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inpaint_model.py
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inpaint_model.py
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""" common model for DCGAN """
import logging
import cv2
import neuralgym as ng
import tensorflow as tf
from tensorflow.contrib.framework.python.ops import arg_scope
from neuralgym.models import Model
from neuralgym.ops.summary_ops import scalar_summary, images_summary
from neuralgym.ops.summary_ops import gradients_summary
from neuralgym.ops.layers import flatten, resize
from neuralgym.ops.gan_ops import gan_hinge_loss
from neuralgym.ops.gan_ops import random_interpolates
from inpaint_ops import gen_conv, gen_deconv, dis_conv
from inpaint_ops import random_bbox, bbox2mask, local_patch, brush_stroke_mask
from inpaint_ops import resize_mask_like, contextual_attention
logger = logging.getLogger()
class InpaintCAModel(Model):
def __init__(self):
super().__init__('InpaintCAModel')
def build_inpaint_net(self, x, mask, reuse=False,
training=True, padding='SAME', name='inpaint_net'):
"""Inpaint network.
Args:
x: incomplete image, [-1, 1]
mask: mask region {0, 1}
Returns:
[-1, 1] as predicted image
"""
xin = x
offset_flow = None
ones_x = tf.ones_like(x)[:, :, :, 0:1]
x = tf.concat([x, ones_x, ones_x*mask], axis=3)
# two stage network
cnum = 48
with tf.variable_scope(name, reuse=reuse), \
arg_scope([gen_conv, gen_deconv],
training=training, padding=padding):
# stage1
x = gen_conv(x, cnum, 5, 1, name='conv1')
x = gen_conv(x, 2*cnum, 3, 2, name='conv2_downsample')
x = gen_conv(x, 2*cnum, 3, 1, name='conv3')
x = gen_conv(x, 4*cnum, 3, 2, name='conv4_downsample')
x = gen_conv(x, 4*cnum, 3, 1, name='conv5')
x = gen_conv(x, 4*cnum, 3, 1, name='conv6')
mask_s = resize_mask_like(mask, x)
x = gen_conv(x, 4*cnum, 3, rate=2, name='conv7_atrous')
x = gen_conv(x, 4*cnum, 3, rate=4, name='conv8_atrous')
x = gen_conv(x, 4*cnum, 3, rate=8, name='conv9_atrous')
x = gen_conv(x, 4*cnum, 3, rate=16, name='conv10_atrous')
x = gen_conv(x, 4*cnum, 3, 1, name='conv11')
x = gen_conv(x, 4*cnum, 3, 1, name='conv12')
x = gen_deconv(x, 2*cnum, name='conv13_upsample')
x = gen_conv(x, 2*cnum, 3, 1, name='conv14')
x = gen_deconv(x, cnum, name='conv15_upsample')
x = gen_conv(x, cnum//2, 3, 1, name='conv16')
x = gen_conv(x, 3, 3, 1, activation=None, name='conv17')
x = tf.nn.tanh(x)
x_stage1 = x
# stage2, paste result as input
x = x*mask + xin[:, :, :, 0:3]*(1.-mask)
x.set_shape(xin[:, :, :, 0:3].get_shape().as_list())
# conv branch
# xnow = tf.concat([x, ones_x, ones_x*mask], axis=3)
xnow = x
x = gen_conv(xnow, cnum, 5, 1, name='xconv1')
x = gen_conv(x, cnum, 3, 2, name='xconv2_downsample')
x = gen_conv(x, 2*cnum, 3, 1, name='xconv3')
x = gen_conv(x, 2*cnum, 3, 2, name='xconv4_downsample')
x = gen_conv(x, 4*cnum, 3, 1, name='xconv5')
x = gen_conv(x, 4*cnum, 3, 1, name='xconv6')
x = gen_conv(x, 4*cnum, 3, rate=2, name='xconv7_atrous')
x = gen_conv(x, 4*cnum, 3, rate=4, name='xconv8_atrous')
x = gen_conv(x, 4*cnum, 3, rate=8, name='xconv9_atrous')
x = gen_conv(x, 4*cnum, 3, rate=16, name='xconv10_atrous')
x_hallu = x
# attention branch
x = gen_conv(xnow, cnum, 5, 1, name='pmconv1')
x = gen_conv(x, cnum, 3, 2, name='pmconv2_downsample')
x = gen_conv(x, 2*cnum, 3, 1, name='pmconv3')
x = gen_conv(x, 4*cnum, 3, 2, name='pmconv4_downsample')
