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https://github.com/invoke-ai/InvokeAI
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119 lines
4.3 KiB
Python
119 lines
4.3 KiB
Python
# Copyright (c) 2022 Kyle Schouviller (https://github.com/kyle0654) & the InvokeAI Team
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from typing import Literal
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import cv2
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import numpy as np
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from PIL import Image
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from pydantic import ConfigDict
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from invokeai.app.invocations.fields import ImageField
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from invokeai.app.invocations.primitives import ImageOutput
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from invokeai.app.services.shared.invocation_context import InvocationContext
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from invokeai.backend.image_util.basicsr.rrdbnet_arch import RRDBNet
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from invokeai.backend.image_util.realesrgan.realesrgan import RealESRGAN
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from invokeai.backend.util.devices import TorchDevice
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from .baseinvocation import BaseInvocation, invocation
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from .fields import InputField, WithBoard, WithMetadata
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# TODO: Populate this from disk?
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# TODO: Use model manager to load?
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ESRGAN_MODELS = Literal[
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"RealESRGAN_x4plus.pth",
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"RealESRGAN_x4plus_anime_6B.pth",
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"ESRGAN_SRx4_DF2KOST_official-ff704c30.pth",
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"RealESRGAN_x2plus.pth",
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]
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ESRGAN_MODEL_URLS: dict[str, str] = {
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"RealESRGAN_x4plus.pth": "https://github.com/xinntao/Real-ESRGAN/releases/download/v0.1.0/RealESRGAN_x4plus.pth",
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"RealESRGAN_x4plus_anime_6B.pth": "https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.2.4/RealESRGAN_x4plus_anime_6B.pth",
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"ESRGAN_SRx4_DF2KOST_official-ff704c30.pth": "https://github.com/xinntao/Real-ESRGAN/releases/download/v0.1.1/ESRGAN_SRx4_DF2KOST_official-ff704c30.pth",
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"RealESRGAN_x2plus.pth": "https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.1/RealESRGAN_x2plus.pth",
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}
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@invocation("esrgan", title="Upscale (RealESRGAN)", tags=["esrgan", "upscale"], category="esrgan", version="1.3.2")
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class ESRGANInvocation(BaseInvocation, WithMetadata, WithBoard):
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"""Upscales an image using RealESRGAN."""
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image: ImageField = InputField(description="The input image")
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model_name: ESRGAN_MODELS = InputField(default="RealESRGAN_x4plus.pth", description="The Real-ESRGAN model to use")
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tile_size: int = InputField(
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default=400, ge=0, description="Tile size for tiled ESRGAN upscaling (0=tiling disabled)"
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)
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model_config = ConfigDict(protected_namespaces=())
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def invoke(self, context: InvocationContext) -> ImageOutput:
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image = context.images.get_pil(self.image.image_name)
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rrdbnet_model = None
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netscale = None
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if self.model_name in [
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"RealESRGAN_x4plus.pth",
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"ESRGAN_SRx4_DF2KOST_official-ff704c30.pth",
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]:
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# x4 RRDBNet model
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rrdbnet_model = RRDBNet(
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num_in_ch=3,
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num_out_ch=3,
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num_feat=64,
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num_block=23,
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num_grow_ch=32,
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scale=4,
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)
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netscale = 4
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elif self.model_name in ["RealESRGAN_x4plus_anime_6B.pth"]:
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# x4 RRDBNet model, 6 blocks
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rrdbnet_model = RRDBNet(
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num_in_ch=3,
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num_out_ch=3,
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num_feat=64,
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num_block=6, # 6 blocks
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num_grow_ch=32,
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scale=4,
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)
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netscale = 4
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elif self.model_name in ["RealESRGAN_x2plus.pth"]:
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# x2 RRDBNet model
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rrdbnet_model = RRDBNet(
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num_in_ch=3,
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num_out_ch=3,
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num_feat=64,
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num_block=23,
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num_grow_ch=32,
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scale=2,
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)
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netscale = 2
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else:
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msg = f"Invalid RealESRGAN model: {self.model_name}"
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context.logger.error(msg)
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raise ValueError(msg)
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loadnet = context.models.load_ckpt_from_url(
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source=ESRGAN_MODEL_URLS[self.model_name],
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)
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upscaler = RealESRGAN(
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scale=netscale,
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loadnet=loadnet.model,
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model=rrdbnet_model,
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half=False,
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tile=self.tile_size,
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)
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# prepare image - Real-ESRGAN uses cv2 internally, and cv2 uses BGR vs RGB for PIL
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# TODO: This strips the alpha... is that okay?
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cv2_image = cv2.cvtColor(np.array(image.convert("RGB")), cv2.COLOR_RGB2BGR)
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upscaled_image = upscaler.upscale(cv2_image)
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pil_image = Image.fromarray(cv2.cvtColor(upscaled_image, cv2.COLOR_BGR2RGB)).convert("RGBA")
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TorchDevice.empty_cache()
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image_dto = context.images.save(image=pil_image)
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return ImageOutput.build(image_dto)
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