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Comments (2)

MasaTate avatar MasaTate commented on September 7, 2024

要件

入力:

  • sourceテンソル、torch.Tensor([B, C, H, W])、C = 3
  • backgroundテンソル、torch.Tensor([B, C, H, W])、C = 3
  • alphaテンソル、torch.Tensor([B, C, H/c, W/c])、C = 1
  • foreground residualテンソル、torch.Tensor([B, C, H/c, W/c])、C = 3
  • error mapテンソル、torch.Tensor([B, C, H/c, W/c])、C = 1
  • hiddenテンソル、torch.Tensor([B, C, H/c, W/c])、C = 32

出力:

  • alphaテンソル、torch.Tensor([B, C, H, W])、C = 1
  • foreground residualテンソル、torch.Tensor([B, C, H, W])、C = 3
  • (reference mapテンソル、torch.Tensor([B, 1, H, W])、C=1

from 2022-backgroundmatting.

MasaTate avatar MasaTate commented on September 7, 2024

手順:

  1. alpha_c, F^R_c, H_c, I, B、のサイズを(H/2, W/2)に変換し、結合。
  2. E_4を参考に、8×8のパッチをクロップ
  3. それぞれのパッチを3×3のconvolutionに通す。paddingなし。
  4. Batch Normalization と ReLUをする。
  5. 2,3を2回やる。
  6. 8×8に再度変換し、IとBからとってきたoriginal resolutionの8×8パッチを結合。
  7. さらに2層の3×3 convolution、Batch Normalization、ReLUに通す。すると4×4のalpha matteとforeground residualsの結果が出てくる。
  8. alpha_cとF^R_cをoriginal resolutionに戻して4×4のパッチをswapする。

from 2022-backgroundmatting.

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