AI-For-Beginners/translations/ro/lessons/4-ComputerVision/12-Segmentation/SemanticSegmentationPytorch...

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"# Segmentare\n",
"\n",
"Am învățat deja despre Detectarea Obiectelor, care ne permite să localizăm obiectele dintr-o imagine prin prezicerea *casetelor de delimitare* ale acestora. Totuși, pentru unele sarcini nu avem nevoie doar de casete de delimitare, ci și de o localizare mai precisă a obiectelor. Această sarcină se numește **segmentare**.\n",
"\n",
"Segmentarea poate fi privită ca o **clasificare a pixelilor**, în care pentru **fiecare** pixel al imaginii trebuie să prezicem clasa sa (*fundalul* fiind una dintre clase). Există două algoritmi principali de segmentare:\n",
"\n",
"* **Segmentarea semantică** indică doar clasa pixelului, fără a face distincție între diferite obiecte din aceeași clasă\n",
"* **Segmentarea pe instanțe** împarte clasele în instanțe diferite.\n",
"\n",
"De exemplu, în segmentarea pe instanțe, 10 oi sunt considerate obiecte diferite, în timp ce în segmentarea semantică toate oile sunt reprezentate de o singură clasă.\n",
"\n",
"<img src=\"images/instance_vs_semantic.jpeg\" width=\"50%\">\n",
"\n",
"> Imagine din [acest articol de blog](https://nirmalamurali.medium.com/image-classification-vs-semantic-segmentation-vs-instance-segmentation-625c33a08d50)\n",
"\n",
"Există diferite arhitecturi neuronale pentru segmentare, dar toate au aceeași structură:\n",
"\n",
"* **Encoder** extrage caracteristici din imaginea de intrare\n",
"* **Decoder** transformă aceste caracteristici în **imaginea mască**, având aceeași dimensiune și un număr de canale corespunzător numărului de clase.\n",
"\n",
"<img src=\"images/segm.png\" width=\"80%\">\n",
"\n",
"> Imagine din [această publicație](https://arxiv.org/pdf/2001.05566.pdf)\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Cerințe preliminare\n",
"\n",
"Pentru început, vom importa bibliotecile necesare și vom verifica dacă există GPU disponibil pentru antrenament.\n"
]
},
{
"cell_type": "code",
"execution_count": 1,
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"source": [
"import torch\n",
"import torchvision\n",
"import matplotlib.pyplot as plt\n",
"from torchvision import transforms\n",
"from torch import nn\n",
"from torch import optim\n",
"from tqdm import tqdm\n",
"import numpy as np\n",
"import torch.nn.functional as F\n",
"from skimage.io import imread\n",
"from skimage.transform import resize\n",
"import os\n",
"torch.manual_seed(42)\n",
"np.random.seed(42)"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"execution": {
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"source": [
"device = 'cuda:0' if torch.cuda.is_available() else 'cpu'\n",
"train_size = 0.9\n",
"lr = 1e-3\n",
"weight_decay = 1e-6\n",
"batch_size = 32\n",
"epochs = 30"
]
},
{
"cell_type": "markdown",
"metadata": {
"id": "D4if75qwFMpJ"
},
"source": [
"## Setul de date\n",
"\n",
"Vom folosi imagini dermatoscopice ale nevilor umani. Acest set de date conține 200 de imagini împărțite în trei clase: nev tipic, nev atipic și melanom. Toate imaginile includ și **măști** corespunzătoare care conturează nevul.\n",
"\n",
