/// <summary>
/// MNIST のラベルファイルをロードする.
/// 失敗した時は null を返す.
/// </summary>
/// <param name="path">ラベルファイルのパス.</param>
/// <returns></returns>
public static MnistLabelLoader Load(string path)
{
// ファイルが存在しない
if (File.Exists(path) == false)
{
return(null);
}
MnistLabelLoader loader = new MnistLabelLoader();
using (FileStream inStream = new FileStream(path, FileMode.Open, FileAccess.Read))
using (GZipStream decompStream = new GZipStream(inStream, CompressionMode.Decompress))
{
// バイト配列を分解する
BinaryReaderBE reader = new BinaryReaderBE(decompStream);
loader.magicNumber = reader.ReadInt32();
loader.numberOfItems = reader.ReadInt32();
loader.labelList = reader.ReadBytes(loader.numberOfItems);
reader.Close();
}
return(loader);
}
public MnistDataLoader()
{
string trainlabelPath = InternetFileDownloader.Donwload(DOWNLOAD_URL + TRAIN_LABEL, TRAIN_LABEL, TRAIN_LABEL_HASH);
MnistLabelLoader trainLabelLoader = MnistLabelLoader.Load(trainlabelPath);
this.TrainLabel = trainLabelLoader.labelList;
string trainimagePath = InternetFileDownloader.Donwload(DOWNLOAD_URL + TRAIN_IMAGE, TRAIN_IMAGE, TRAIN_IMAGE_HASH);
MnistImageLoader trainImageLoader = MnistImageLoader.Load(trainimagePath);
this.TrainData = trainImageLoader.bitmapList.ToArray();
string teachlabelPath = InternetFileDownloader.Donwload(DOWNLOAD_URL + TEACH_LABEL, TEACH_LABEL, TEACH_LABEL_HASH);
MnistLabelLoader teachLabelLoader = MnistLabelLoader.Load(teachlabelPath);
this.TeachLabel = teachLabelLoader.labelList;
string teachimagePath = InternetFileDownloader.Donwload(DOWNLOAD_URL + TEACH_IMAGE, TEACH_IMAGE, TEACH_IMAGE_HASH);
MnistImageLoader teachImageLoader = MnistImageLoader.Load(teachimagePath);
this.TeachData = teachImageLoader.bitmapList.ToArray();
}
