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77 строки
2.7 KiB
Python
77 строки
2.7 KiB
Python
from misinformation.utils import AnalysisMethod
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import torch
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from PIL import Image
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from lavis.models import load_model_and_preprocess
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class SummaryDetector(AnalysisMethod):
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def __init__(self, subdict: dict) -> None:
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super().__init__(subdict)
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summary_device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
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summary_model, summary_vis_processors, _ = load_model_and_preprocess(
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name="blip_caption",
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model_type="base_coco",
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is_eval=True,
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device=summary_device,
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)
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def analyse_image(self, summary_model=None, summary_vis_processors=None):
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if summary_model is None and summary_vis_processors is None:
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summary_model = SummaryDetector.summary_model
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summary_vis_processors = SummaryDetector.summary_vis_processors
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path = self.subdict["filename"]
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raw_image = Image.open(path).convert("RGB")
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image = (
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summary_vis_processors["eval"](raw_image)
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.unsqueeze(0)
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.to(self.summary_device)
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)
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with torch.no_grad():
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self.subdict["const_image_summary"] = summary_model.generate(
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{"image": image}
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)[0]
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self.subdict["3_non-deterministic summary"] = summary_model.generate(
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{"image": image}, use_nucleus_sampling=True, num_captions=3
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)
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return self.subdict
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(
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summary_VQA_model,
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summary_VQA_vis_processors,
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summary_VQA_txt_processors,
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) = load_model_and_preprocess(
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name="blip_vqa", model_type="vqav2", is_eval=True, device=summary_device
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)
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def analyse_questions(self, list_of_questions):
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if len(list_of_questions) > 0:
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path = self.subdict["filename"]
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raw_image = Image.open(path).convert("RGB")
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image = (
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self.summary_VQA_vis_processors["eval"](raw_image)
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.unsqueeze(0)
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.to(self.summary_device)
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)
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question_batch = []
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for quest in list_of_questions:
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question_batch.append(self.summary_VQA_txt_processors["eval"](quest))
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batch_size = len(list_of_questions)
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image_batch = image.repeat(batch_size, 1, 1, 1)
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with torch.no_grad():
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answers_batch = self.summary_VQA_model.predict_answers(
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samples={"image": image_batch, "text_input": question_batch},
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inference_method="generate",
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)
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for q, a in zip(question_batch, answers_batch):
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self.subdict[q] = a
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else:
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print("Please, enter list of questions")
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return self.subdict
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