Skip to content
Snippets Groups Projects
Commit a3f851e1 authored by Dellandrea Emmanuel's avatar Dellandrea Emmanuel
Browse files

Add notebook

parent d68888b8
Branches
No related tags found
No related merge requests found
Expand all Show whitespace changes
Inline Side-by-side
BE2_GAN_and_cGAN.ipynb 0 → 100644
+ 1231
− 0
View file @ a3f851e1
%% Cell type:markdown id: tags:
<h1 ><big><center>MSO 3.4 - Deep Structured Learning</center></big></h1>
<h2><big><center> BE 2 - GANs and cGAN </center></big></h2>
<h5><big><center>Adapted from <i>Projet d'Option</i> of : Mhamed Jabri, Martin Chauvin, Ahmed Sahraoui, Zakariae Moustaïne and Taoufik Bouchikhi
<p align="center">
<img height=300px src="https://cdn-images-1.medium.com/max/1080/0*tJRy5Chmk4XymxwN.png"/></p>
<p align="center"></p>
%% Cell type:markdown id: tags:
The aim of this assignment is to discover GANs, understand how they are implemented and then explore one specific architecture of GANs that allows us to perform image to image translation (which corresponds to the picture that you can see above this text ! )
Before starting the exploration of the world of GANs, here's what students should do and send back for this assignement :
* In the "tutorial" parts of this assignement that focus on explaining new concepts, you'll find <font color='red'>**questions**</font> that aim to test your understanding of those concepts.
* In some of the code cells, you'll have to complete the code and you'll find a "TO DO" explaining what you should implement.
%% Cell type:markdown id: tags:
# Part1: DC-GAN
%% Cell type:markdown id: tags:
In this part, we aim to learn and understand the basic concepts of **Generative Adversarial Networks** through a DCGAN and generate new celebrities from the learned network after showing it real celebrities. For this purpose, please study the tutorial here: https://pytorch.org/tutorials/beginner/dcgan_faces_tutorial.html
%% Cell type:markdown id: tags:
##Work to do
Now we want to generate handwritten digits using the MNIST dataset. It is available within torvision package (https://pytorch.org/vision/stable/generated/torchvision.datasets.MNIST.html#torchvision.datasets.MNIST)
Please re-train the DCGAN and display some automatically generated handwritten digits.
%% Cell type:code id: tags:
``` python
#TO DO: your code here to adapt the code from the tutorial to experiment on MNIST dataset
```
%% Cell type:markdown id: tags:
# Part2: Conditional GAN (cGAN)
%% Cell type:markdown id: tags:
Let's take the example of the set described in the next picture.
![Map to satellite picture](https://raw.githubusercontent.com/Neyri/Projet-cGAN/master/BE/img/map_streetview.png)
We have a picture of a map (from Google Maps) and we want to create an image of what the satellite view may look like.
As we are not only trying to generate a random picture but a mapping between a picture to another one, we can't use the standard GAN architecture. We will then use a cGAN.
A cGAN is a supervised GAN aiming at mapping a label picture to a real one or a real picture to a label one. As you can see in the diagram below, the discriminator will take as input a pair of images and try to predict if the pair was generated or not. The generator will not only generate an image from noise but will also use an image (label or real) to generate another one (real or label).
![Diagram of how a cGan works](https://raw.githubusercontent.com/Neyri/Projet-cGAN/master/BE/img/cgan_map.png)
%% Cell type:markdown id: tags:
### Generator
In the cGAN architecture, the generator chosen is a U-Net.
![U-Net](https://raw.githubusercontent.com/Neyri/Projet-cGAN/master/BE/img/unet.png)
A U-Net takes as input an image, and outputs another image.
It can be divided into 2 subparts : an encoder and a decoder.
* The encoder takes the input image and reduces its dimension to encode the main features into a vector.
* The decoder takes this vector and map the features stored into an image.
A U-Net architecture is different from a classic encoder-decoder in that every layer of the decoder takes as input the previous decoded output as well as the output vector from the encoder layers of the same level. It allows the decoder to map low frequencies information encoded during the descent as well as high frequencies from the original picture.