x = gen_conv(x, 4*cnum, 3, 1, name='pmconv5')
x = gen_conv(x, 4*cnum, 3, 1, name='pmconv6',
activation=tf.nn.relu)
x, offset_flow = contextual_attention(x, x, mask_s, 3, 1, rate=2)
x = gen_conv(x, 4*cnum, 3, 1, name='pmconv9')
x = gen_conv(x, 4*cnum, 3, 1, name='pmconv10')
pm = x
x = tf.concat([x_hallu, pm], axis=3)
x = gen_conv(x, 4*cnum, 3, 1, name='allconv11')
x = gen_conv(x, 4*cnum, 3, 1, name='allconv12')
x = gen_deconv(x, 2*cnum, name='allconv13_upsample')
x = gen_conv(x, 2*cnum, 3, 1, name='allconv14')
x = gen_deconv(x, cnum, name='allconv15_upsample')
x = gen_conv(x, cnum//2, 3, 1, name='allconv16')
x = gen_conv(x, 3, 3, 1, activation=None, name='allconv17')
x = tf.nn.tanh(x)
x_stage2 = x
return x_stage1, x_stage2, offset_flow
def build_sn_patch_gan_discriminator(self, x, reuse=False, training=True):
with tf.variable_scope('sn_patch_gan', reuse=reuse):
cnum = 64
x = dis_conv(x, cnum, name='conv1', training=training)
x = dis_conv(x, cnum*2, name='conv2', training=training)
x = dis_conv(x, cnum*4, name='conv3', training=training)
x = dis_conv(x, cnum*4, name='conv4', training=training)
x = dis_conv(x, cnum*4, name='conv5', training=training)
x = dis_conv(x, cnum*4, name='conv6', training=training)
x = flatten(x, name='flatten')
return x
def build_gan_discriminator(
self, batch, reuse=False, training=True):
with tf.variable_scope('discriminator', reuse=reuse):
d = self.build_sn_patch_gan_discriminator(
batch, reuse=reuse, training=training)
return d
def build_graph_with_losses(
self, FLAGS, batch_data, training=True, summary=False,
reuse=False):
if FLAGS.guided:
batch_data, edge = batch_data
edge = edge[:, :, :, 0:1] / 255.
edge = tf.cast(edge > FLAGS.edge_threshold, tf.float32)
batch_pos = batch_data / 127.5 - 1.
# generate mask, 1 represents masked point
bbox = random_bbox(FLAGS)
regular_mask = bbox2mask(FLAGS, bbox, name='mask_c')
irregular_mask = brush_stroke_mask(FLAGS, name='mask_c')
mask = tf.cast(
tf.logical_or(
tf.cast(irregular_mask, tf.bool),
tf.cast(regular_mask, tf.bool),
),
tf.float32
)
batch_incomplete = batch_pos*(1.-mask)
if FLAGS.guided:
edge = edge * mask
xin = tf.concat([batch_incomplete, edge], axis=3)
else:
xin = batch_incomplete
x1, x2, offset_flow = self.build_inpaint_net(
xin, mask, reuse=reuse, training=training,
padding=FLAGS.padding)
batch_predicted = x2
losses = {}
# apply mask and complete image
batch_complete = batch_predicted*mask + batch_incomplete*(1.-mask)
# local patches
losses['ae_loss'] = FLAGS.l1_loss_alpha * tf.reduce_mean(tf.abs(batch_pos - x1))
losses['ae_loss'] += FLAGS.l1_loss_alpha * tf.reduce_mean(tf.abs(batch_pos - x2))
if summary:
scalar_summary('losses/ae_loss', losses['ae_loss'])
if FLAGS.guided:
viz_img = [
batch_pos,
batch_incomplete + edge,
batch_complete]
else:
viz_img = [batch_pos, batch_incomplete, batch_complete]
if offset_flow is not None:
viz_img.append(
resize(offset_flow, scale=4,
func=tf.image.resize_bilinear))
images_summary(
tf.concat(viz_img, axis=2),
'raw_incomplete_predicted_complete', FLAGS.viz_max_out)
# gan
batch_pos_neg = tf.concat([batch_pos, batch_complete], axis=0)
if FLAGS.gan_with_mask:
batch_pos_neg = tf.concat([batch_pos_neg, tf.tile(mask, [FLAGS.batch_size*2, 1, 1, 1])], axis=3)
if FLAGS.guided:
# conditional GANs
batch_pos_neg = tf.concat([batch_pos_neg, tf.tile(edge, [2, 1, 1, 1])], axis=3)
# wgan with gradient penalty
if FLAGS.gan == 'sngan':