"Codul de mai jos descarcă setul de date din locația originală și îl decomprimă. Este necesar să aveți utilitarul `unrar` instalat pentru ca acest cod să funcționeze. Puteți instala `unrar` folosind comanda `sudo apt-get install unrar` pe Linux sau descărcând versiunea de linie de comandă pentru Windows [aici](https://www.rarlab.com/rar_add.htm).\n"
]
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"cell_type": "code",
"execution_count": 5,
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"execution": {
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"source": [
"#!apt-get install rar\n",
"!wget https://www.dropbox.com/s/k88qukc20ljnbuo/PH2Dataset.rar\n",
"!unrar x -Y PH2Dataset.rar"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Acum vom defini codul pentru a încărca setul de date. Vom transforma toate imaginile în dimensiunea 256x256 și vom împărți setul de date în părțile de antrenament și testare. Această funcție returnează seturile de date de antrenament și testare, fiecare conținând imagini originale și măști care conturează nevusul.\n"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {
"id": "Rumy9ldAFteW"
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"outputs": [],
"source": [
"def load_dataset(train_part, root='PH2Dataset'):\n",
" images = []\n",
" masks = []\n",
"\n",
" for root, dirs, files in os.walk(os.path.join(root, 'PH2 Dataset images')):\n",
" if root.endswith('_Dermoscopic_Image'):\n",
" images.append(imread(os.path.join(root, files[0])))\n",
" if root.endswith('_lesion'):\n",
" masks.append(imread(os.path.join(root, files[0])))\n",
"\n",
" size = (256, 256)\n",
" images = torch.permute(torch.FloatTensor(np.array([resize(image, size, mode='constant', anti_aliasing=True,) for image in images])), (0, 3, 1, 2))\n",
" masks = torch.FloatTensor(np.array([resize(mask, size, mode='constant', anti_aliasing=False) > 0.5 for mask in masks])).unsqueeze(1)\n",
"\n",
" indices = np.random.permutation(range(len(images)))\n",
" train_part = int(train_part * len(images))\n",
" train_ind = indices[:train_part]\n",
" test_ind = indices[train_part:]\n",
"\n",
" train_dataset = (images[train_ind, :, :, :], masks[train_ind, :, :, :])\n",
" test_dataset = (images[test_ind, :, :, :], masks[test_ind, :, :, :])\n",
"\n",
" return train_dataset, test_dataset\n",
"\n",
"train_dataset, test_dataset = load_dataset(train_size)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Să afișăm acum câteva dintre imaginile din setul de date pentru a vedea cum arată:\n"
]
},
{
"cell_type": "code",
"execution_count": 17,
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"source": [
"def plotn(n, data, only_mask=False):\n",
" images, masks = data[0], data[1]\n",
" fig, ax = plt.subplots(1, n)\n",
" fig1, ax1 = plt.subplots(1, n)\n",
" for i, (img, mask) in enumerate(zip(images, masks)):\n",
" if i == n:\n",
" break\n",
" if not only_mask:\n",
" ax[i].imshow(torch.permute(img, (1, 2, 0)))\n",
" else:\n",
" ax[i].imshow(img[0])\n",
" ax1[i].imshow(mask[0])\n",
" ax[i].axis('off')\n",
" ax1[i].axis('off')\n",
" plt.show()\n",
"\n",
"plotn(5, train_dataset)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Vom avea nevoie și de încărcătoare de date pentru a introduce datele în rețeaua noastră neuronală.\n"
