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Duplicate from stabilityai/sdxl-vae

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Co-authored-by: Apolinário from multimodal AI art <multimodalart@users.noreply.huggingface.co>

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README.md ADDED
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+ ---
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+ license: mit
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+ tags:
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+ - stable-diffusion
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+ - stable-diffusion-diffusers
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+ inference: false
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+ ---
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+ # SDXL - VAE
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+
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+ #### How to use with 🧨 diffusers
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+ You can integrate this fine-tuned VAE decoder to your existing `diffusers` workflows, by including a `vae` argument to the `StableDiffusionPipeline`
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+ ```py
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+ from diffusers.models import AutoencoderKL
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+ from diffusers import StableDiffusionPipeline
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+
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+ model = "stabilityai/your-stable-diffusion-model"
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+ vae = AutoencoderKL.from_pretrained("stabilityai/sdxl-vae")
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+ pipe = StableDiffusionPipeline.from_pretrained(model, vae=vae)
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+ ```
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+
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+ ## Model
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+ [SDXL](https://huggingface.co/stabilityai/stable-diffusion-xl-base-0.9) is a [latent diffusion model](https://arxiv.org/abs/2112.10752), where the diffusion operates in a pretrained,
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+ learned (and fixed) latent space of an autoencoder.
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+ While the bulk of the semantic composition is done by the latent diffusion model,
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+ we can improve _local_, high-frequency details in generated images by improving the quality of the autoencoder.
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+ To this end, we train the same autoencoder architecture used for the original [Stable Diffusion](https://github.com/CompVis/stable-diffusion) at a larger batch-size (256 vs 9)
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+ and additionally track the weights with an exponential moving average (EMA).
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+ The resulting autoencoder outperforms the original model in all evaluated reconstruction metrics, see the table below.
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+
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+
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+ ## Evaluation
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+ _SDXL-VAE vs original kl-f8 VAE vs f8-ft-MSE_
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+ ### COCO 2017 (256x256, val, 5000 images)
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+ | Model | rFID | PSNR | SSIM | PSIM | Link | Comments
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+ |----------|------|--------------|---------------|---------------|------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------|
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+ | | | | | | | |
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+ | SDXL-VAE | 4.42 | 24.7 +/- 3.9 | 0.73 +/- 0.13 | 0.88 +/- 0.27 | https://huggingface.co/stabilityai/sdxl-vae/blob/main/sdxl_vae.safetensors | as used in SDXL |
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+ | original | 4.99 | 23.4 +/- 3.8 | 0.69 +/- 0.14 | 1.01 +/- 0.28 | https://ommer-lab.com/files/latent-diffusion/kl-f8.zip | as used in SD |
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+ | ft-MSE | 4.70 | 24.5 +/- 3.7 | 0.71 +/- 0.13 | 0.92 +/- 0.27 | https://huggingface.co/stabilityai/sd-vae-ft-mse-original/resolve/main/vae-ft-mse-840000-ema-pruned.ckpt | resumed with EMA from ft-EMA, emphasis on MSE (rec. loss = MSE + 0.1 * LPIPS), smoother outputs |
config.json ADDED
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+ "_class_name": "AutoencoderKL",
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+ "act_fn": "silu",
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+ "in_channels": 3,
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+ "layers_per_block": 2,
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+ "norm_num_groups": 32,
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+ "out_channels": 3,
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+ "sample_size": 1024,
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+ "scaling_factor": 0.13025,
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+ "up_block_types": [
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+ "UpDecoderBlock2D",
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+ "UpDecoderBlock2D",
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+ "UpDecoderBlock2D"
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+ ]
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+ }
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