private static double Learn(ImageBatch imb, LabelBatch lab, int x, Net net)
{
int correctNum = 0;
double costSum = 0;
for (int i = x * MINIBATCH_SIZE; i < x * MINIBATCH_SIZE + MINIBATCH_SIZE; i++)
{
formChanger.ChangeImage(imb[i].GetBitmap(), lab[i] + " (" + (i + 1) + "/" + imb.Count() + ")");
net.LoadSource(imb[i], lab[i]); //载入样本
var isCorrect = net.BeginReason(out var say); //正推
var cost = net.Evaluation(); //计算cost
costSum += cost;
formChanger.AddNeuronNote(net, lab[i], say, cost);
net.Recall();//反向传播
if (isCorrect)
{
correctNum++;
}
PrintInForm(isCorrect, say, cost);
}
var averageCost = costSum / MINIBATCH_SIZE;
formChanger.AddCost(averageCost, Convert.ToDouble(correctNum) / MINIBATCH_SIZE);
net.Update(0.1, Net.UpdateOptimizer.SGD);
ResultWriter.WriteResult(net);
PrintInConsole(averageCost, correctNum);
return(averageCost);
}
public HttpResponseMessage CreateBatch(ImageBatch imageBatch)
{
// Our response object
ImageBatchResponse batchResult = new ImageBatchResponse();
// Validate the api key
ValidateApi validateApi = new ValidateApi();
Validation validateApiKey = validateApi.ValidateApiKey(imageBatch.ApiKey);
// Api key is invalid.
if (!validateApiKey.IsValid)
{
return(BuildErrorResponse(validateApiKey));
}
// Loop through the values
List <ImageResponse> imageList = new List <ImageResponse>();
foreach (ImageDetails detail in imageBatch.ImageDetails)
{
// Validate the values first
ValidateInput validation = new ValidateInput();
Validation validationInput = validation.ValidateBarcodeValue(detail.Type, detail.Value);
// Result is Valid
ImageResponse imageResponse = new ImageResponse();
if (validationInput.IsValid)
{
imageResponse.ImageUrl = string.Format(
"http://www.codegenerate.me/Code/Barcode?type={0}&value={1}", detail.Type, detail.Value);
imageResponse.Result = "Success";
batchResult.SuccessfulCount++;
}
else
{
imageResponse.Result = validationInput.ErrorMessage;
}
imageList.Add(imageResponse);
}
// Add the images
batchResult.Images = imageList.ToArray();
// Build the object to return
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(batchResult.ToJSON())
};
return(result);
}
private static void BeginLearning(int startPos)
{
var imageBatch = new ImageBatch(DataReader.ReadTrainImage());
var labelBatch = new LabelBatch(DataReader.ReadTrainLabel());
var net = ResultWriter.ReadResult();
//net.InitMomentumLists();
for (int x = startPos / MINIBATCH_SIZE; x < (60000 / MINIBATCH_SIZE); x++)
{
ResultWriter.WriteLog("start:" + x * MINIBATCH_SIZE + " to " + (x * MINIBATCH_SIZE + MINIBATCH_SIZE) + "\n");
for (; ;)
{
var averageCost = Learn(imageBatch, labelBatch, x, net);//学习minibatch的一份
if (averageCost < 0.01)
{
ResultWriter.WriteLog("cost:" + averageCost + "\n");
break;
}
}
}
}
public HttpResponseMessage CreateBatch(ImageBatch imageBatch)
{
// Our response object
ImageBatchResponse batchResult = new ImageBatchResponse();
// Validate the api key
ValidateApi validateApi = new ValidateApi();
Validation validateApiKey = validateApi.ValidateApiKey(imageBatch.ApiKey);
// Api key is invalid.
if (!validateApiKey.IsValid)
{
return BuildErrorResponse(validateApiKey);
}
// Loop through the values
List<ImageResponse> imageList = new List<ImageResponse>();
foreach (ImageDetails detail in imageBatch.ImageDetails)
{
// Validate the values first
ValidateInput validation = new ValidateInput();
Validation validationInput = validation.ValidateBarcodeValue(detail.Type, detail.Value);
// Result is Valid
ImageResponse imageResponse = new ImageResponse();
if (validationInput.IsValid)
{
imageResponse.ImageUrl = string.Format(
"http://www.codegenerate.me/Code/Barcode?type={0}&value={1}", detail.Type, detail.Value);
imageResponse.Result = "Success";
batchResult.SuccessfulCount++;
}
else
{
imageResponse.Result = validationInput.ErrorMessage;
}
imageList.Add(imageResponse);
}
// Add the images
batchResult.Images = imageList.ToArray();
// Build the object to return
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK)
{Content = new StringContent(batchResult.ToJSON())};
return result;
}