]
},
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"cell_type": "code",
"execution_count": 16,
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"source": [
"train_dataloader = torch.utils.data.DataLoader(list(zip(train_dataset[0], train_dataset[1])), batch_size=batch_size, shuffle=True)\n",
"test_dataloader = torch.utils.data.DataLoader(list(zip(test_dataset[0], test_dataset[1])), batch_size=1, shuffle=False)\n",
"dataloaders = (train_dataloader, test_dataloader)"
]
},
{
"cell_type": "markdown",
"metadata": {
"id": "ORmas8XhYfS8"
},
"source": [
"## SegNet\n",
"\n",
"Cea mai simplă arhitectură encoder-decoder se numește **SegNet**. Aceasta utilizează un CNN standard cu convoluții și pooling-uri în encoder și un CNN deconvoluțional care include convoluții și upsampling-uri în decoder. De asemenea, se bazează pe normalizarea batch-urilor pentru a antrena cu succes o rețea cu mai multe straturi.\n",
"\n",
"<img src=\"images/segnet.png\" width=\"80%\">\n",
"\n",
"> Imagine din această lucrare: Badrinarayanan, V., Kendall, A., & Cipolla, R. (2015). [SegNet: A deep convolutional\n",
"encoder-decoder architecture for image segmentation](https://arxiv.org/pdf/1511.00561.pdf)\n"
]
},
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"execution_count": null,
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"source": [
"class SegNet(nn.Module):\n",
" def __init__(self):\n",
" super().__init__()\n",
" self.enc_conv0 = nn.Conv2d(in_channels=3, out_channels=16, kernel_size=(3,3), padding=1)\n",
" self.act0 = nn.ReLU()\n",
" self.bn0 = nn.BatchNorm2d(16)\n",
" self.pool0 = nn.MaxPool2d(kernel_size=(2,2))\n",
"\n",
" self.enc_conv1 = nn.Conv2d(in_channels=16, out_channels=32, kernel_size=(3,3), padding=1)\n",
" self.act1 = nn.ReLU()\n",
" self.bn1 = nn.BatchNorm2d(32)\n",
" self.pool1 = nn.MaxPool2d(kernel_size=(2,2))\n",
"\n",
" self.enc_conv2 = nn.Conv2d(in_channels=32, out_channels=64, kernel_size=(3,3), padding=1)\n",
" self.act2 = nn.ReLU()\n",
" self.bn2 = nn.BatchNorm2d(64)\n",
" self.pool2 = nn.MaxPool2d(kernel_size=(2,2))\n",
"\n",
" self.enc_conv3 = nn.Conv2d(in_channels=64, out_channels=128, kernel_size=(3,3), padding=1)\n",
" self.act3 = nn.ReLU()\n",
" self.bn3 = nn.BatchNorm2d(128)\n",
" self.pool3 = nn.MaxPool2d(kernel_size=(2,2))\n",
"\n",
" self.bottleneck_conv = nn.Conv2d(in_channels=128, out_channels=256, kernel_size=(3,3), padding=1)\n",
" \n",
" self.upsample0 = nn.UpsamplingBilinear2d(scale_factor=2)\n",
" self.dec_conv0 = nn.Conv2d(in_channels=256, out_channels=128, kernel_size=(3,3), padding=1)\n",
" self.dec_act0 = nn.ReLU()\n",
" self.dec_bn0 = nn.BatchNorm2d(128)\n",
"\n",
" self.upsample1 = nn.UpsamplingBilinear2d(scale_factor=2)\n",
" self.dec_conv1 = nn.Conv2d(in_channels=128, out_channels=64, kernel_size=(3,3), padding=1)\n",
" self.dec_act1 = nn.ReLU()\n",
" self.dec_bn1 = nn.BatchNorm2d(64)\n",
"\n",
" self.upsample2 = nn.UpsamplingBilinear2d(scale_factor=2)\n",
" \n",
" self.dec_conv2 = nn.Conv2d(in_channels=64, out_channels=32, kernel_size=(3,3), padding=1)\n",
" self.dec_act2 = nn.ReLU()\n",
" self.dec_bn2 = nn.BatchNorm2d(32)\n",
"\n",
" self.upsample3 = nn.UpsamplingBilinear2d(scale_factor=2)\n",
