用卷积搭建三分类的EfficientNet的B4的代码
时间: 2024-04-30 13:22:30 浏览: 20
以下是使用卷积搭建三分类的EfficientNet的B4的代码:
```python
import tensorflow as tf
from tensorflow.keras.layers import Input, Conv2D, BatchNormalization, Activation, GlobalAveragePooling2D, Dense
from tensorflow.keras.models import Model
from efficientnet.tfkeras import EfficientNetB4
def efficientnet_b4(num_classes):
inputs = Input(shape=(224, 224, 3))
base_model = EfficientNetB4(include_top=False, input_tensor=inputs, weights='imagenet')
x = Conv2D(1280, kernel_size=1, strides=1, padding='same')(base_model.output)
x = BatchNormalization()(x)
x = Activation('swish')(x)
x = GlobalAveragePooling2D()(x)
outputs = Dense(num_classes, activation='softmax')(x)
model = Model(inputs=inputs, outputs=outputs)
return model
```
该函数接受一个整数参数`num_classes`,表示分类的类别数。它首先创建一个输入层,然后使用`EfficientNetB4`模型作为基础模型。接下来,我们添加一个`1x1`卷积层,将模型的输出通道数从1792转换为1280,并应用批归一化和Swish激活函数。然后,我们使用全局平均池化层将每个特征映射的平均值转换为单个值,最后使用一个全连接层输出分类预测。