pos_neg = self.build_gan_discriminator(batch_pos_neg, training=training, reuse=reuse)
pos, neg = tf.split(pos_neg, 2)
g_loss, d_loss = gan_hinge_loss(pos, neg)
losses['g_loss'] = g_loss
losses['d_loss'] = d_loss
else:
raise NotImplementedError('{} not implemented.'.format(FLAGS.gan))
if summary:
# summary the magnitude of gradients from different losses w.r.t. predicted image
gradients_summary(losses['g_loss'], batch_predicted, name='g_loss')
gradients_summary(losses['g_loss'], x2, name='g_loss_to_x2')
# gradients_summary(losses['ae_loss'], x1, name='ae_loss_to_x1')
gradients_summary(losses['ae_loss'], x2, name='ae_loss_to_x2')
losses['g_loss'] = FLAGS.gan_loss_alpha * losses['g_loss']
if FLAGS.ae_loss:
losses['g_loss'] += losses['ae_loss']
g_vars = tf.get_collection(
tf.GraphKeys.TRAINABLE_VARIABLES, 'inpaint_net')
d_vars = tf.get_collection(
tf.GraphKeys.TRAINABLE_VARIABLES, 'discriminator')
return g_vars, d_vars, losses
def build_infer_graph(self, FLAGS, batch_data, bbox=None, name='val'):
"""
"""
if FLAGS.guided:
batch_data, edge = batch_data
edge = edge[:, :, :, 0:1] / 255.
edge = tf.cast(edge > FLAGS.edge_threshold, tf.float32)
regular_mask = bbox2mask(FLAGS, bbox, name='mask_c')
irregular_mask = brush_stroke_mask(FLAGS, name='mask_c')
mask = tf.cast(
tf.logical_or(
tf.cast(irregular_mask, tf.bool),
tf.cast(regular_mask, tf.bool),
),
tf.float32
)
batch_pos = batch_data / 127.5 - 1.
batch_incomplete = batch_pos*(1.-mask)
if FLAGS.guided:
edge = edge * mask
xin = tf.concat([batch_incomplete, edge], axis=3)
else:
xin = batch_incomplete
# inpaint
x1, x2, offset_flow = self.build_inpaint_net(
xin, mask, reuse=True,
training=False, padding=FLAGS.padding)
batch_predicted = x2
# apply mask and reconstruct
batch_complete = batch_predicted*mask + batch_incomplete*(1.-mask)
# global image visualization
if FLAGS.guided:
viz_img = [
batch_pos,
batch_incomplete + edge,
batch_complete]
else:
viz_img = [batch_pos, batch_incomplete, batch_complete]
if offset_flow is not None:
viz_img.append(
resize(offset_flow, scale=4,
func=tf.image.resize_bilinear))
images_summary(
tf.concat(viz_img, axis=2),
name+'_raw_incomplete_complete', FLAGS.viz_max_out)
return batch_complete
def build_static_infer_graph(self, FLAGS, batch_data, name):
"""
"""
# generate mask, 1 represents masked point
bbox = (tf.constant(FLAGS.height//2), tf.constant(FLAGS.width//2),
tf.constant(FLAGS.height), tf.constant(FLAGS.width))
return self.build_infer_graph(FLAGS, batch_data, bbox, name)
def build_server_graph(self, FLAGS, batch_data, reuse=False, is_training=False):
"""
"""
# generate mask, 1 represents masked point
if FLAGS.guided:
batch_raw, edge, masks_raw = tf.split(batch_data, 3, axis=2)
edge = edge[:, :, :, 0:1] / 255.
edge = tf.cast(edge > FLAGS.edge_threshold, tf.float32)
else:
batch_raw, masks_raw = tf.split(batch_data, 2, axis=2)
masks = tf.cast(masks_raw[0:1, :, :, 0:1] > 127.5, tf.float32)
batch_pos = batch_raw / 127.5 - 1.
batch_incomplete = batch_pos * (1. - masks)
if FLAGS.guided:
edge = edge * masks[:, :, :, 0:1]
xin = tf.concat([batch_incomplete, edge], axis=3)
else:
xin = batch_incomplete
# inpaint
x1, x2, flow = self.build_inpaint_net(
xin, masks, reuse=reuse, training=is_training)
batch_predict = x2
# apply mask and reconstruct
batch_complete = batch_predict*masks + batch_incomplete*(1-masks)
return batch_complete