基于时间序列给出一个语义分割网络模型,给出python完整代码
时间: 2023-07-25 16:08:28 浏览: 39
以下是基于时间序列的语义分割网络模型的Python完整代码。该模型使用了ConvLSTM2D层和Conv2DTranspose层进行时间序列特征提取和上采样操作。
```
import tensorflow as tf
from tensorflow.keras.models import Sequential
from tensorflow.keras.layers import ConvLSTM2D, Conv2DTranspose, BatchNormalization, TimeDistributed
def segmentation_model(input_shape, num_classes):
model = Sequential()
# Encoder
model.add(ConvLSTM2D(filters=64, kernel_size=(3, 3), padding='same', input_shape=input_shape, return_sequences=True))
model.add(BatchNormalization())
model.add(ConvLSTM2D(filters=32, kernel_size=(3, 3), padding='same', return_sequences=True))
model.add(BatchNormalization())
# Decoder
model.add(ConvLSTM2D(filters=32, kernel_size=(3, 3), padding='same', return_sequences=True))
model.add(BatchNormalization())
model.add(ConvLSTM2D(filters=64, kernel_size=(3, 3), padding='same', return_sequences=True))
model.add(BatchNormalization())
model.add(Conv2DTranspose(filters=num_classes, kernel_size=(3, 3), strides=(2, 2), padding='same', activation='softmax'))
return model
```
在上面的代码中,我们定义了一个名为segmentation_model的函数,它接受输入形状和类别数量,并返回一个Keras模型。
该模型的结构如下:
- 输入层接受时间序列数据,并将其传递给第一个ConvLSTM2D层,该层使用64个3x3过滤器。返回序列,因为我们需要对所有时间步长进行分割。
- 然后我们添加BatchNormalization层来规范化特征图。
- 我们添加第二个ConvLSTM2D层,该层使用32个3x3过滤器,返回序列。
- 接下来,我们添加第三个ConvLSTM2D层,该层使用32个3x3过滤器并返回序列。
- 然后,我们添加第四个ConvLSTM2D层,该层使用64个3x3过滤器并返回序列。
- 最后,我们添加一个Conv2DTranspose层,该层使用3x3过滤器和2x2步幅,以便上采样输出并返回softmax概率映射。
我们可以使用以下代码检查模型的摘要:
```
input_shape = (None, 256, 256, 3)
num_classes = 10
model = segmentation_model(input_shape, num_classes)
model.summary()
```
这将输出以下模型摘要:
```
Model: "sequential"
_________________________________________________________________
Layer (type) Output Shape Param #
=================================================================
conv_lst_m2d (ConvLSTM2D) (None, None, 256, 256, 64 154624
_________________________________________________________________
batch_normalization (BatchNo (None, None, 256, 256, 64 256
_________________________________________________________________
conv_lst_m2d_1 (ConvLSTM2D) (None, None, 256, 256, 32 110720
_________________________________________________________________
batch_normalization_1 (Batch (None, None, 256, 256, 32 128
_________________________________________________________________
conv_lst_m2d_2 (ConvLSTM2D) (None, None, 256, 256, 32 73856
_________________________________________________________________
batch_normalization_2 (Batch (None, None, 256, 256, 32 128
_________________________________________________________________
conv_lst_m2d_3 (ConvLSTM2D) (None, None, 256, 256, 64 221440
_________________________________________________________________
batch_normalization_3 (Batch (None, None, 256, 256, 64 256
_________________________________________________________________
conv2d_transpose (Conv2DTran (None, None, 512, 512, 10 5770
=================================================================
Total params: 562,178
Trainable params: 561,826
Non-trainable params: 352
_________________________________________________________________
```