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# 특성 추출기 [[feature-extractor]]

특성 추출기는 오디오 또는 비전 모델을 위한 입력 특성을 준비하는 역할을 합니다. 여기에는 시퀀스에서 특성을 추출하는 작업(예를 들어, 오디오 파일을 전처리하여 Log-Mel 스펙트로그램 특성을 생성하는 것), 이미지에서 특성을 추출하는 작업(예를 들어, 이미지 파일을 자르는 것)이 포함됩니다. 뿐만 아니라 패딩, 정규화 및 NumPy, PyTorch, TensorFlow 텐서로의 변환도 포함됩니다.


## FeatureExtractionMixin [[transformers.FeatureExtractionMixin]]

[[autodoc]] feature_extraction_utils.FeatureExtractionMixin
    - from_pretrained
    - save_pretrained

## SequenceFeatureExtractor [[transformers.SequenceFeatureExtractor]]

[[autodoc]] SequenceFeatureExtractor
    - pad

## BatchFeature [[transformers.BatchFeature]]

[[autodoc]] BatchFeature

## ImageFeatureExtractionMixin [[transformers.ImageFeatureExtractionMixin]]

[[autodoc]] image_utils.ImageFeatureExtractionMixin