//Shuffles the Dataset (used to have random data samples)
public static void Shuffle(List <MNISTReader.DigitImage> list)
{
Random rng = new Random();
int n = list.Count;
while (n > 1)
{
n--;
int k = rng.Next(n + 1);
MNISTReader.DigitImage value = list[k];
list[k] = list[n];
list[n] = value;
}
}
//MNIST to vector converter
public static Vector ConvertImageToVector(MNISTReader.DigitImage image)
{
Vector doublevector = new Vector(28 * 28);
int count = 0;
for (int i = 0; i < 28; i++)
{
for (int j = 0; j < 28; j++)
{
if (image.pixels[i][j] != 0)
{
doublevector.data[count] = image.pixels[i][j] / 256.0;
}
count++;
}
}
return(doublevector);
}
public static int Active(Image <Gray, byte> digitImage)
{
byte[][] imageData = new byte[digitImage.Width][];
for (var i = 0; i < digitImage.Width; i++)
{
imageData[i] = new byte[digitImage.Height];
for (var j = 0; j < digitImage.Height; j++)
{
imageData[i][j] = digitImage.Data[j, i, 0];
}
}
var image = new MNISTReader.DigitImage(imageData, (byte)0);
Vector doublevector = ConvertImageToVector(image);
brain.SetInitialActivation(doublevector);
brain.FeedForward();
return(brain.GetResult());
}
