public void CorrectlyPoolToMultiple()
{
// Input:
// 0 1 2 3 4
// 5 6 7 8 9
// 10 11 12 13 14
// 15 16 17 18 19
// 20 21 22 23 24
//
// Filter:
// 0,1,5,6 1,2,6,7 2,3,7,8 3,4,8,9
// 5,6,10,11 6,7,11,12 7,8,12,13 8,9,13,14
// 10,11,15,16 11,12,16,17 12,13,17,18 13,14,18,19
// 15,16,20,21 16,17,21,22 17,18,22,23 18,19,23,24
//
// Pooling:
// Node[0]: max(0,1,5,6; 1,2,6,7; 5,6,10,11; 6,7,11,12)
// Node[1]: max(2,3,7,8; 3,4,8,9; 7,8,12,13; 8,9,13,14)
// Node[2]: max(10,11,15,16; 11,12,16,17; 15,16,20,21; 16,17,21,22
// Node[3]: max(12,13,17,18; 13,14,18,19; 17,18,22,23; 18,19,23,24)
var input = new Layer2D((5, 5), Array.Empty <Layer>(), ActivationFunctionType.RELU, InitialisationFunctionType.GlorotUniform);
var filter = new Filter2D(new[] { input }, (2, 2), ActivationFunctionType.RELU, InitialisationFunctionType.GlorotUniform);
filter.AddPooling((2, 2));
Assert.Equal(4, filter.Nodes.Count);
// assert inputs to nodes are as expected (index + occurences)
var node0 = Assert.IsType <PooledNode>(filter.Nodes[0]);
var node0inputs = node0.UnderlyingNodes
.Aggregate(new List <Node>(), (current, next) => current.Concat(next.Weights.Keys).ToList())
.GroupBy(n => n)
.ToDictionary(n => n.Key);
foreach (var n in new[] {
public void TrainFilterToFeatureSortOfWell()
{
var inputLayer = new Layer2D((3, 3), Array.Empty <Layer>(), ActivationFunctionType.RELU, InitialisationFunctionType.None);
var filter1 = new Filter2D(new[] { inputLayer }, (2, 2), ActivationFunctionType.RELU, InitialisationFunctionType.GlorotUniform);
var filter2 = new Filter2D(new[] { inputLayer }, (2, 2), ActivationFunctionType.RELU, InitialisationFunctionType.GlorotUniform);
var filter3 = new Filter2D(new[] { inputLayer }, (2, 2), ActivationFunctionType.RELU, InitialisationFunctionType.GlorotUniform);
var output = new Layer(1, new Layer[] { filter1, filter2, filter3 }, ActivationFunctionType.Sigmoid, InitialisationFunctionType.HeEtAl);
output.AddMomentumRecursively();
output.Initialise(new Random());
// feature is horizontal line
var inputMatch1 = new double[] { 1, 1, 1, 0, 0, 0, 0, 0, 0 };
var inputMatch2 = new double[] { 0, 0, 0, 1, 1, 1, 0, 0, 0 };
var inputMatch3 = new double[] { 0, 0, 0, 0, 0, 0, 1, 1, 1 };
// vertical lines
var inputNoMatch1 = new double[] { 1, 0, 0, 1, 0, 0, 1, 0, 0 };
var inputNoMatch2 = new double[] { 0, 1, 0, 0, 1, 0, 0, 1, 0 };
var inputNoMatch3 = new double[] { 0, 0, 1, 0, 0, 1, 0, 0, 1 };
for (var i = 0; i < 10000; i++)
{
output.Backpropagate(inputMatch1, new double[] { 1 }, ErrorFunctionType.CrossEntropy, 0.01, 0.9);
output.Backpropagate(inputMatch2, new double[] { 1 }, ErrorFunctionType.CrossEntropy, 0.01, 0.9);
output.Backpropagate(inputMatch3, new double[] { 1 }, ErrorFunctionType.CrossEntropy, 0.01, 0.9);
output.Backpropagate(inputNoMatch1, new double[] { 0 }, ErrorFunctionType.CrossEntropy, 0.01, 0.9);
output.Backpropagate(inputNoMatch2, new double[] { 0 }, ErrorFunctionType.CrossEntropy, 0.01, 0.9);
output.Backpropagate(inputNoMatch3, new double[] { 0 }, ErrorFunctionType.CrossEntropy, 0.01, 0.9);
}
output.CalculateOutputs(inputMatch2);
output.CalculateOutputs(inputMatch1);
Assert.True(output.Nodes[0].Output > 0.95);
output.CalculateOutputs(inputMatch2);
Assert.True(output.Nodes[0].Output > 0.95);
output.CalculateOutputs(inputMatch3);
Assert.True(output.Nodes[0].Output > 0.95);
output.CalculateOutputs(inputNoMatch1);
Assert.True(output.Nodes[0].Output < 0.05);
output.CalculateOutputs(inputNoMatch2);
Assert.True(output.Nodes[0].Output < 0.05);
output.CalculateOutputs(inputNoMatch3);
Assert.True(output.Nodes[0].Output < 0.05);
}
public void CorrectlyPoolToSingle()
{
// Input:
// 0 1 2
// 3 4 5
// 6 7 8
//
// Filter:
// 0,1,3,4 1,2,4,5
// 3,4,6,7 4,5,7,8
//
// Pooling:
// max(0,1,3,4; 1,2,4,5; 3,4,6,7; 4,5,7,8)
var input = new Layer2D((3, 3), Array.Empty <Layer>(), ActivationFunctionType.RELU, InitialisationFunctionType.GlorotUniform);
var filter = new Filter2D(new[] { input }, (2, 2), ActivationFunctionType.RELU, InitialisationFunctionType.GlorotUniform);
filter.AddPooling((2, 2));
var node = Assert.Single(filter.Nodes);
var pooledNode = Assert.IsType <PooledNode>(node);
Assert.Equal(4, pooledNode.UnderlyingNodes.Count);
}
private void addSinogramFilterBtn_Click(object sender, RoutedEventArgs e)
{
Filter2D selectedFilter = (Filter2D)sinogramFilter.SelectedItem;
sinogramFilterList.Items.Add(selectedFilter);
}
private void addResultFilterBtn_Click(object sender, RoutedEventArgs e)
{
Filter2D selectedFilter = (Filter2D)resultFilter.SelectedItem;
resultFilterList.Items.Add(selectedFilter);
}
public static void AddPooling(this Filter2D filter, (int height, int width) poolingDimensions)