" self.dec_conv3 = nn.Conv2d(in_channels=32, out_channels=1, kernel_size=(1,1))\n",
"\n",
" self.sigmoid = nn.Sigmoid()\n",
"\n",
" def forward(self, x):\n",
" e0 = self.pool0(self.bn0(self.act0(self.enc_conv0(x))))\n",
" e1 = self.pool1(self.bn1(self.act1(self.enc_conv1(e0))))\n",
" e2 = self.pool2(self.bn2(self.act2(self.enc_conv2(e1))))\n",
" e3 = self.pool3(self.bn3(self.act3(self.enc_conv3(e2))))\n",
"\n",
" b = self.bottleneck_conv(e3)\n",
"\n",
" d0 = self.dec_bn0(self.dec_act0(self.dec_conv0(self.upsample0(b))))\n",
" d1 = self.dec_bn1(self.dec_act1(self.dec_conv1(self.upsample1(d0))))\n",
" d2 = self.dec_bn2(self.dec_act2(self.dec_conv2(self.upsample2(d1))))\n",
" d3 = self.sigmoid(self.dec_conv3(self.upsample3(d2)))\n",
" return d3"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Ar trebui să menționăm în mod special funcția de pierdere care este utilizată pentru segmentare. În autoencoderele clasice, trebuie să măsurăm similaritatea între două imagini, și putem folosi eroarea medie pătratică pentru a face acest lucru. În segmentare, fiecare pixel din imaginea măștii țintă reprezintă numărul clasei (codificat one-hot pe a treia dimensiune), așa că trebuie să utilizăm funcții de pierdere specifice pentru clasificare - pierderea prin entropie încrucișată, mediată pe toți pixelii. Dacă masca este binară (ca în exemplul nostru) - vom folosi **pierdere prin entropie încrucișată binară** (BCE).\n"
]
},
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"source": [
"model = SegNet().to(device)\n",
"optimizer = optim.Adam(model.parameters(), lr=lr, weight_decay=weight_decay)\n",
"loss_fn = nn.BCEWithLogitsLoss()"
]
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"source": [
"def train(dataloaders, model, loss_fn, optimizer, epochs, device):\n",
" tqdm_iter = tqdm(range(epochs))\n",
" train_dataloader, test_dataloader = dataloaders[0], dataloaders[1]\n",
"\n",
" for epoch in tqdm_iter:\n",
" model.train()\n",
" train_loss = 0.0\n",
" test_loss = 0.0\n",
"\n",
" for batch in train_dataloader:\n",
" imgs, labels = batch\n",
" imgs = imgs.to(device)\n",
" labels = labels.to(device)\n",
"\n",
" preds = model(imgs)\n",
" loss = loss_fn(preds, labels)\n",
"\n",
" optimizer.zero_grad()\n",
" loss.backward()\n",
" optimizer.step()\n",
"\n",
" train_loss += loss.item()\n",
"\n",
" model.eval()\n",
" with torch.no_grad():\n",
" for batch in test_dataloader:\n",
" imgs, labels = batch\n",
" imgs = imgs.to(device)\n",
" labels = labels.to(device)\n",
"\n",
" preds = model(imgs)\n",
" loss = loss_fn(preds, labels)\n",
"\n",
" test_loss += loss.item()\n",
"\n",
" train_loss /= len(train_dataloader)\n",
" test_loss /= len(test_dataloader)\n",
"\n",
" tqdm_dct = {'train loss:': train_loss, 'test loss:': test_loss}\n",
" tqdm_iter.set_postfix(tqdm_dct, refresh=True)\n",
" tqdm_iter.refresh()"
]
},
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"base_uri": "https://localhost:8080/"
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"name": "stderr",
"output_type": "stream",
"text": [
"100%|██████████| 30/30 [16:01<00:00, 32.04s/it, train loss:=0.593, test loss:=0.577]\n"
]
}
],
"source": [
