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fix broken image generation on plms and ddim samplers

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This commit is contained in:
Lincoln Stein 2022-10-07 08:26:53 -04:00
parent c1230da3ab
commit 333219be35
1 changed files with 5 additions and 4 deletions
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9
ldm/models/diffusion/sampler.py
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@ -39,6 +39,7 @@ class Sampler(object):
ddim_eta=0.0,
verbose=False,
):
self.total_steps = ddim_num_steps
self.ddim_timesteps = make_ddim_timesteps(
ddim_discr_method=ddim_discretize,
num_ddim_timesteps=ddim_num_steps,
@ -211,6 +212,7 @@ class Sampler(object):
if ddim_use_original_steps
else np.flip(timesteps)
)
total_steps=steps
iterator = tqdm(
@ -305,7 +307,7 @@ class Sampler(object):
time_range = np.flip(timesteps)
total_steps = timesteps.shape[0]
print(f'>> Running {self.__class__.__name__} Sampling with {total_steps} timesteps')
print(f'>> Running {self.__class__.__name__} sampling starting at step {self.total_steps - t_start} of {self.total_steps} ({total_steps} new sampling steps)')
iterator = tqdm(time_range, desc='Decoding image', total=total_steps)
x_dec = x_latent
@ -351,11 +353,10 @@ class Sampler(object):
return x_dec
def get_initial_image(self,x_T,shape,timesteps=None):
x = torch.randn(shape, device=self.device)
if x_T is None:
return x
return torch.randn(shape, device=self.device)
else:
return x_T + x
return x_T
def p_sample(
self,