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Convert RGB to BGR for the SDXL watermark encoder #7013

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Merged
merged 3 commits into from
Apr 26, 2024
Merged

Convert RGB to BGR for the SDXL watermark encoder #7013

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7d28372
Convert channel order to BGR for the watermark encoder. Convert the w…
btlorch Feb 18, 2024
f811786
Revert channel order before stacking images to overcome limitations t…
btlorch Feb 27, 2024
b0e9491
Merge branch 'main' into main
sayakpaul Mar 24, 2024
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8 changes: 7 additions & 1 deletion src/diffusers/pipelines/stable_diffusion_xl/watermark.py
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Expand Up @@ -28,9 +28,15 @@ def apply_watermark(self, images: torch.FloatTensor):

images = (255 * (images / 2 + 0.5)).cpu().permute(0, 2, 3, 1).float().numpy()

# Convert RGB to BGR, which is the channel order expected by the watermark encoder.
images = images[:, :, :, ::-1]

images = [self.encoder.encode(image, "dwtDct") for image in images]

images = torch.from_numpy(np.array(images)).permute(0, 3, 1, 2)
# Convert BGR back to RGB
images = np.array(images)[:, :, :, ::-1]

images = torch.from_numpy(images).permute(0, 3, 1, 2)

images = torch.clamp(2 * (images / 255 - 0.5), min=-1.0, max=1.0)
return images