public static DigitImage[] Read(DataSet dataset)
{
FileStream fileStream;
if (dataset == DataSet.Training)
{
fileStream = new FileStream(trainPath, FileMode.Open, FileAccess.Read);
}
else
{
fileStream = new FileStream(testPath, FileMode.Open, FileAccess.Read);
}
List <DigitImage> digitImageList = new List <DigitImage>();
using (var streamReader = new StreamReader(fileStream, Encoding.UTF8))
{
string line;
streamReader.ReadLine();
while ((line = streamReader.ReadLine()) != null)
{
string[] splitted = line.Split(',');
byte[][] pixels = new byte[28][];
for (int i = 0; i < pixels.Length; ++i)
{
pixels[i] = new byte[28];
}
for (int i = 0; i < splitted.Length - 1; ++i)
{
pixels[i / 28][i % 28] = (byte)int.Parse(splitted[i + 1]);
}
byte label = (dataset == DataSet.Training ? byte.Parse(splitted[0]) : (byte)10);
DigitImage d = new DigitImage(pixels, label);
digitImageList.Add(d);
}
}
return(digitImageList.ToArray());
}
public static DigitImage[] ReadFromFile(DataSet dataSet, int count = -1)
{
DigitImage[] digitImages = null;
string pathImages = "";
string pathLabels = "";
if (count != -1)
{
ImageCount = count;
digitImages = new DigitImage[ImageCount];
}
if (dataSet == DataSet.Training)
{
if (imageCount == -1)
{
digitImages = new DigitImage[MaxTrainingImageCount];
ImageCount = MaxTrainingImageCount;
}
pathImages = path_training_images;
pathLabels = path_training_labels;
}
else
{
if (imageCount == -1)
{
digitImages = new DigitImage[MaxTestingImageCount];
ImageCount = MaxTestingImageCount;
}
pathImages = path_test_images;
pathLabels = path_test_labels;
}
FileStream ifsLabels;
FileStream ifsImages;
try
{
//Console.WriteLine("\nBegin\n");
ifsLabels =
new FileStream(pathLabels,
FileMode.Open); // test labels
ifsImages =
new FileStream(pathImages,
FileMode.Open); // test images
BinaryReader brLabels =
new BinaryReader(ifsLabels);
BinaryReader brImages =
new BinaryReader(ifsImages);
int magic1 = brImages.ReadInt32(); // discard
int numImages = brImages.ReadInt32();
int numRows = brImages.ReadInt32();
int numCols = brImages.ReadInt32();
int magic2 = brLabels.ReadInt32();
int numLabels = brLabels.ReadInt32();
byte[][] pixels = new byte[28][];
for (int i = 0; i < pixels.Length; ++i)
{
pixels[i] = new byte[28];
}
// each test image
//there are 10 000 images so you have this limit
for (int di = 0; di < ImageCount; ++di)
{
//Console.Clear();
for (int i = 0; i < 28; ++i)
{
for (int j = 0; j < 28; ++j)
{
byte b = brImages.ReadByte();
pixels[i][j] = b;
}
}
byte lbl = brLabels.ReadByte();
DigitImage dImage =
new DigitImage(pixels, lbl);
digitImages[di] = dImage;
//Console.WriteLine(dImage.ToString());
//Console.ReadLine();
} // each image
ifsImages.Close();
brImages.Close();
ifsLabels.Close();
brLabels.Close();
//Console.WriteLine("\nEnd\n");
//Console.ReadLine();
return(digitImages);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
//Console.ReadLine();
}
return(null);
}
