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ImageDataGenerator?Keras.preprocessing.image??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

??????

• featurewise_center?????????????????????????????????????
• samplewise_center??????????????????????????????????
• featurewise_std_normalization?????????????????????????????
• samplewise_std_normalization?????????????????????????????????
• zca_whitening????????????ZCA??????????????
• rotation_range????????????????????????0?180??
• width_shift_range????????????????????0?1?
• height_shift_range????????????????????0?1?
• shear_range?????????????????
• zoom_range??????????????????????[lower, upper]????????????????
• channel_shift_range?????????????????
• fill_mode?????????constant???nearest???reflect???wrap???????????????????????
• cveta????????????constant????????????
• horizontal_flip????????????????
• vertical_flip????????????????
• rescale???????????????????????????????0?1?
• preprocessing_function?????????????????????????????
• data_format?????????????????????channel_first???channel_last??????

????

train_datagen = ImageDataGenerator(
    preprocessing_function=preprocess_input,
    rotation_range=30,
    width_shift_range=0.2,
    height_shift_range=0.2,
    shear_range=0.2,
    zoom_range=0.2,
    horizontal_flip=True
)

??????

• shear_range??????????????x?y???????????????????????????
• zoom_range????????????????0?1????????1????????????????????????????
• fill_mode????????????nearest??????????????????????????????constant?????????reflect???????wrap????????

??????ImageDataGenerator???????????????????????????????????

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