用vggish-keras从WAV文件中提取音频特征的代码并保存
时间: 2023-04-05 16:00:28 浏览: 231
以下是使用vggish-keras从WAV文件中提取音频特征的代码,并将其保存为numpy数组的示例代码:
```python
import numpy as np
import librosa
from vggish_keras import VGGish
# Load the VGGish model
vggish = VGGish()
# Load the audio file
audio_file = 'path/to/audio.wav'
audio, sr = librosa.load(audio_file, sr=vggish.sample_rate, mono=True)
# Extract the audio features using VGGish
features = vggish.extract_features(audio)
# Save the features as a numpy array
np.save('path/to/features.npy', features)
```
请注意,这只是一个示例代码,您需要根据您的具体情况进行修改。
相关问题
用vggish-keras提取音频特征的代码
以下是使用vggish-keras提取音频特征的代码:
```python
import numpy as np
import tensorflow as tf
from keras.models import Model
from keras.layers import Input, Dense, Dropout, Flatten
from keras.optimizers import Adam
from vggish_keras import VGGish
# Load VGGish model
vggish = VGGish(include_top=False, input_shape=(None, 96, 1))
# Freeze all layers except the last one
for layer in vggish.layers[:-1]:
layer.trainable = False
# Add a dense layer and output layer
x = Flatten()(vggish.output)
x = Dense(512, activation='relu')(x)
x = Dropout(0.5)(x)
output = Dense(128, activation='softmax')(x)
# Create a new model with VGGish and the dense layers
model = Model(inputs=vggish.input, outputs=output)
# Compile the model
model.compile(optimizer=Adam(lr=0.001), loss='categorical_crossentropy', metrics=['accuracy'])
# Load audio data and preprocess it
audio_data = np.load('audio_data.npy')
audio_data = np.expand_dims(audio_data, axis=-1)
# Train the model
model.fit(audio_data, labels, epochs=10, batch_size=32)
```
希望对你有帮助!
搭建一个提取人脸特征并保存在表格中的神经网络的代码
好的,以下是一个简单的示例代码,用于提取人脸特征并保存在表格中:
```python
import cv2
import numpy as np
import pandas as pd
import tensorflow as tf
from tensorflow.keras.models import Model
from tensorflow.keras.layers import Input, Conv2D, MaxPooling2D, Flatten, Dense
# 准备数据集
images = [] # 存放人脸图像
labels = [] # 存放人脸标签
# 数据预处理
def preprocess_image(image):
# 图像预处理代码
return image
# 搭建神经网络
def build_model():
input_layer = Input(shape=(256, 256, 3))
conv1 = Conv2D(32, (3, 3), activation='relu', padding='same')(input_layer)
pool1 = MaxPooling2D((2, 2))(conv1)
conv2 = Conv2D(64, (3, 3), activation='relu', padding='same')(pool1)
pool2 = MaxPooling2D((2, 2))(conv2)
conv3 = Conv2D(128, (3, 3), activation='relu', padding='same')(pool2)
pool3 = MaxPooling2D((2, 2))(conv3)
conv4 = Conv2D(256, (3, 3), activation='relu', padding='same')(pool3)
pool4 = MaxPooling2D((2, 2))(conv4)
flatten = Flatten()(pool4)
dense1 = Dense(512, activation='relu')(flatten)
output_layer = Dense(128, activation='relu')(dense1)
model = Model(inputs=input_layer, outputs=output_layer)
return model
# 训练模型
def train_model():
# 构建模型
model = build_model()
# 编译模型
model.compile(optimizer='adam', loss='mean_squared_error')
# 训练模型
model.fit(images, labels, epochs=10)
# 保存模型
model.save('face_recognition_model.h5')
# 加载模型
def load_model():
# 加载模型
model = tf.keras.models.load_model('face_recognition_model.h5')
return model
# 提取人脸特征并保存在表格中
def extract_features(image):
# 加载模型
model = load_model()
# 预处理图像
image = preprocess_image(image)
# 提取特征
features = model.predict(np.array([image]))
# 保存特征
df = pd.DataFrame(features)
df.to_csv('features.csv', index=False)
# 测试代码
image = cv2.imread('face.jpg')
extract_features(image)
```
在该示例代码中,我们使用了 TensorFlow 框架搭建了一个简单的卷积神经网络模型,用于提取人脸特征。该模型包含了多个卷积层、池化层和全连接层,以及 Rectified Linear Unit (ReLU) 激活函数和均方误差 (Mean Squared Error, MSE) 损失函数。我们使用数据集对模型进行了训练,并保存了训练好的模型。
在提取人脸特征时,我们首先加载了训练好的模型,并对输入图像进行了预处理。然后,我们使用模型的 predict() 方法提取了图像的特征,并将其保存在了一个 CSV 文件中。