cnn bigru图像分类代码
时间: 2023-06-24 20:03:13 浏览: 73
以下是一个使用CNN和BiGRU实现图像分类的示例代码:
```python
import tensorflow as tf
from tensorflow.keras.layers import Conv2D, MaxPooling2D, Input, Dense, Dropout, Flatten, Bidirectional, GRU
from tensorflow.keras.models import Model
# 定义CNN模型
def cnn_model():
inputs = Input(shape=(28, 28, 1))
x = Conv2D(32, (3, 3), activation='relu')(inputs)
x = MaxPooling2D((2, 2))(x)
x = Conv2D(64, (3, 3), activation='relu')(x)
x = MaxPooling2D((2, 2))(x)
x = Conv2D(128, (3, 3), activation='relu')(x)
x = MaxPooling2D((2, 2))(x)
x = Flatten()(x)
x = Dense(128, activation='relu')(x)
x = Dropout(0.5)(x)
outputs = Dense(10, activation='softmax')(x)
model = Model(inputs=inputs, outputs=outputs)
return model
# 定义BiGRU模型
def bigru_model():
inputs = Input(shape=(28, 28))
x = Bidirectional(GRU(128, return_sequences=True))(inputs)
x = Dropout(0.5)(x)
x = Bidirectional(GRU(128))(x)
x = Dropout(0.5)(x)
outputs = Dense(10, activation='softmax')(x)
model = Model(inputs=inputs, outputs=outputs)
return model
# 将CNN和BiGRU模型连接起来
def cnn_bigru_model():
cnn_input = Input(shape=(28, 28, 1))
cnn_model = cnn_model()(cnn_input)
cnn_model = Model(inputs=cnn_input, outputs=cnn_model)
bigru_input = Input(shape=(28, 28))
bigru_model = bigru_model()(bigru_input)
bigru_model = Model(inputs=bigru_input, outputs=bigru_model)
combined = tf.keras.layers.concatenate([cnn_model.output, bigru_model.output])
x = Dense(64, activation='relu')(combined)
x = Dropout(0.5)(x)
outputs = Dense(10, activation='softmax')(x)
model = Model(inputs=[cnn_model.input, bigru_model.input], outputs=outputs)
return model
# 编译模型
model = cnn_bigru_model()
model.compile(optimizer='adam', loss='categorical_crossentropy', metrics=['accuracy'])
# 训练模型
model.fit([x_train, x_train], y_train, batch_size=128, epochs=10, validation_data=([x_test, x_test], y_test))
```
在这个例子中,我们首先定义了一个包含三个卷积层和两个全连接层的CNN模型。然后,我们定义了一个包含两个双向GRU层的BiGRU模型。最后,我们将这两个模型连接在一起,并添加了一些额外的全连接层来进行分类。我们使用Adam优化器和分类交叉熵损失来编译模型,并使用训练数据进行训练。
请注意,这只是一个简单的示例,您可能需要根据您的数据和需求进行一些修改。