wehub-resource-sync
23 lines
858 B
Python
23 lines
858 B
Python
import torch
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from einops import rearrange
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from torch import Tensor, nn
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class QwenAutoencoder(nn.Module):
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"""qwen-ae-f8-16c: the Qwen-Image VAE (f8, 16 latent channels)."""
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def __init__(self):
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super().__init__()
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from diffusers import AutoencoderKLQwenImage
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self.ae = AutoencoderKLQwenImage.from_pretrained("Qwen/Qwen-Image", subfolder="vae")
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self.compression = 8
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self.channels = 16
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self.register_buffer("latents_mean", torch.tensor(self.ae.latents_mean).view(1, -1, 1, 1, 1))
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self.register_buffer("latents_std", torch.tensor(self.ae.latents_std).view(1, -1, 1, 1, 1))
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def decode(self, x: Tensor) -> Tensor:
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x = rearrange(x, "b c h w -> b c 1 h w")
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x = (x * self.latents_std) + self.latents_mean
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return rearrange(self.ae.decode(x).sample, "b c 1 h w -> b c h w")
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