/// <summary>
/// MNIST のデータをロードする.
/// 失敗した時は null を返す.
/// </summary>
/// <param name="path">画像データのパス.</param>
/// <returns></returns>
public static MNistImageLoader Load(string path)
{
// ファイルが存在しない
if (File.Exists(path) == false)
{
return(null);
}
// バイト配列を分解する
FileStream stream = new FileStream(path, FileMode.Open);
BinaryReaderBE reader = new BinaryReaderBE(stream);
MNistImageLoader loader = new MNistImageLoader();
loader.magicNumber = reader.ReadInt32();
loader.numberOfImages = reader.ReadInt32();
loader.numberOfRows = reader.ReadInt32();
loader.numberOfColumns = reader.ReadInt32();
int pixelCount = loader.numberOfRows * loader.numberOfColumns;
for (int i = 0; i < loader.numberOfImages; i++)
{
byte[] pixels = reader.ReadBytes(pixelCount);
loader.bitmapList.Add(pixels);
}
reader.Close();
return(loader);
}
public static MNistLabelLoader Load(string path)
{
if (File.Exists(path) == false)
{
return(null);
}
FileStream stream = new FileStream(path, FileMode.Open);
BinaryReaderBE reader = new BinaryReaderBE(stream);
MNistLabelLoader loader = new MNistLabelLoader();
loader.magicNumber = reader.ReadInt32();
loader.numberOfItems = reader.ReadInt32();
loader.labelList = reader.ReadBytes(loader.numberOfItems);
reader.Close();
return(loader);
}