![U-Net](https://www.researchgate.net/profile/Baris_Turkbey/publication/315514772/figure/fig2/AS:485824962797569@1492841105670/U-net-architecture-Each-box-corresponds-to-a-multi-channel-features-maps-The-number-of.png)
%% Cell type:markdown id: tags:
The architecture we will implement is the following (the number in the square is the number of filters used).
![UNet Architecture](https://raw.githubusercontent.com/Neyri/Projet-cGAN/master/BE/img/unet_architecture.png)
The encoder will take as input a colored picture (3 channels: RGB), it will pass through a series of convolution layers to encode the features of the picture. It will then be decoded by the decoder using transposed convolutional layers. These layers will take as input the previous decoded vector AND the encoded features of the same level.
%% Cell type:markdown id: tags:
Now, let's create or cGAN to generate facades from a template image. For this purpose, we will use the "Facade" dataset available at http://cmp.felk.cvut.cz/~tylecr1/facade/.
%% Cell type:markdown id: tags:
Let's first create a few classes describing the layers we will use in the U-Net.
%% Cell type:code id: tags:
``` python
# Importing all the libraries needed
import matplotlib.pyplot as plt
import imageio
import glob
import random
import os
import numpy as np
import math
import itertools
import time
import datetime
import cv2
from pathlib import Path
from PIL import Image
from torch.utils.data import Dataset, DataLoader
import torchvision.transforms as transforms
from torchvision.utils import save_image, make_grid
from torchvision import datasets
from torch.autograd import Variable
import torch.nn as nn
import torch.nn.functional as F
import torch
```
%% Cell type:code id: tags:
``` python
# code adapted from https://github.com/milesial/Pytorch-UNet/blob/master/unet/unet_parts.py
# Input layer
class inconv(nn.Module):
def __init__(self, in_ch, out_ch):
super(inconv, self).__init__()
self.conv = nn.Sequential(
nn.Conv2d(in_ch, out_ch, kernel_size=4, padding=1, stride=2),
nn.LeakyReLU(negative_slope=0.2, inplace=True)
)
def forward(self, x):
x = self.conv(x)
return x
# Encoder layer
class down(nn.Module):
def __init__(self, in_ch, out_ch):
super(down, self).__init__()
self.conv = nn.Sequential(
nn.Conv2d(in_ch, out_ch, kernel_size=4, padding=1, stride=2),
nn.BatchNorm2d(out_ch),
nn.LeakyReLU(negative_slope=0.2, inplace=True)
)
def forward(self, x):
x = self.conv(x)
return x
# Decoder layer
class up(nn.Module):
def __init__(self, in_ch, out_ch, dropout=False):
super(up, self).__init__()
if dropout :
self.conv = nn.Sequential(
nn.ConvTranspose2d(in_ch, out_ch, kernel_size=4, padding=1, stride=2),
nn.BatchNorm2d(out_ch),
nn.Dropout(0.5, inplace=True),
nn.ReLU(inplace=True)
)
else:
self.conv = nn.Sequential(
nn.ConvTranspose2d(in_ch, out_ch, kernel_size=4, padding=1, stride=2),
nn.BatchNorm2d(out_ch),
nn.ReLU(inplace=True)
)
def forward(self, x1, x2):
x1 = self.conv(x1)
x = torch.cat([x1, x2], dim=1)
return x
# Output layer
class outconv(nn.Module):
def __init__(self, in_ch, out_ch):
super(outconv, self).__init__()
self.conv = nn.Sequential(
nn.ConvTranspose2d(in_ch, out_ch, kernel_size=4, padding=1, stride=2),
nn.Tanh()
)
def forward(self, x):
x = self.conv(x)
return x
```
%% Cell type:markdown id: tags:
Now let's create the U-Net using the helper classes defined previously.
%% Cell type:code id: tags:
``` python
class U_Net(nn.Module):
'''
Ck denotes a Convolution-BatchNorm-ReLU layer with k filters.
