IOPaint/lama_cleaner/model/instruct_pix2pix.py
2023-12-16 13:34:56 +08:00

84 lines
2.9 KiB
Python

import PIL.Image
import cv2
import torch
from loguru import logger
from lama_cleaner.model.base import DiffusionInpaintModel
from lama_cleaner.schema import Config
class InstructPix2Pix(DiffusionInpaintModel):
name = "timbrooks/instruct-pix2pix"
pad_mod = 8
min_size = 512
def init_model(self, device: torch.device, **kwargs):
from diffusers import StableDiffusionInstructPix2PixPipeline
fp16 = not kwargs.get("no_half", False)
model_kwargs = {}
if kwargs["disable_nsfw"] or kwargs.get("cpu_offload", False):
logger.info("Disable Stable Diffusion Model NSFW checker")
model_kwargs.update(
dict(
safety_checker=None,
feature_extractor=None,
requires_safety_checker=False,
)
)
use_gpu = device == torch.device("cuda") and torch.cuda.is_available()
torch_dtype = torch.float16 if use_gpu and fp16 else torch.float32
self.model = StableDiffusionInstructPix2PixPipeline.from_pretrained(
"timbrooks/instruct-pix2pix",
revision="fp16" if use_gpu and fp16 else "main",
torch_dtype=torch_dtype,
**model_kwargs
)
self.model.enable_attention_slicing()
if kwargs.get("enable_xformers", False):
self.model.enable_xformers_memory_efficient_attention()
if kwargs.get("cpu_offload", False) and use_gpu:
logger.info("Enable sequential cpu offload")
self.model.enable_sequential_cpu_offload(gpu_id=0)
else:
self.model = self.model.to(device)
@staticmethod
def download():
from diffusers import StableDiffusionInstructPix2PixPipeline
StableDiffusionInstructPix2PixPipeline.from_pretrained(
"timbrooks/instruct-pix2pix", revision="fp16"
)
def forward(self, image, mask, config: Config):
"""Input image and output image have same size
image: [H, W, C] RGB
mask: [H, W, 1] 255 means area to repaint
return: BGR IMAGE
edit = pipe(prompt, image=image, num_inference_steps=20, image_guidance_scale=1.5, guidance_scale=7).images[0]
"""
output = self.model(
image=PIL.Image.fromarray(image),
prompt=config.prompt,
negative_prompt=config.negative_prompt,
num_inference_steps=config.sd_steps,
image_guidance_scale=config.p2p_image_guidance_scale,
guidance_scale=config.sd_guidance_scale,
output_type="np",
generator=torch.manual_seed(config.sd_seed),
).images[0]
output = (output * 255).round().astype("uint8")
output = cv2.cvtColor(output, cv2.COLOR_RGB2BGR)
return output
@staticmethod
def is_downloaded() -> bool:
# model will be downloaded when app start, and can't switch in frontend settings
return True