"""
Overview:
Get edge with lineart model.
Having the **best effect**, closest to the drawing lines,
but consuming a large amount of memory and computing power at runtime.
"""
from functools import lru_cache, partial
from typing import Optional
import numpy as np
from PIL import Image
from huggingface_hub import hf_hub_download
from ._base import resize_image, cv2_resize, _get_image_edge
from ..data import ImageTyping, load_image
from ..utils import open_onnx_model
def _preprocess(input_image: Image.Image, detect_resolution: int = 512):
input_image = np.array(input_image, dtype=np.uint8)
input_image = resize_image(input_image, detect_resolution)
return (input_image / 255.0).transpose(2, 0, 1)[None, ...].astype(np.float32)
@lru_cache()
def _open_la_model(coarse: bool):
return open_onnx_model(hf_hub_download(
'deepghs/imgutils-models',
f'lineart/{"lineart.onnx" if not coarse else "lineart_coarse.onnx"}',
))
[docs]def get_edge_by_lineart(image: ImageTyping, coarse: bool = False, detect_resolution: int = 512):
"""
Overview:
Get edge mask with lineart model.
:param image: Original image (assuming its size is ``HxW``).
:param coarse: Use coarse model. In the coarse model, the lines will be deeper and richer,
but the probability of extra lines or content appearing will increase.
:param detect_resolution: Resolution when passing the image into neural network. Default is ``512``.
:return: A mask with format ``float32[H, W]``.
"""
image = load_image(image, mode='RGB')
output_, = _open_la_model(coarse).run(['output'], {'input': _preprocess(image, detect_resolution)})
output_ = cv2_resize(output_[0].transpose(1, 2, 0), image.width, image.height)
return 1.0 - output_.clip(0.0, 1.0)
[docs]def edge_image_with_lineart(image: ImageTyping, coarse: bool = False, detect_resolution: int = 512,
backcolor: str = 'white', forecolor: Optional[str] = None):
"""
Overview:
Get an image with the extracted edge from ``image``.
:param image: Original image (assuming its size is ``HxW``).
:param coarse: Use coarse model. In the coarse model, the lines will be deeper and richer,
but the probability of extra lines or content appearing will increase.
:param detect_resolution: Resolution when passing the image into neural network. Default is ``512``.
:param backcolor: Background color the target image. Default is ``white``. When ``transparent`` is given, \
the background will be transparent.
:param forecolor: Fore color of the target image. Default is ``None`` which means use the color \
from the given ``image``.
:return: An image with the extracted edge from ``image``.
Examples::
.. image:: lineart.plot.py.svg
:align: center
When ``coarse`` is used:
.. image:: lineart_coarse.plot.py.svg
:align: center
"""
return _get_image_edge(
image,
partial(get_edge_by_lineart, coarse=coarse, detect_resolution=detect_resolution),
backcolor, forecolor
)