CDk denotes a Convolution-BatchNorm-Dropout-ReLU layer with a dropout rate of 50%
Encoder:
C64 - C128 - C256 - C512 - C512 - C512 - C512 - C512
Decoder:
CD512 - CD1024 - CD1024 - C1024 - C1024 - C512 - C256 - C128
'''
def __init__(self, n_channels, n_classes):
super(U_Net, self).__init__()
# Encoder
self.inc = inconv(n_channels, 64) # 64 filters
# TO DO :
# Create the 7 encoder layers called "down1" to "down7" following this sequence
# C64 - C128 - C256 - C512 - C512 - C512 - C512 - C512
# The first one has already been implemented
# Decoder
# TO DO :
# Create the 7 decoder layers called up1 to up7 following this sequence :
# CD512 - CD1024 - CD1024 - C1024 - C1024 - C512 - C256 - C128
# The last layer has already been defined
self.outc = outconv(128, n_classes) # 128 filters
def forward(self, x):
x1 = self.inc(x)
x2 = self.down1(x1)
x3 = self.down2(x2)
x4 = self.down3(x3)
x5 = self.down4(x4)
x6 = self.down5(x5)
x7 = self.down6(x6)
x8 = self.down7(x7)
# At this stage x8 is our encoded vector, we will now decode it
x = self.up7(x8, x7)
x = self.up6(x, x6)
x = self.up5(x, x5)
x = self.up4(x, x4)
x = self.up3(x, x3)
x = self.up2(x, x2)
x = self.up1(x, x1)
x = self.outc(x)
return x
```
%% Cell type:code id: tags:
``` python
# We take images that have 3 channels (RGB) as input and output an image that also have 3 channels (RGB)
generator=U_Net(3,3)
# Check that the architecture is as expected
generator
```
%% Cell type:markdown id: tags:
You should now have a working U-Net.
%% Cell type:markdown id: tags:
<font color='red'>**Question 1**</font>
Knowing the input and output images will be 256x256, what will be the dimension of the encoded vector x8 ?
<font color='red'>**Question 2**</font>
As you can see, U-net has an encoder-decoder architecture with skip connections. Explain why it works better than a traditional encoder-decoder.
%% Cell type:markdown id: tags:
### Discriminator
In the cGAN architecture, the chosen discriminator is a Patch GAN. It is a convolutional discriminator which enables to produce a map of the input pictures where each pixel represents a patch of size NxN of the input.
![patch GAN](https://raw.githubusercontent.com/Neyri/Projet-cGAN/master/BE/img/patchGAN.png)
The size N is given by the depth of the net. According to this table :
| Number of layers | N |
| ---- | ---- |
| 1 | 16 |
| 2 | 34 |
| 3 | 70 |
| 4 | 142 |
| 5 | 286 |
| 6 | 574 |
The number of layers actually means the number of layers with `kernel=(4,4)`, `padding=(1,1)` and `stride=(2,2)`. These layers are followed by 2 layers with `kernel=(4,4)`, `padding=(1,1)` and `stride=(1,1)`.
In our case we are going to create a 70x70 PatchGAN.
%% Cell type:markdown id: tags:
Let's first create a few helping classes.
%% Cell type:code id: tags:
``` python
class conv_block(nn.Module):
def __init__(self, in_ch, out_ch, use_batchnorm=True, stride=2):
super(conv_block, self).__init__()
if use_batchnorm:
self.conv = nn.Sequential(
nn.Conv2d(in_ch, out_ch, kernel_size=4, padding=1, stride=stride),
nn.BatchNorm2d(out_ch),
nn.LeakyReLU(negative_slope=0.2, inplace=True)
)
else:
self.conv = nn.Sequential(
nn.Conv2d(in_ch, out_ch, kernel_size=4, padding=1, stride=stride),
nn.LeakyReLU(negative_slope=0.2, inplace=True)
)
def forward(self, x):
x = self.conv(x)
return x
class out_block(nn.Module):
def __init__(self, in_ch, out_ch):
super(out_block, self).__init__()
self.conv = nn.Sequential(
nn.Conv2d(in_ch, 1, kernel_size=4, padding=1, stride=1),
nn.Sigmoid()
)
def forward(self, x):
x = self.conv(x)
return x
```
%% Cell type:markdown id: tags:
Now let's create the Patch GAN discriminator.
