Mirrored_Repos/InvokeAI
1
0
Fork 0
mirror of https://github.com/invoke-ai/InvokeAI synced 2024-08-30 20:32:17 +00:00
Code Issues Packages Projects Releases Wiki Activity

Suggested changes

Browse Source 
Co-Authored-By: Ryan Dick <14897797+RyanJDick@users.noreply.github.com>
This commit is contained in:
Sergey Borisov 2024-07-22 23:09:11 +03:00
parent 1748848b7b
commit 5f0fe3c8a9
3 changed files with 14 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
invokeai/backend/stable_diffusion/diffusion_backend.py
View File

@ -100,8 +100,8 @@ class StableDiffusionBackend:
if isinstance(guidance_scale, list):
guidance_scale = guidance_scale[ctx.step_index]
# Note: Although logically it same, it seams that precision errors differs.
# This sometimes results in slightly different output.
# Note: Although this `torch.lerp(...)` line is logically equivalent to the current CFG line, it seems to result
# in slightly different outputs. It is suspected that this is caused by small precision differences.
# return torch.lerp(ctx.negative_noise_pred, ctx.positive_noise_pred, guidance_scale)
return ctx.negative_noise_pred + guidance_scale * (ctx.positive_noise_pred - ctx.negative_noise_pred)

4
invokeai/backend/stable_diffusion/extensions/base.py
View File

@ -2,7 +2,7 @@ from __future__ import annotations
from contextlib import contextmanager
from dataclasses import dataclass
from typing import TYPE_CHECKING, Callable, Dict, List
from typing import TYPE_CHECKING, Callable, Dict, List, Optional
import torch
from diffusers import UNet2DConditionModel
@ -56,5 +56,5 @@ class ExtensionBase:
yield None
@contextmanager
def patch_unet(self, state_dict: Dict[str, torch.Tensor], unet: UNet2DConditionModel):
def patch_unet(self, unet: UNet2DConditionModel, cached_weights: Optional[Dict[str, torch.Tensor]] = None):
yield None

27
invokeai/backend/stable_diffusion/extensions/freeu.py
View File

@ -15,28 +15,21 @@ if TYPE_CHECKING:
class FreeUExt(ExtensionBase):
def __init__(
self,
freeu_config: Optional[FreeUConfig],
freeu_config: FreeUConfig,
):
super().__init__()
self.freeu_config = freeu_config
self._freeu_config = freeu_config
@contextmanager
def patch_unet(self, unet: UNet2DConditionModel, cached_weights: Optional[Dict[str, torch.Tensor]] = None):
did_apply_freeu = False
unet.enable_freeu(
b1=self._freeu_config.b1,
b2=self._freeu_config.b2,
s1=self._freeu_config.s1,
s2=self._freeu_config.s2,
)
try:
assert hasattr(unet, "enable_freeu") # mypy doesn't pick up this attribute?
if self.freeu_config is not None:
unet.enable_freeu(
b1=self.freeu_config.b1,
b2=self.freeu_config.b2,
s1=self.freeu_config.s1,
s2=self.freeu_config.s2,
)
did_apply_freeu = True
yield
finally:
assert hasattr(unet, "disable_freeu") # mypy doesn't pick up this attribute?
if did_apply_freeu:
unet.disable_freeu()
unet.disable_freeu()