inputs = Input((img_height, img_width, img_ch))
conv1 = Conv2D(n_filters, (k, k), padding=padding)(inputs)
conv1 = BatchNormalization(scale=False, axis=3)(conv1)
conv1 = Activation('relu')(conv1)
conv1 = Conv2D(n_filters, (k, k), padding=padding)(conv1)
conv1 = BatchNormalization(scale=False, axis=3)(conv1)
conv1 = Activation('relu')(conv1)
pool1 = MaxPooling2D(pool_size=(s, s))(conv1)
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在BatchNormalization 我阅读了 keras 文档但我不明白它的 (axis =3) 是什么意思,谁能解释一下axis是什么意思?