layers = [ imageInputLayer([28 28 1],"Name","imageinput") convolution2dLayer([3 3],32,"Name","conv_1","Padding","same") reluLayer("Name","relu_1") convolution2dLayer([3 3],32,"Name","conv_3","Padding","same") reluLayer("Name","relu_3") maxPooling2dLayer([5 5],"Name","maxpool_3","Padding","same") convolution2dLayer([3 3],32,"Name","conv_4","Padding","same") reluLayer("Name","relu_4") maxPooling2dLayer([5 5],"Name","maxpool_1","Padding","same") convolution2dLayer([3 3],32,"Name","conv_2","Padding","same") reluLayer("Name","relu_2") maxPooling2dLayer([5 5],"Name","maxpool_2","Padding","same") fullyConnectedLayer(10,"Name","fc") softmaxLayer("Name","softmax") classificationLayer("Name","classoutput")];怎么改增加学习率达到百分之99
时间: 2023-07-08 09:47:56 浏览: 114
你可以通过修改训练选项来增加学习率,从而达到更高的准确率。具体地说,你可以将学习速率因子设置为一个更高的值,例如0.1或0.01。这可以通过以下代码实现:
```
options = trainingOptions('sgdm', ...
'MaxEpochs',20, ...
'InitialLearnRate',0.1, ...
'LearnRateSchedule','piecewise', ...
'LearnRateDropFactor',0.1, ...
'LearnRateDropPeriod',5, ...
'MiniBatchSize',128, ...
'Plots','training-progress');
```
在此示例中,学习率初始值为0.1,并在每5个时期后以0.1的因子降低学习率。你可以尝试不同的学习率和其他选项来找到最佳模型。
相关问题
layers = [ imageInputLayer([28 28 1],"Name","imageinput") convolution2dLayer([3 3],32,"Name","conv_4","Padding","same") reluLayer("Name","relu_4") convolution2dLayer([3 3],32,"Name","conv_2","Padding","same") reluLayer("Name","relu_2") maxPooling2dLayer([5 5],"Name","maxpool_2","Padding","same") convolution2dLayer([3 3],32,"Name","conv_3","Padding","same") reluLayer("Name","relu_3") maxPooling2dLayer([5 5],"Name","maxpool_3","Padding","same") convolution2dLayer([3 3],32,"Name","conv_1","Padding","same") reluLayer("Name","relu_1") maxPooling2dLayer([5 5],"Name","maxpool_1","Padding","same") fullyConnectedLayer(10,"Name","fc") softmaxLayer("Name","softmax") classificationLayer("Name","classoutput")];怎么改提高准确率
要提高准确率,您可以尝试以下一些改进:
1. 增加卷积层和池化层的深度,可以尝试增加卷积层和池化层的数量,或者增加它们的深度,以增强模型的特征提取能力。
2. 调整卷积核的大小,卷积核的大小会影响模型的感受野,通过调整卷积核的大小,可以更好地捕捉特征。
3. 调整全连接层的大小,全连接层的大小会影响模型的复杂度和拟合能力,通过调整全连接层的大小,可以更好地平衡模型的复杂度和拟合能力。
4. 尝试使用不同的激活函数,例如LeakyReLU、ELU等,这些激活函数可以在一定程度上缓解梯度消失问题。
5. 调整学习率和优化器,这些超参数会影响模型的训练效果,可以通过调整它们来改善模型的性能。
6. 数据增强,通过对训练数据进行随机旋转、平移、缩放等操作,可以增加数据的多样性,提高模型的泛化能力。
请使用matlab代码将一下代码改为可以进行人脸识别的网络 layers = [ imageInputLayer([28 28 1],"Name","imageinput") convolution2dLayer([3 3],32,"Name","conv_2","Padding","same") reluLayer("Name","relu_2") maxPooling2dLayer([5 5],"Name","maxpool_2","Padding","same") convolution2dLayer([3 3],32,"Name","conv_3","Padding","same") reluLayer("Name","relu_3") maxPooling2dLayer([5 5],"Name","maxpool_3","Padding","same") convolution2dLayer([3 3],32,"Name","conv_1","Padding","same") reluLayer("Name","relu_1") maxPooling2dLayer([5 5],"Name","maxpool_1","Padding","same") fullyConnectedLayer(10,"Name","fc") softmaxLayer("Name","softmax") classificationLayer("Name","classoutput")];
要将该代码改为可以进行人脸识别的网络,需要进行以下几个步骤:
1. 更改输入层的大小为对应的人脸图像大小,一般为[224 224 3]。
2. 将卷积层和池化层的大小调整为适合处理人脸图像的大小。
3. 更改最后一个全连接层的输出大小,以适应人脸识别任务。
4. 在分类层之前添加人脸识别的特有层,如人脸对齐、人脸识别模型等。
下面是一个简单的示例代码:
layers = [
imageInputLayer([224 224 3],"Name","imageinput")
convolution2dLayer([3 3],32,"Name","conv_1","Padding","same")
reluLayer("Name","relu_1")
maxPooling2dLayer([2 2],"Name","maxpool_1","Padding","same")
convolution2dLayer([3 3],64,"Name","conv_2","Padding","same")
reluLayer("Name","relu_2")
maxPooling2dLayer([2 2],"Name","maxpool_2","Padding","same")
convolution2dLayer([3 3],128,"Name","conv_3","Padding","same")
reluLayer("Name","relu_3")
maxPooling2dLayer([2 2],"Name","maxpool_3","Padding","same")
fullyConnectedLayer(256,"Name","fc1")
reluLayer("Name","relu_fc1")
fullyConnectedLayer(128,"Name","fc2")
reluLayer("Name","relu_fc2")
fullyConnectedLayer(10,"Name","fc3")
softmaxLayer("Name","softmax")
classificationLayer("Name","classoutput")
];
注:以上代码仅为示例,具体实现还需根据实际需要进行调整。
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