我使用转移学习来训练模型。基本模型是efficientNet
。
您可以详细了解here
from tensorflow import keras
from keras.models import Sequential,Model
from keras.layers import Dense,Dropout,Conv2D,MaxPooling2D,
Flatten,BatchNormalization, Activation
from keras.optimizers import RMSprop , Adam ,SGD
from keras.backend import sigmoid
类SwishActivation(Activation):
def __init__(self, activation, **kwargs):
super(SwishActivation, self).__init__(activation, **kwargs)
self.__name__ = 'swish_act'
def swish_act(x, beta = 1):
return (x * sigmoid(beta * x))
from keras.utils.generic_utils import get_custom_objects
from keras.layers import Activation
get_custom_objects().update({'swish_act': SwishActivation(swish_act)})
model = enet.EfficientNetB0(include_top=False, input_shape=(150,50,3), pooling='avg', weights='imagenet')
x = model.output
x = BatchNormalization()(x)
x = Dropout(0.7)(x)
x = Dense(512)(x)
x = BatchNormalization()(x)
x = Activation(swish_act)(x)
x = Dropout(0.5)(x)
x = Dense(128)(x)
x = BatchNormalization()(x)
x = Activation(swish_act)(x)
x = Dense(64)(x)
x = Dense(32)(x)
x = Dense(16)(x)
# Output layer
predictions = Dense(1, activation="sigmoid")(x)
model_final = Model(inputs = model.input, outputs = predictions)
model_final.summary()
我使用以下方法保存了它:
model.save('model.h5')
尝试加载它时出现以下错误:
model=tf.keras.models.load_model('model.h5')
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-12-e3bef1680e4f> in <module>()
1 # Recreate the exact same model, including its weights and the optimizer
----> 2 model = tf.keras.models.load_model('PhoneDetection-CNN_29_July.h5')
3
4 # Show the model architecture
5 model.summary()
10 frames
/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/utils/generic_utils.py in class_and_config_for_serialized_keras_object(config, module_objects, custom_objects, printable_module_name)
319 cls = get_registered_object(class_name, custom_objects, module_objects)
320 if cls is None:
--> 321 raise ValueError('Unknown ' + printable_module_name + ': ' + class_name)
322
323 cls_config = config['config']
ValueError: Unknown layer: FixedDropout
```python
答案 0 :(得分:1)
我在尝试通过加载我保存的模型进行推理时遇到了同样的错误。
然后我刚刚在我的推理笔记本中导入了 -560
库,错误消失了。
我的导入命令看起来像:
effiecientNet
(请注意,如果您还没有安装 effiecientNet(这不太可能),您可以使用 import efficientnet.keras as efn
命令来安装。)
答案 1 :(得分:0)
我在最近的模型上遇到了同样的问题。研究源代码,您可以找到 FixedDropout 类。我通过导入后端和层将其添加到我的推理代码中。该费率还应与您的 Effectivenet 模型中的费率相匹配,因此对于 EfficientNetB0,费率为 0.2(其他则不同)。
from tensorflow.keras import backend, layers
class FixedDropout(layers.Dropout):
def _get_noise_shape(self, inputs):
if self.noise_shape is None:
return self.noise_shape
symbolic_shape = backend.shape(inputs)
noise_shape = [symbolic_shape[axis] if shape is None else shape
for axis, shape in enumerate(self.noise_shape)]
return tuple(noise_shape)
model = keras.models.load_model('model.h5', custom_objects={'FixedDropout':FixedDropout(rate=0.2)})