"train(dataloaders, model, loss_fn, optimizer, epochs, device)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Pentru a evalua modelul nostru, vom plota doar măștile țintă și măștile prezise pentru un număr de imagini:\n"
]
},
{
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"height": 203
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{
"data": {
"image/png": 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",
"text/plain": [
"<Figure size 432x288 with 5 Axes>"
]
},
"metadata": {
"needs_background": "light"
},
"output_type": "display_data"
},
{
"data": {
"image/png": "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",
"text/plain": [
"<Figure size 432x288 with 5 Axes>"
]
},
"metadata": {
"needs_background": "light"
},
"output_type": "display_data"
}
],
"source": [
"model.eval()\n",
"predictions = []\n",
"image_mask = []\n",
"plots = 5\n",
"images, masks = test_dataset[0], test_dataset[1]\n",
"for i, (img, mask) in enumerate(zip(images, masks)):\n",
" if i == plots:\n",
" break\n",
" img = img.to(device).unsqueeze(0)\n",
" predictions.append((model(img).detach().cpu()[0] > 0.5).float())\n",
" image_mask.append(mask)\n",
"plotn(plots, (predictions, image_mask), only_mask=True)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Există, de asemenea, câțiva indicatori formali pentru a evalua performanța, despre care puteți citi [aici](https://towardsdatascience.com/metrics-to-evaluate-your-semantic-segmentation-model-6bcb99639aa2). Cel mai ușor de înțeles este **acuratețea pixelilor** - un procent de pixeli clasificați corect.\n"
]
},
{
"cell_type": "markdown",
"metadata": {
"id": "RU5KGWXaTbso"
},
"source": [
"## U-Net\n",
"\n",
"Arhitectura SegNet este foarte intuitivă, dar nu este cea mai precisă. De fapt, aplicăm mai întâi o arhitectură CNN piramidală pe imaginea originală, ceea ce reduce acuratețea spațială a caracteristicilor imaginii. Apoi, când reconstruim imaginea, nu putem reconstrui corect pozițiile pixelilor.\n",
"\n",
"Aceasta ne conduce la ideea de **conexiuni de tip skip** între straturile de convoluție din encoder și decoder. Această arhitectură este foarte comună pentru segmentarea semantică și este numită **U-Net**. Conexiunile de tip skip la fiecare nivel de convoluție ajută rețeaua să nu piardă informații despre caracteristicile din intrarea originală la acel nivel.\n",
"\n",
"Vom folosi aici o arhitectură CNN destul de simplă, dar U-Net poate utiliza și un encoder mai complex pentru extragerea caracteristicilor, cum ar fi ResNet-50.\n",
"\n",
"<img src=\"images/unet.png\" width=\"70%\">\n",
"\n",
"> Imagine din lucrarea: Ronneberger, Olaf, Philipp Fischer, și Thomas Brox. [U-Net: Convolutional networks for biomedical image segmentation.](https://arxiv.org/pdf/1505.04597.pdf)\n"
]
},
{
"cell_type": "code",
"execution_count": 14,
"metadata": {
"execution": {
"iopub.execute_input": "2022-04-08T16:17:45.665392Z",
"iopub.status.busy": "2022-04-08T16:17:45.665102Z",
"iopub.status.idle": "2022-04-08T16:17:45.691051Z",
"shell.execute_reply": "2022-04-08T16:17:45.690314Z",
"shell.execute_reply.started": "2022-04-08T16:17:45.665341Z"
},
"id": "ZLKGrI4YTbs9",
"trusted": true
},
"outputs": [],
"source": [
"class UNet(nn.Module):\n",
" def __init__(self):\n",