As we want a 70x70 Patch GAN, the architecture will be as follows :
```
1. C64 - K4, P1, S2
2. C128 - K4, P1, S2
3. C256 - K4, P1, S2
4. C512 - K4, P1, S1
5. C1 - K4, P1, S1 (output)
```
Where Ck denotes a convolution block with k filters, Kk a kernel of size k, Pk is the padding size and Sk the stride applied.
*Note :* For the first layer, we do not use batchnorm.
%% Cell type:markdown id: tags:
<font color='red'>**Question 3**</font>
Knowing the input and output images will be 256x256, what will be the dimension of the encoded vector x8 ?Knowing input images will be 256x256 with 3 channels each, how many parameters are there to learn ?
%% Cell type:code id: tags:
``` python
class PatchGAN(nn.Module):
def __init__(self, n_channels, n_classes):
super(PatchGAN, self).__init__()
# TODO :
# create the 4 first layers named conv1 to conv4
self.conv1 =
self.conv2 =
self.conv3 =
self.conv4 =
# output layer
self.out = out_block(512, n_classes)
def forward(self, x1, x2):
x = torch.cat([x2, x1], dim=1)
x = self.conv1(x)
x = self.conv2(x)
x = self.conv3(x)
x = self.conv4(x)
x = self.out(x)
return x
```
%% Cell type:code id: tags:
``` python
# We have 6 input channels as we concatenate 2 images (with 3 channels each)
discriminator = PatchGAN(6,1)
discriminator
```
%% Cell type:markdown id: tags:
You should now have a working discriminator.
%% Cell type:markdown id: tags:
### Loss functions
As we have seen in the choice of the various architectures for this GAN, the issue is to map both low and high frequencies.
To tackle this problem, this GAN rely on the architecture to map the high frequencies (U-Net + PatchGAN) and the loss function to learn low frequencies features. The global loss function will indeed be made of 2 parts :
* the first part to map hight frequencies, will try to optimize the mean squared error of the GAN.
* the second part to map low frequencies, will minimize the $\mathcal{L}_1$ norm of the generated picture.
So the loss can be defined as $$ G^* = arg\ \underset{G}{min}\ \underset{D}{max}\ \mathcal{L}_{cGAN}(G,D) + \lambda \mathcal{L}_1(G)$$
%% Cell type:code id: tags:
``` python
# Loss functions
criterion_GAN = torch.nn.MSELoss()
criterion_pixelwise = torch.nn.L1Loss()
# Loss weight of L1 pixel-wise loss between translated image and real image
lambda_pixel = 100
```
%% Cell type:markdown id: tags:
### Training and evaluating models
%% Cell type:code id: tags:
``` python
# parameters
epoch = 0 # epoch to start training from
n_epoch = 200 # number of epochs of training
batch_size =10 # size of the batches
lr = 0.0002 # adam: learning rate
b1 =0.5 # adam: decay of first order momentum of gradient
b2 = 0.999 # adam: decay of first order momentum of gradient
decay_epoch = 100 # epoch from which to start lr decay
img_height = 256 # size of image height
img_width = 256 # size of image width
channels = 3 # number of image channels
sample_interval = 500 # interval between sampling of images from generators
checkpoint_interval = -1 # interval between model checkpoints
cuda = True if torch.cuda.is_available() else False # do you have cuda ?
```
%% Cell type:markdown id: tags:
Download the dataset.
%% Cell type:code id: tags:
``` python
import urllib.request
from tqdm import tqdm
import os
import zipfile
def download_hook(t):
"""Wraps tqdm instance.
Don't forget to close() or __exit__()
the tqdm instance once you're done with it (easiest using `with` syntax).
Example
-------
>>> with tqdm(...) as t:
... reporthook = my_hook(t)
... urllib.request.urlretrieve(..., reporthook=reporthook)
"""
last_b = [0]
def update_to(b=1, bsize=1, tsize=None):
"""
b : int, optional
Number of blocks transferred so far [default: 1].
bsize : int, optional
Size of each block (in tqdm units) [default: 1].
tsize : int, optional
Total size (in tqdm units). If [default: None] remains unchanged.
