tf.keras.backend.categorical_crossentropy()等同于tf.keras.losses.categorical_crossentropy()

tf.keras.backend.binary_crossentropy()

tensorflow.keras.backend. permute_dimensions()等同于tf.transpose()

tensorflow.keras.backend.mean()等同于tf.math.reduce_mean()

tensorflow.keras.backend.sum()等同于tf.math.reduce_sum()

pickle load文件时报AttributeError: Can't get attribute 'Config' 错误

NMS 非极大值抑制

感受野（视野）

end to end

Faster R-CNN