" super().__init__()\n",
" self.enc_conv0 = nn.Conv2d(in_channels=3, out_channels=16, kernel_size=(3,3), padding=1)\n",
" self.act0 = nn.ReLU()\n",
" self.bn0 = nn.BatchNorm2d(16)\n",
" self.pool0 = nn.MaxPool2d(kernel_size=(2,2))\n",
"\n",
" self.enc_conv1 = nn.Conv2d(in_channels=16, out_channels=32, kernel_size=(3,3), padding=1)\n",
" self.act1 = nn.ReLU()\n",
" self.bn1 = nn.BatchNorm2d(32)\n",
" self.pool1 = nn.MaxPool2d(kernel_size=(2,2))\n",
"\n",
" self.enc_conv2 = nn.Conv2d(in_channels=32, out_channels=64, kernel_size=(3,3), padding=1)\n",
" self.act2 = nn.ReLU()\n",
" self.bn2 = nn.BatchNorm2d(64)\n",
" self.pool2 = nn.MaxPool2d(kernel_size=(2,2))\n",
"\n",
" self.enc_conv3 = nn.Conv2d(in_channels=64, out_channels=128, kernel_size=(3,3), padding=1)\n",
" self.act3 = nn.ReLU()\n",
" self.bn3 = nn.BatchNorm2d(128)\n",
" self.pool3 = nn.MaxPool2d(kernel_size=(2,2))\n",
"\n",
" self.bottleneck_conv = nn.Conv2d(in_channels=128, out_channels=256, kernel_size=(3,3), padding=1)\n",
" \n",
" self.upsample0 = nn.UpsamplingBilinear2d(scale_factor=2)\n",
" self.dec_conv0 = nn.Conv2d(in_channels=384, out_channels=128, kernel_size=(3,3), padding=1)\n",
" self.dec_act0 = nn.ReLU()\n",
" self.dec_bn0 = nn.BatchNorm2d(128)\n",
"\n",
" self.upsample1 = nn.UpsamplingBilinear2d(scale_factor=2)\n",
" self.dec_conv1 = nn.Conv2d(in_channels=192, out_channels=64, kernel_size=(3,3), padding=1)\n",
" self.dec_act1 = nn.ReLU()\n",
" self.dec_bn1 = nn.BatchNorm2d(64)\n",
"\n",
" self.upsample2 = nn.UpsamplingBilinear2d(scale_factor=2)\n",
" self.dec_conv2 = nn.Conv2d(in_channels=96, out_channels=32, kernel_size=(3,3), padding=1)\n",
" self.dec_act2 = nn.ReLU()\n",
" self.dec_bn2 = nn.BatchNorm2d(32)\n",
"\n",
" self.upsample3 = nn.UpsamplingBilinear2d(scale_factor=2)\n",
" self.dec_conv3 = nn.Conv2d(in_channels=48, out_channels=1, kernel_size=(1,1))\n",
"\n",
" self.sigmoid = nn.Sigmoid()\n",
"\n",
" def forward(self, x):\n",
" e0 = self.pool0(self.bn0(self.act0(self.enc_conv0(x))))\n",
" e1 = self.pool1(self.bn1(self.act1(self.enc_conv1(e0))))\n",
" e2 = self.pool2(self.bn2(self.act2(self.enc_conv2(e1))))\n",
" e3 = self.pool3(self.bn3(self.act3(self.enc_conv3(e2))))\n",
"\n",
" cat0 = self.bn0(self.act0(self.enc_conv0(x)))\n",
" cat1 = self.bn1(self.act1(self.enc_conv1(e0)))\n",
" cat2 = self.bn2(self.act2(self.enc_conv2(e1)))\n",
" cat3 = self.bn3(self.act3(self.enc_conv3(e2)))\n",
"\n",
" b = self.bottleneck_conv(e3)\n",
"\n",
" d0 = self.dec_bn0(self.dec_act0(self.dec_conv0(torch.cat((self.upsample0(b), cat3), dim=1))))\n",
" d1 = self.dec_bn1(self.dec_act1(self.dec_conv1(torch.cat((self.upsample1(d0), cat2), dim=1))))\n",
" d2 = self.dec_bn2(self.dec_act2(self.dec_conv2(torch.cat((self.upsample2(d1), cat1), dim=1))))\n",
" d3 = self.sigmoid(self.dec_conv3(torch.cat((self.upsample3(d2), cat0), dim=1)))\n",
" return d3"
]
},
{
"cell_type": "code",
"execution_count": 15,
"metadata": {
"execution": {
"iopub.execute_input": "2022-04-08T16:17:45.692880Z",
"iopub.status.busy": "2022-04-08T16:17:45.692240Z",
"iopub.status.idle": "2022-04-08T16:17:45.719635Z",
"shell.execute_reply": "2022-04-08T16:17:45.719023Z",
"shell.execute_reply.started": "2022-04-08T16:17:45.692842Z"