"""
if tsize is not None:
t.total = tsize
t.update((b - last_b[0]) * bsize)
last_b[0] = b
return update_to
def download(url, save_dir):
filename = url.split('/')[-1]
with tqdm(unit = 'B', unit_scale = True, unit_divisor = 1024, miniters = 1, desc = filename) as t:
urllib.request.urlretrieve(url, filename = os.path.join(save_dir, filename), reporthook = download_hook(t), data = None)
if __name__ == '__main__':
# Download ground truth
if not os.path.exists("CMP_facade_DB_base.zip"):
download("http://cmp.felk.cvut.cz/~tylecr1/facade/CMP_facade_DB_base.zip", "./")
# Extract in the correct folder
with zipfile.ZipFile("CMP_facade_DB_base.zip", 'r') as zip_ref:
zip_ref.extractall("./facades")
os.rename("./facades/base", "./facades/train")
# Download ground truth
if not os.path.exists("CMP_facade_DB_extended.zip"):
download("http://cmp.felk.cvut.cz/~tylecr1/facade/CMP_facade_DB_extended.zip", "./")
# Extract in the correct folder
with zipfile.ZipFile("CMP_facade_DB_extended.zip", 'r') as zip_ref:
zip_ref.extractall("./facades")
os.rename("./facades/extended", "./facades/val")
```
%% Cell type:markdown id: tags:
Configure the dataloader
%% Cell type:code id: tags:
``` python
class ImageDataset(Dataset):
def __init__(self, root, transforms_=None, mode='train'):
self.transform = transforms.Compose(transforms_)
self.files_img = sorted(glob.glob(os.path.join(root, mode) + '/*.jpg'))
if mode == 'val':
self.files_img.extend(
sorted(glob.glob(os.path.join(root, 'val') + '/*.jpg')))
self.files_mask = sorted(glob.glob(os.path.join(root, mode) + '/*.png'))
if mode == 'val':
self.files_mask.extend(
sorted(glob.glob(os.path.join(root, 'val') + '/*.png')))
assert len(self.files_img) == len(self.files_mask)
def __getitem__(self, index):
img = Image.open(self.files_img[index % len(self.files_img)])
mask = Image.open(self.files_mask[index % len(self.files_img)])
mask = mask.convert('RGB')
img = self.transform(img)
mask = self.transform(mask)
return img, mask
def __len__(self):
return len(self.files_img)
# Configure dataloaders
transforms_ = [transforms.Resize((img_height, img_width), Image.BICUBIC),
transforms.ToTensor()] # transforms.Normalize((0.5,0.5,0.5), (0.5,0.5,0.5))
dataloader = DataLoader(ImageDataset("facades", transforms_=transforms_),
batch_size=16, shuffle=True)
val_dataloader = DataLoader(ImageDataset("facades", transforms_=transforms_, mode='val'),
batch_size=8, shuffle=False)
# Tensor type
Tensor = torch.cuda.FloatTensor if cuda else torch.FloatTensor
```
%% Cell type:markdown id: tags:
Check the loading works and a few helper functions
%% Cell type:code id: tags:
``` python
def plot2x2Array(image, mask):
f, axarr = plt.subplots(1, 2)
axarr[0].imshow(image)
axarr[1].imshow(mask)
axarr[0].set_title('Image')
axarr[1].set_title('Mask')
def reverse_transform(image):
image = image.numpy().transpose((1, 2, 0))
image = np.clip(image, 0, 1)
image = (image * 255).astype(np.uint8)
return image
def plot2x3Array(image, mask,predict):
f, axarr = plt.subplots(1,3,figsize=(15,15))
axarr[0].imshow(image)
axarr[1].imshow(mask)
axarr[2].imshow(predict)
axarr[0].set_title('input')
axarr[1].set_title('real')
axarr[2].set_title('fake')
```
%% Cell type:code id: tags:
``` python
image, mask = next(iter(dataloader))
image = reverse_transform(image[0])
mask = reverse_transform(mask[0])
plot2x2Array(image, mask)
```
%% Cell type:markdown id: tags:
Initialize our GAN
%% Cell type:code id: tags:
``` python
