{"id":4396,"date":"2024-03-14T12:59:57","date_gmt":"2024-03-14T03:59:57","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/pytorch%e3%81%a7%e3%83%a2%e3%83%87%e3%83%ab%e3%81%ae%e6%95%99%e5%b8%ab%e3%81%aa%e3%81%97%e5%ad%a6%e7%bf%92%e3%82%92%e8%a1%8c%e3%81%86%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b\/"},"modified":"2025-08-02T20:57:47","modified_gmt":"2025-08-02T11:57:47","slug":"pytorch%e3%81%a7%e3%83%a2%e3%83%87%e3%83%ab%e3%81%ae%e6%95%99%e5%b8%ab%e3%81%aa%e3%81%97%e5%ad%a6%e7%bf%92%e3%82%92%e8%a1%8c%e3%81%86%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/pytorch%e3%81%a7%e3%83%a2%e3%83%87%e3%83%ab%e3%81%ae%e6%95%99%e5%b8%ab%e3%81%aa%e3%81%97%e5%ad%a6%e7%bf%92%e3%82%92%e8%a1%8c%e3%81%86%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b\/","title":{"rendered":"PyTorch\u3067\u30e2\u30c7\u30eb\u306e\u6559\u5e2b\u306a\u3057\u5b66\u7fd2\u3092\u884c\u3046\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>PyTorch\u3092\u4f7f\u7528\u3057\u3066\u30e2\u30c7\u30eb\u306e\u6559\u5e2b\u306a\u3057\u5b66\u7fd2\u3092\u884c\u3046\u5834\u5408\u3001\u901a\u5e38\u306f\u30aa\u30fc\u30c8\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3084\u751f\u6210\u5bfe\u6297\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08GAN\uff09\u306a\u3069\u306e\u30e2\u30c7\u30eb\u3092\u8a13\u7df4\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001PyTorch\u3092\u4f7f\u7528\u3057\u3066\u7c21\u5358\u306a\u30aa\u30fc\u30c8\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3092\u8a13\u7df4\u3059\u308b\u65b9\u6cd5\u306e\u7c21\u5358\u306a\u4f8b\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> torch\r\n<span class=\"hljs-keyword\">import<\/span> torch.nn <span class=\"hljs-keyword\">as<\/span> nn\r\n<span class=\"hljs-keyword\">import<\/span> torch.optim <span class=\"hljs-keyword\">as<\/span> optim\r\n<span class=\"hljs-keyword\">from<\/span> torch.utils.data <span class=\"hljs-keyword\">import<\/span> DataLoader\r\n<span class=\"hljs-keyword\">from<\/span> torchvision <span class=\"hljs-keyword\">import<\/span> datasets, transforms\r\n\r\n<span class=\"hljs-comment\"># \u5b9a\u4e49\u4e00\u4e2a\u7b80\u5355\u7684\u81ea\u7f16\u7801\u5668\u6a21\u578b<\/span>\r\n<span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Autoencoder<\/span>(nn.Module):\r\n    <span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title function_\">__init__<\/span>(<span class=\"hljs-params\">self<\/span>):\r\n        <span class=\"hljs-built_in\">super<\/span>(Autoencoder, self).__init__()\r\n        self.encoder = nn.Sequential(\r\n            nn.Linear(<span class=\"hljs-number\">784<\/span>, <span class=\"hljs-number\">128<\/span>),\r\n            nn.ReLU(),\r\n            nn.Linear(<span class=\"hljs-number\">128<\/span>, <span class=\"hljs-number\">64<\/span>),\r\n            nn.ReLU()\r\n        )\r\n        \r\n        self.decoder = nn.Sequential(\r\n            nn.Linear(<span class=\"hljs-number\">64<\/span>, <span class=\"hljs-number\">128<\/span>),\r\n            nn.ReLU(),\r\n            nn.Linear(<span class=\"hljs-number\">128<\/span>, <span class=\"hljs-number\">784<\/span>),\r\n            nn.Sigmoid()\r\n        )\r\n    \r\n    <span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title function_\">forward<\/span>(<span class=\"hljs-params\">self, x<\/span>):\r\n        x = self.encoder(x)\r\n        x = self.decoder(x)\r\n        <span class=\"hljs-keyword\">return<\/span> x\r\n\r\n<span class=\"hljs-comment\"># \u52a0\u8f7dMNIST\u6570\u636e\u96c6<\/span>\r\ntransform = transforms.Compose([transforms.ToTensor()])\r\ntrain_dataset = datasets.MNIST(root=<span class=\"hljs-string\">'.