aljaz/DALLE2-pytorch
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fix cosine bbeta schedule, thanks to @Zhengxinyang

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Phil Wang
2022-04-19 20:54:28 -07:00
parent c26b77ad20
commit ddde8ca1bf
2 changed files with 3 additions and 3 deletions
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4
dalle2_pytorch/dalle2_pytorch.py
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@@ -105,8 +105,8 @@ def cosine_beta_schedule(timesteps, s = 0.008):
as proposed in https://openreview.net/forum?id=-NEXDKk8gZ as proposed in https://openreview.net/forum?id=-NEXDKk8gZ
""" """
steps = timesteps + 1 steps = timesteps + 1
x = torch.linspace(0, steps, steps) x = torch.linspace(0, timesteps, steps)
alphas_cumprod = torch.cos(((x / steps) + s) / (1 + s) * torch.pi * 0.5) ** 2 alphas_cumprod = torch.cos(((x / timesteps) + s) / (1 + s) * torch.pi * 0.5) ** 2
alphas_cumprod = alphas_cumprod / alphas_cumprod[0] alphas_cumprod = alphas_cumprod / alphas_cumprod[0]
betas = 1 - (alphas_cumprod[1:] / alphas_cumprod[:-1]) betas = 1 - (alphas_cumprod[1:] / alphas_cumprod[:-1])
return torch.clip(betas, 0, 0.999) return torch.clip(betas, 0, 0.999)

2
setup.py
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@@ -10,7 +10,7 @@ setup(
'dream = dalle2_pytorch.cli:dream' 'dream = dalle2_pytorch.cli:dream'
], ],
}, },
version = '0.0.25', version = '0.0.26',
license='MIT', license='MIT',
description = 'DALL-E 2', description = 'DALL-E 2',
author = 'Phil Wang', author = 'Phil Wang',