# Calculate output of image discriminator (PatchGAN)
patch = (1, img_height//2**3-2, img_width//2**3-2)
if cuda:
generator = generator.cuda()
discriminator = discriminator.cuda()
criterion_GAN.cuda()
criterion_pixelwise.cuda()
# Optimizers
optimizer_G = torch.optim.Adam(generator.parameters(), lr=lr, betas=(b1, b2))
optimizer_D = torch.optim.Adam(discriminator.parameters(), lr=lr, betas=(b1, b2))
```
%% Cell type:markdown id: tags:
Start training
%% Cell type:code id: tags:
``` python
def save_model(epoch):
# save your work
torch.save({
'epoch': epoch,
'model_state_dict': generator.state_dict(),
'optimizer_state_dict': optimizer_G.state_dict(),
'loss': loss_G,
}, 'generator_'+str(epoch)+'.pth')
torch.save({
'epoch': epoch,
'model_state_dict': discriminator.state_dict(),
'optimizer_state_dict': optimizer_D.state_dict(),
'loss': loss_D,
}, 'discriminator_'+str(epoch)+'.pth')
def weights_init_normal(m):
classname = m.__class__.__name__
if classname.find('Conv') != -1:
torch.nn.init.normal_(m.weight.data, 0.0, 0.02)
elif classname.find('BatchNorm2d') != -1:
torch.nn.init.normal_(m.weight.data, 1.0, 0.02)
torch.nn.init.constant_(m.bias.data, 0.0)
```
%% Cell type:markdown id: tags:
<font color='red'>Complete the loss function </font> in the following training code and train your network:
%% Cell type:code id: tags:
``` python
# ----------
# Training
# ----------
losses = []
num_epochs = 200
# Initialize weights
generator.apply(weights_init_normal)
discriminator.apply(weights_init_normal)
epoch_D = 0
epoch_G = 0
# train the network
discriminator.train()
generator.train()
print_every = 400
for epoch in range(epoch_G, num_epochs):
for i, batch in enumerate(dataloader):
# Model inputs
real_A = Variable(batch[0].type(Tensor))
real_B = Variable(batch[1].type(Tensor))
# Adversarial ground truths
valid = Variable(Tensor(np.ones((real_B.size(0), *patch))), requires_grad=False)
fake = Variable(Tensor(np.zeros((real_B.size(0), *patch))), requires_grad=False)
# ------------------
# Train Generators
# ------------------
optimizer_G.zero_grad()
# GAN loss
# TO DO: Put here your GAN loss
# Pixel-wise loss
# TO DO: Put here your pixel loss
# Total loss
# TO DO: Put here your total loss
loss_G.backward()
optimizer_G.step()
# ---------------------
# Train Discriminator
# ---------------------
optimizer_D.zero_grad()
# Real loss
pred_real = discriminator(real_A, real_B)
loss_real = criterion_GAN(pred_real, valid)
# Fake loss
pred_fake = discriminator(fake_A.detach(), real_B)
loss_fake = criterion_GAN(pred_fake, fake)
# Total loss
loss_D = 0.5 * (loss_real + loss_fake)
loss_D.backward()
optimizer_D.step()
# Print some loss stats
if i % print_every == 0:
# print discriminator and generator loss
print('Epoch [{:5d}/{:5d}] | d_loss: {:6.4f} | g_loss: {:6.4f}'.format(
epoch+1, num_epochs, loss_D.item(), loss_G.item()))
## AFTER EACH EPOCH##
# append discriminator loss and generator loss
losses.append((loss_D.item(), loss_G.item()))
if epoch % 100 == 0:
print('Saving model...')
save_model(epoch)
```
%% Cell type:markdown id: tags:
Observation of the loss along the training
%% Cell type:code id: tags:
``` python
fig, ax = plt.subplots()
losses = np.array(losses)
plt.plot(losses.T[0], label='Discriminator')
plt.plot(losses.T[1], label='Generator')
plt.title("Training Losses")
plt.legend()
```
%% Cell type:markdown id: tags:
If the training takes too much time, you can use a pretrained model in the meantime, to evaluate its performance.
