1. Pre-trained Models

1) On Fashion MNIST

• vqvae-fashion_mnist.pth
• Trained VQ-VAE for 47 epochs. (Validation loss: 0.145)

  dataset="fashion_mnist"
  batch_size=128
  lr=0.0002
  n_embeds=128
  hidden_dim=256
  n_pixelcnn_res_blocks=2
  n_pixelcnn_conv_blocks=2

• Then trained PixelCNN for 14 epochs. (Validataion loss: 1.279)

  dataset="fashion_mnist"
  batch_size=128
  lr=0.0002
  n_embeds=128
  hidden_dim=256
  n_pixelcnn_res_blocks=2
  n_pixelcnn_conv_blocks=2

2) On CIFAR-10

• vqvae-cifar10.pth
• Trained VQ-VAE for 40 epochs. (Validation loss: 0.139)

  dataset="cifar10"
  batch_size=128
  lr=0.0003
  n_embeds=128
  hidden_dim=64
  n_pixelcnn_res_blocks=2
  n_pixelcnn_conv_blocks=2

• Then trained PixelCNN for 96 epochs. (Validataion loss: 2.226)

  dataset="cifar10"
  batch_size=128
  lr=0.0003
  n_embeds=128
  hidden_dim=64
  n_pixelcnn_res_blocks=2
  n_pixelcnn_conv_blocks=2

2. Samples

Fashion MNIST

CIFAR-10

3. Implementation Details

1) detach()

• VQ-VAE 학습에서 Loss 계산 시 z_q = z_e + (z_q - z_e).detach()를 추가할 시 학습이 더 빨라지는 것을 확인했으나, 정확히 어떤 기능을 하는지까지는 알지 못했습니다.