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import os
from typing import List
import numpy as np
import pooch
from PIL import Image
from PIL.Image import Image as PILImage
from .base import BaseSession
class DisSession(BaseSession):
def predict(self, img: PILImage, *args, **kwargs) -> List[PILImage]:
"""
Predicts the mask image for the input image.
This method takes a PILImage object as input and returns a list of PILImage objects as output. It performs several image processing operations to generate the mask image.
Parameters:
img (PILImage): The input image.
Returns:
List[PILImage]: A list of PILImage objects representing the generated mask image.
"""
ort_outs = self.inner_session.run(
None,
self.normalize(img, (0.485, 0.456, 0.406), (1.0, 1.0, 1.0), (1024, 1024)),
)
pred = ort_outs[0][:, 0, :, :]
ma = np.max(pred)
mi = np.min(pred)
pred = (pred - mi) / (ma - mi)
pred = np.squeeze(pred)
mask = Image.fromarray((pred * 255).astype("uint8"), mode="L")
mask = mask.resize(img.size, Image.Resampling.LANCZOS)
return [mask]
@classmethod
def download_models(cls, *args, **kwargs):
"""
Downloads the pre-trained model file.
This class method downloads the pre-trained model file from a specified URL using the pooch library.
Parameters:
args: Additional positional arguments.
kwargs: Additional keyword arguments.
Returns:
str: The path to the downloaded model file.
"""
fname = f"{cls.name(*args, **kwargs)}.onnx"
pooch.retrieve(
"https://github.com/danielgatis/rembg/releases/download/v0.0.0/isnet-general-use.onnx",
(
None
if cls.checksum_disabled(*args, **kwargs)
else "md5:fc16ebd8b0c10d971d3513d564d01e29"
),
fname=fname,
path=cls.u2net_home(*args, **kwargs),
progressbar=True,
)
return os.path.join(cls.u2net_home(*args, **kwargs), fname)
@classmethod
def name(cls, *args, **kwargs):
"""
Returns the name of the model.
This class method returns the name of the model.
Parameters:
args: Additional positional arguments.
kwargs: Additional keyword arguments.
Returns:
str: The name of the model.
"""
return "isnet-general-use"
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