.makedirs(CHECKPOINT_DIR)
# Raw data takes long time to load. Keep them in memory after loaded.
gt_images = [None] * len(train_ids)
input_images = [None] * len(train_ids)
g_loss = np.zeros((len(train_ids), 1))
lastepoch = 0
if not os.path.isdir(RESULT_DIR):
os.makedirs(RESULT_DIR)
else:
all_items = glob.glob(os.path.join(RESULT_DIR, '*'))
all_folders = [os.path.basename(d) for d in all_items if os.path.isdir(d) and os.path.basename(d).isdigit()]
for folder in all_folders:
lastepoch = np.maximum(lastepoch, int(folder))
learning_rate = INIT_LR
np.random.seed(ord('c') + 137)
count = 0
for epoch in range(lastepoch + 1, MAX_EPOCH + 1):
if epoch % SAVE_FREQ == 0:
save_results = True
if not os.path.isdir(RESULT_DIR + '%04d' % epoch):
os.makedirs(RESULT_DIR + '%04d' % epoch)
else:
save_results = False
cnt = 0
if epoch > DECAY_EPOCH:
learning_rate = DECAY_LR
N = len(train_ids)
all_order = np.random.permutation(N)
last_group = (N // GROUP_NUM) * GROUP_NUM
split_order = np.split(all_order[:last_group], (N // GROUP_NUM))
split_order.append(all_order[last_group:])
for order in split_order:
gt_images = [None] * len(train_ids)
input_images = [None] * len(train_ids)
order_frame = [(one, y) for y in [t for t in np.random.permutation(ALL_FRAME - CROP_FRAME) if t % FRAME_FREQ == 0] for one in order]
index = np.random.permutation(len(order_frame))
for idx in index:
ind, start_frame = order_frame[idx]
start_frame += np.random.randint(FRAME_FREQ)
# get the path from image id
train_id = train_ids[ind] + '_start_frame_' + str(start_frame)
in_path = in_files[ind]
gt_path = gt_files[ind]
st = time.time()
cnt += 1
if input_images[ind] is None:
read_in = np.load(in_path)
# 16 bit
input_images[ind] = np.expand_dims(read_in / 65535.0, axis=0)
raw = input_images[ind]
# raw = np.expand_dims(raw / 65535.0, axis=0)
if gt_images[ind] is None:
gt_images[ind] = np.expand_dims(np.float32(np.load(gt_path) / 255.0), axis=0)
gt_raw = gt_images[ind]
# gt_raw = np.expand_dims(np.float32(gt_raw / 255.0), axis=0)
input_patch, gt_patch = crop(raw, gt_raw, start_frame)
input_patch, gt_patch = flip(input_patch, gt_patch)
input_patch = np.minimum(input_patch, 1.0)
_, G_current, output = sess.run([G_opt, G_loss, out_image], feed_dict={in_image: input_patch, gt_image: gt_patch, lr: learning_rate})
output = np.minimum(np.maximum(output, 0), 1)
g_loss[ind] = G_current
# save loss
summary = sess.run(summary_op, feed_dict={v_loss:G_current})
writer.add_summary(summary, count)
count += 1
if save_results and start_frame in SAVE_FRAMES:
temp = np.concatenate((gt_patch[0, :, ::-1, :, :], output[0, :, ::-1, :, :]), axis=2)
try:
vwrite((RESULT_DIR + '%04d/%s_train.avi' % (epoch, train_id)), (temp * 255).astype('uint8'))
except OSError as e:
print('\t', e, 'Skip saving.')
print("%d %d Loss=%.8f Time=%.3f" % (epoch, cnt, np.mean(g_loss[np.where(g_loss)]), time.time() - st)), train_id
# validation after each epoch
v_start = time.time()
losses = []
for i in range(len(valid_in_files)):
in_path = valid_in_files[i]
gt_path = valid_gt_files[i]
loss = validate(in_path, gt_path, sess, G_loss, out_image, in_image, gt_image)
losses += loss,
summary = sess.run(summary_op, feed_dict={v_loss:np.mean(losses)})
writer_val.add_summary(summary, count)
print 'validation: Loss={:.8f} Time={:.3f}s'.format(np.mean(losses), time.time() - v_start)
saver.save(sess, CHECKPOINT_DIR + 'model.ckpt')
if save_results:
saver.save(sess, RESULT_DIR + '%04d/' % epoch + 'model.ckpt')
if __name__ == '__main__':
main()