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from functools import lru_cache
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from diffusers.pipelines.stable_diffusion.safety_checker import (
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StableDiffusionSafetyChecker,
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)
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from transformers import AutoFeatureExtractor
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@lru_cache()
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def safety_models():
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safety_model_id = "CompVis/stable-diffusion-safety-checker"
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safety_feature_extractor = AutoFeatureExtractor.from_pretrained(safety_model_id)
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safety_checker = StableDiffusionSafetyChecker.from_pretrained(safety_model_id)
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return safety_feature_extractor, safety_checker
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def is_nsfw(img, x_sample, half_mode=False):
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safety_feature_extractor, safety_checker = safety_models()
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safety_checker_input = safety_feature_extractor([img], return_tensors="pt")
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clip_input = safety_checker_input.pixel_values
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_, has_nsfw_concept = safety_checker(
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images=x_sample[None, :], clip_input=clip_input
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)
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return has_nsfw_concept[0]
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