It is available at : https://partage.liris.cnrs.fr/index.php/s/xwEFmxn9ANeq4zY
%% Cell type:markdown id: tags:
### Evaluate your cGAN
%% Cell type:code id: tags:
``` python
def load_model(epoch=200):
if 'generator_'+str(epoch)+'.pth' in os.listdir() and 'discriminator_'+str(epoch)+'.pth' in os.listdir():
if cuda:
checkpoint_generator = torch.load('generator_'+str(epoch)+'.pth')
else:
checkpoint_generator = torch.load('generator_'+str(epoch)+'.pth', map_location='cpu')
generator.load_state_dict(checkpoint_generator['model_state_dict'])
optimizer_G.load_state_dict(checkpoint_generator['optimizer_state_dict'])
epoch_G = checkpoint_generator['epoch']
loss_G = checkpoint_generator['loss']
if cuda:
checkpoint_discriminator = torch.load('discriminator_'+str(epoch)+'.pth')
else:
checkpoint_discriminator = torch.load('discriminator_'+str(epoch)+'.pth', map_location='cpu')
discriminator.load_state_dict(checkpoint_discriminator['model_state_dict'])
optimizer_D.load_state_dict(checkpoint_discriminator['optimizer_state_dict'])
epoch_D = checkpoint_discriminator['epoch']
loss_D = checkpoint_discriminator['loss']
else:
print('There isn\' a training available with this number of epochs')
```
%% Cell type:code id: tags:
``` python
load_model(epoch=200)
# switching mode
generator.eval()
```
%% Cell type:code id: tags:
``` python
# show a sample evaluation image on the training base
image, mask = next(iter(dataloader))
output = generator(mask.type(Tensor))
output = output.view(16, 3, 256, 256)
output = output.cpu().detach()
for i in range(8):
image_plot = reverse_transform(image[i])
output_plot = reverse_transform(output[i])
mask_plot = reverse_transform(mask[i])
plot2x3Array(mask_plot,image_plot,output_plot)
```
%% Cell type:code id: tags:
``` python
# show a sample evaluation image on the validation dataset
image, mask = next(iter(val_dataloader))
output = generator(mask.type(Tensor))
output = output.view(8, 3, 256, 256)
output = output.cpu().detach()
for i in range(8):
image_plot = reverse_transform(image[i])
output_plot = reverse_transform(output[i])
mask_plot = reverse_transform(mask[i])
plot2x3Array(mask_plot,image_plot,output_plot)
```
%% Cell type:markdown id: tags:
<font color='red'>**Question 4**</font>
Compare results for 100 and 200 epochs
%% Cell type:code id: tags:
``` python
# TO DO : Your code here to load and evaluate with a few samples
# a model after 100 epochs
```
%% Cell type:code id: tags:
``` python
# And finally :
if cuda:
torch.cuda.empty_cache()
```
%% Cell type:markdown id: tags:
# How to submit your Work ?
Your work should be uploaded within 3 weeks into the Moodle section "Devoir 2 - GAN et Conditional GAN". It can be either a notebook containing your code and a description of your work, experiments and results or a ".zip" file containing your report in a "pdf" format describing your work, experiments and results as well as your code (".py" Python files).
BE2_GAN_and_cGAN.py 0 → 100644
+ 689
− 0
View file @ a3f851e1
This diff is collapsed.
README.md
+ 1
− 90
View file @ a3f851e1
# mso3_4-BE2_cGAN
## Getting started
To make it easy for you to get started with GitLab, here's a list of recommended next steps.
Already a pro? Just edit this README.md and make it your own. Want to make it easy? [Use the template at the bottom](#editing-this-readme)!
## Add your files
- [ ] [Create](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#create-a-file) or [upload](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#upload-a-file) files
- [ ] [Add files using the command line](https://docs.gitlab.com/ee/gitlab-basics/add-file.html#add-a-file-using-the-command-line) or push an existing Git repository with the following command:
```
cd existing_repo
git remote add origin https://gitlab.ec-lyon.fr/edelland/mso3_4-be2_cgan.git
git branch -M main
git push -uf origin main
```
## Integrate with your tools
- [ ] [Set up project integrations](https://gitlab.ec-lyon.fr/edelland/mso3_4-be2_cgan/-/settings/integrations)
## Collaborate with your team
- [ ] [Invite team members and collaborators](https://docs.gitlab.com/ee/user/project/members/)
- [ ] [Create a new merge request](https://docs.gitlab.com/ee/user/project/merge_requests/creating_merge_requests.html)
- [ ] [Automatically close issues from merge requests](https://docs.gitlab.com/ee/user/project/issues/managing_issues.html#closing-issues-automatically)
- [ ] [Enable merge request approvals](https://docs.gitlab.com/ee/user/project/merge_requests/approvals/)
- [ ] [Automatically merge when pipeline succeeds](https://docs.gitlab.com/ee/user/project/merge_requests/merge_when_pipeline_succeeds.html)
## Test and Deploy
Use the built-in continuous integration in GitLab.
