用matlab编写卷积神经网络的图像识别程序
时间: 2024-05-01 14:22:05 浏览: 98
以下是一个简单的使用MATLAB编写卷积神经网络的图像识别程序:
1. 导入数据集
```
[trainImages, trainLabels] = digitTrainCellArrayData;
[testImages, testLabels] = digitTestCellArrayData;
```
2. 定义网络结构
```
layers = [
imageInputLayer([28 28 1])
convolution2dLayer(5,20)
reluLayer
maxPooling2dLayer(2,'Stride',2)
convolution2dLayer(5,50)
reluLayer
maxPooling2dLayer(2,'Stride',2)
fullyConnectedLayer(500)
reluLayer
fullyConnectedLayer(10)
softmaxLayer
classificationLayer];
```
3. 设置训练选项
```
options = trainingOptions('sgdm', ...
'MaxEpochs',15, ...
'InitialLearnRate',0.01);
```
4. 训练网络
```
net = trainNetwork(trainImages,trainLabels,layers,options);
```
5. 对测试集进行预测
```
predictedLabels = classify(net,testImages);
```
6. 计算准确率
```
accuracy = sum(predictedLabels == testLabels)/numel(testLabels);
fprintf('Accuracy: %.2f%%\n',accuracy*100);
```
注意:此示例使用了内置的MNIST数据集,如果您使用自己的数据集,请相应地更改导入数据集的代码。
阅读全文