},
"id": "15GA_43BTbtI",
"trusted": true
},
"outputs": [],
"source": [
"model = UNet().to(device)\n",
"optimizer = optim.Adam(model.parameters(), lr=lr, weight_decay=weight_decay)\n",
"loss_fn = nn.BCEWithLogitsLoss()"
]
},
{
"cell_type": "code",
"execution_count": 16,
"metadata": {
"colab": {
"base_uri": "https://localhost:8080/"
},
"execution": {
"iopub.execute_input": "2022-04-08T16:17:45.721443Z",
"iopub.status.busy": "2022-04-08T16:17:45.721062Z",
"iopub.status.idle": "2022-04-08T16:20:23.193420Z",
"shell.execute_reply": "2022-04-08T16:20:23.191453Z",
"shell.execute_reply.started": "2022-04-08T16:17:45.721410Z"
},
"id": "_dgiuvVVFMpr",
"outputId": "438c570f-9480-48c6-bce6-14fbdf5b2d5f",
"trusted": true
},
"outputs": [
{
"name": "stderr",
"output_type": "stream",
"text": [
"100%|██████████| 30/30 [29:07<00:00, 58.26s/it, train loss:=0.595, test loss:=0.572] \n"
]
}
],
"source": [
"train(dataloaders, model, loss_fn, optimizer, epochs, device)"
]
},
{
"cell_type": "code",
"execution_count": 17,
"metadata": {
"colab": {
"base_uri": "https://localhost:8080/",
"height": 203
},
"id": "iEu5wjuMFMps",
"outputId": "cf76869c-cf86-493f-fa73-a8790d21bf20"
},
"outputs": [
{
"data": {
"image/png": "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",
"text/plain": [
"<Figure size 432x288 with 5 Axes>"
]
},
"metadata": {
"needs_background": "light"
},
"output_type": "display_data"
},
{
"data": {
"image/png": 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",
"text/plain": [
"<Figure size 432x288 with 5 Axes>"
]
},
"metadata": {
"needs_background": "light"
},
"output_type": "display_data"
}
],
"source": [
"model.eval()\n",
"predictions = []\n",
"image_mask = []\n",
"plots = 5\n",
"images, masks = test_dataset[0], test_dataset[1]\n",
"for i, (img, mask) in enumerate(zip(images, masks)):\n",
" if i == plots:\n",
" break\n",
" img = img.to(device).unsqueeze(0)\n",
" predictions.append((model(img).detach().cpu()[0] > 0.5).float())\n",
" image_mask.append(mask)\n",
"plotn(plots, (predictions, image_mask), only_mask=True)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"\n---\n\n**Declinare de responsabilitate**: \nAcest document a fost tradus folosind serviciul de traducere AI [Co-op Translator](https://github.com/Azure/co-op-translator). Deși ne străduim să asigurăm acuratețea, vă rugăm să fiți conștienți că traducerile automate pot conține erori sau inexactități. Documentul original în limba sa natală ar trebui considerat sursa autoritară. Pentru informații critice, se recomandă traducerea profesională realizată de un specialist uman. Nu ne asumăm responsabilitatea pentru eventualele neînțelegeri sau interpretări greșite care pot apărea din utilizarea acestei traduceri.\n"
]
}
],
"metadata": {
"accelerator": "GPU",
"colab": {
"collapsed_sections": [],
"name": "SemanticSegmentation.ipynb",
"provenance": []
},
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.8.12"
},
"coopTranslator": {
"original_hash": "c0381c913f8945105ea15a54e55faaa9",
"translation_date": "2025-08-29T23:44:10+00:00",
"source_file": "lessons/4-ComputerVision/12-Segmentation/SemanticSegmentationPytorch.ipynb",
"language_code": "ro"
}
},
"nbformat": 4,
"nbformat_minor": 0
}