public IONodeConvolutionParallel(Point2D inputDim, IONode filter, Point2D stepSize)
: base(inputDim, new Point2D(filter.output.Width * inputDim.X / stepSize.X, filter.output.Height * inputDim.Y / stepSize.Y))
{
this.filter = filter;
this.stepSize = stepSize;
//if (this.filter.input.Width % 2 == 0||this.filter.input.Height % 2 == 0)
//{
// throw new ArgumentException("Filter input cannot be even.");
//}
}
public void pushLayer(IONode n)
{
if (layers.Count != 0 && layers.Last().output.Size != n.input.Size)
{
throw new Exception("The input size of the layer you are trying to push is not consistent with the output of the previous layer.");
}
layers.Add(n);
if (layers.Count == 1)
{
Resize(n.input.Size, n.output.Size); //resize both input and output
}
else
{
Resize(input.Size, n.output.Size); //resize only the output
}
}
/// <summary>
/// Move a sliding window and apply the filter by using its BottomUp() method.
/// </summary>
protected override void bottomUp()
{
System.Collections.Concurrent.ConcurrentStack <IONode> filterClones = new ConcurrentStack <IONode>();
int stepsWidth = (int)(input.Width / stepSize.X);
int stepsHeight = (int)(input.Height / stepSize.Y);
int totalIterations = stepsWidth * stepsHeight;
for (int i = 0; i < totalIterations; i++)
{
IONode clone = ObjectCopier.Clone(filter);
filterClones.Push(clone);
}
System.Collections.Concurrent.ConcurrentStack <IONode> filterClonesUsed = new ConcurrentStack <IONode>();
//We pass all components of the input signal
Parallel.For(0, stepsWidth, stepX =>
{
int xI = stepX * (int)stepSize.X;
Parallel.For(0, stepsHeight, stepY =>
{
int yI = stepY * (int)stepSize.Y;
//Clone the filter
IONode clone;
while (!filterClones.TryPop(out clone))
{
;
}
//We construct the filter input based on its dimensions
for (int xF = 0; xF < clone.input.Width; xF++)
{
for (int yF = 0; yF < clone.input.Height; yF++)
{
int x = xI - clone.input.Width / 2 + xF;
int y = yI - clone.input.Height / 2 + yF;
x = Math.Min(input.Width - 1, Math.Max(x, 0));
y = Math.Min(input.Height - 1, Math.Max(y, 0));
clone.input.reality[xF, yF] = input.reality[x, y];
}
}
//We apply the clone
clone.BottomUp();
//We copy the result of the clone to the output
for (int xF = 0; xF < clone.output.Width; xF++)
{
for (int yF = 0; yF < clone.output.Height; yF++)
{
output.prediction[(int)(xI / stepSize.X) * clone.output.Width + xF, (int)(yI / stepSize.Y) * clone.output.Height + yF] = clone.output.prediction[xF, yF];
}
}
filterClonesUsed.Push(clone);
});
});
if (filter is IONodeAdaptive)
{
IEnumerable <IONodeAdaptive> casted = filterClonesUsed.Cast <IONodeAdaptive>();
(filter as IONodeAdaptive).fuse(casted);
}
}