\/data'<\/span>, train=<span class=\"hljs-literal\">True<\/span>, transform=transform, download=<span class=\"hljs-literal\">True<\/span>)\r\ntrain_loader = DataLoader(train_dataset, batch_size=<span class=\"hljs-number\">64<\/span>, shuffle=<span class=\"hljs-literal\">True<\/span>)\r\n\r\n<span class=\"hljs-comment\"># \u521d\u59cb\u5316\u6a21\u578b\u548c\u4f18\u5316\u5668<\/span>\r\nmodel = Autoencoder()\r\ncriterion = nn.MSELoss()\r\noptimizer = optim.Adam(model.parameters(), lr=<span class=\"hljs-number\">0.001<\/span>)\r\n\r\n<span class=\"hljs-comment\"># \u8bad\u7ec3\u6a21\u578b<\/span>\r\nnum_epochs = <span class=\"hljs-number\">10<\/span>\r\n<span class=\"hljs-keyword\">for<\/span> epoch <span class=\"hljs-keyword\">in<\/span> <span class=\"hljs-built_in\">range<\/span>(num_epochs):\r\n    <span class=\"hljs-keyword\">for<\/span> data <span class=\"hljs-keyword\">in<\/span> train_loader:\r\n        img, _ = data\r\n        img = img.view(img.size(<span class=\"hljs-number\">0<\/span>), -<span class=\"hljs-number\">1<\/span>)\r\n        \r\n        optimizer.zero_grad()\r\n        recon = model(img)\r\n        loss = criterion(recon, img)\r\n        loss.backward()\r\n        optimizer.step()\r\n    \r\n    <span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-string\">f'Epoch [<span class=\"hljs-subst\">{epoch+<span class=\"hljs-number\">1<\/span>}<\/span>\/<span class=\"hljs-subst\">{num_epochs}<\/span>], Loss: <span class=\"hljs-subst\">{loss.item()}<\/span>'<\/span>)\r\n\r\n<span class=\"hljs-comment\"># \u4f7f\u7528\u8bad\u7ec3\u597d\u7684\u6a21\u578b\u91cd\u5efa\u8f93\u5165\u56fe\u50cf<\/span>\r\ntest_img, _ = <span class=\"hljs-built_in\">next<\/span>(<span class=\"hljs-built_in\">iter<\/span>(train_loader))\r\ntest_img = test_img.view(test_img.size(<span class=\"hljs-number\">0<\/span>), -<span class=\"hljs-number\">1<\/span>)\r\noutput_img = model(test_img)\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001\u307e\u305a\u30b7\u30f3\u30d7\u30eb\u306a\u30aa\u30fc\u30c8\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3057\u3001\u6b21\u306bMNIST\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u8aad\u307f\u8fbc\u307f\u3001\u30e2\u30c7\u30eb\u3068\u30aa\u30d7\u30c6\u30a3\u30de\u30a4\u30b6\u3092\u521d\u671f\u5316\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3001\u30e2\u30c7\u30eb\u3092\u8a13\u7df4\u3057\u3001\u5404\u30a8\u30dd\u30c3\u30af\u3054\u3068\u306e\u640d\u5931\u5024\u3092\u51fa\u529b\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u8a13\u7df4\u6e08\u307f\u306e\u30e2\u30c7\u30eb\u3092\u4f7f\u7528\u3057\u3066\u5165\u529b\u753b\u50cf\u3092\u518d\u69cb\u7bc9\u3057\u307e\u3059\u3002\u30e2\u30c7\u30eb\u69cb\u9020\u3068\u30cf\u30a4\u30d1\u30fc\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u81ea\u5206\u306e\u30cb\u30fc\u30ba\u3084\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u826f\u3044\u6559\u5e2b\u306a\u3057\u5b66\u7fd2\u306e\u52b9\u679c\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PyTorch\u3092\u4f7f\u7528\u3057\u3066\u30e2\u30c7\u30eb\u306e\u6559\u5e2b\u306a\u3057\u5b66\u7fd2\u3092\u884c\u3046\u5834\u5408\u3001\u901a\u5e38\u306f\u30aa\u30fc\u30c8\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3084\u751f\u6210\u5bfe\u6297\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08GAN\uff09\u306a\u3069\u306e\u30e2\u30c7\u30eb\u3092\u8a13\u7df4\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001PyTorch\u3092\u4f7f\u7528\u3057\u3066\u7c21\u5358\u306a\u30aa\u30fc\u30c8\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3092\u8a13\u7df4\u3059\u308b\u65b9\u6cd5 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-4396","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PyTorch\u3067\u30e2\u30c7\u30eb\u306e\u6559\u5e2b\u306a\u3057\u5b66\u7fd2\u3092\u884c\u3046\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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