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chenpangpang
diffusers
Commits
b296f2d4
Commit
b296f2d4
authored
Jun 24, 2022
by
Patrick von Platen
Browse files
Merge branch 'main' of
https://github.com/huggingface/diffusers
into main
parents
ac796924
3618d330
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src/diffusers/schedulers/scheduling_ddpm.py
src/diffusers/schedulers/scheduling_ddpm.py
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src/diffusers/schedulers/scheduling_ddpm.py
View file @
b296f2d4
...
@@ -92,9 +92,9 @@ class DDPMScheduler(SchedulerMixin, ConfigMixin):
...
@@ -92,9 +92,9 @@ class DDPMScheduler(SchedulerMixin, ConfigMixin):
alpha_prod_t
=
self
.
alphas_cumprod
[
t
]
alpha_prod_t
=
self
.
alphas_cumprod
[
t
]
alpha_prod_t_prev
=
self
.
alphas_cumprod
[
t
-
1
]
if
t
>
0
else
self
.
one
alpha_prod_t_prev
=
self
.
alphas_cumprod
[
t
-
1
]
if
t
>
0
else
self
.
one
# For t > 0, compute predicted variance βt (see form
a
la (6) and (7) from https://arxiv.org/pdf/2006.11239.pdf)
# For t > 0, compute predicted variance βt (see form
u
la (6) and (7) from https://arxiv.org/pdf/2006.11239.pdf)
# and sample from it to get previous sample
# and sample from it to get previous sample
# x_{t-1} ~ N(pred_prev_sample, variance) == add variane to pred_sample
# x_{t-1} ~ N(pred_prev_sample, variance) == add varian
c
e to pred_sample
variance
=
(
1
-
alpha_prod_t_prev
)
/
(
1
-
alpha_prod_t
)
*
self
.
betas
[
t
]
variance
=
(
1
-
alpha_prod_t_prev
)
/
(
1
-
alpha_prod_t
)
*
self
.
betas
[
t
]
if
variance_type
is
None
:
if
variance_type
is
None
:
...
...
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