- [ ] [Get started with GitLab CI/CD](https://docs.gitlab.com/ee/ci/quick_start/index.html)
- [ ] [Analyze your code for known vulnerabilities with Static Application Security Testing(SAST)](https://docs.gitlab.com/ee/user/application_security/sast/)
- [ ] [Deploy to Kubernetes, Amazon EC2, or Amazon ECS using Auto Deploy](https://docs.gitlab.com/ee/topics/autodevops/requirements.html)
- [ ] [Use pull-based deployments for improved Kubernetes management](https://docs.gitlab.com/ee/user/clusters/agent/)
- [ ] [Set up protected environments](https://docs.gitlab.com/ee/ci/environments/protected_environments.html)
***
# Editing this README
When you're ready to make this README your own, just edit this file and use the handy template below (or feel free to structure it however you want - this is just a starting point!). Thank you to [makeareadme.com](https://www.makeareadme.com/) for this template.
## Suggestions for a good README
Every project is different, so consider which of these sections apply to yours. The sections used in the template are suggestions for most open source projects. Also keep in mind that while a README can be too long and detailed, too long is better than too short. If you think your README is too long, consider utilizing another form of documentation rather than cutting out information.
## Name
Choose a self-explaining name for your project.
## Description
Let people know what your project can do specifically. Provide context and add a link to any reference visitors might be unfamiliar with. A list of Features or a Background subsection can also be added here. If there are alternatives to your project, this is a good place to list differentiating factors.
## Badges
On some READMEs, you may see small images that convey metadata, such as whether or not all the tests are passing for the project. You can use Shields to add some to your README. Many services also have instructions for adding a badge.
## Visuals
Depending on what you are making, it can be a good idea to include screenshots or even a video (you'll frequently see GIFs rather than actual videos). Tools like ttygif can help, but check out Asciinema for a more sophisticated method.
## Installation
Within a particular ecosystem, there may be a common way of installing things, such as using Yarn, NuGet, or Homebrew. However, consider the possibility that whoever is reading your README is a novice and would like more guidance. Listing specific steps helps remove ambiguity and gets people to using your project as quickly as possible. If it only runs in a specific context like a particular programming language version or operating system or has dependencies that have to be installed manually, also add a Requirements subsection.
## Usage
Use examples liberally, and show the expected output if you can. It's helpful to have inline the smallest example of usage that you can demonstrate, while providing links to more sophisticated examples if they are too long to reasonably include in the README.
## Support
Tell people where they can go to for help. It can be any combination of an issue tracker, a chat room, an email address, etc.
## Roadmap
If you have ideas for releases in the future, it is a good idea to list them in the README.
## Contributing
State if you are open to contributions and what your requirements are for accepting them.
For people who want to make changes to your project, it's helpful to have some documentation on how to get started. Perhaps there is a script that they should run or some environment variables that they need to set. Make these steps explicit. These instructions could also be useful to your future self.
You can also document commands to lint the code or run tests. These steps help to ensure high code quality and reduce the likelihood that the changes inadvertently break something. Having instructions for running tests is especially helpful if it requires external setup, such as starting a Selenium server for testing in a browser.
## Authors and acknowledgment
Show your appreciation to those who have contributed to the project.
## License
For open source projects, say how it is licensed.
## Project status
If you have run out of energy or time for your project, put a note at the top of the README saying that development has slowed down or stopped completely. Someone may choose to fork your project or volunteer to step in as a maintainer or owner, allowing your project to keep going. You can also make an explicit request for maintainers.
Python notebook and file for the GAN & cGAN tutorial
\ No newline at end of file
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Please register or to comment