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import os

from annotator.uniformer.mmseg.apis import init_segmentor, inference_segmentor, show_result_pyplot
from annotator.uniformer.mmseg.core.evaluation import get_palette
from annotator.util import annotator_ckpts_path


checkpoint_file = "https://huggingface.co/lllyasviel/ControlNet/resolve/main/annotator/ckpts/upernet_global_small.pth"


class UniformerDetector:
    def __init__(self):
        modelpath = os.path.join(annotator_ckpts_path, "upernet_global_small.pth")
        if not os.path.exists(modelpath):
            from basicsr.utils.download_util import load_file_from_url
            load_file_from_url(checkpoint_file, model_dir=annotator_ckpts_path)
        config_file = os.path.join(os.path.dirname(annotator_ckpts_path), "uniformer", "exp", "upernet_global_small", "config.py")
        self.model = init_segmentor(config_file, modelpath).cuda()

    def __call__(self, img):
        result = inference_segmentor(self.model, img)
        res_img = show_result_pyplot(self.model, img, result, get_palette('ade'), opacity=1)
        return res_img