public byte[] HeatmapToByteArray(HeatmapArray ha)
{
// Scaled intensity: on interval (0,1)
double[,] intensity = ha.GetScaledIntensity();
// Writing bytes (flattening 2d array)
byte[] bytes = new byte[Len];
int pixNo; // pixel number
for (int y = 0; y < Height; y++)
{
for (int x = 0; x < Width; x++)
{
pixNo = y * Width + x;
// blue, green, red are 0; greyscale
// bytes[4 * i] = 255; // R
bytes[4 * pixNo + 1] = 255; // G
// bytes[4 * i + 2] = 255; // B
bytes[4 * pixNo + 3] = (byte)(254 * intensity[x, y]); // alpha (0=transparent, 255 =opaque)
}
}
return(bytes);
}
// Overlays heatmap onto source image
public void Overlay(BitmapSource source, HeatmapArray heatmap)
{
// Bottom layer (background image) as byte array
byte[] bottom = BmpToByteArray(source);
// Top layer (heatmap) as byte array
byte[] top = HeatmapToByteArray(heatmap);
// Blending
byte[] rawImage = Blend(bottom, top);
// Storing result
Result = BitmapSource.Create(Width, Height, 96d, 96d, Pf, null, rawImage, Stride);
}
// Heatmap converted to bitmap
public BitmapSource HeatmapToBitmap(HeatmapArray heatmap)
{
// Creating bitmap
return(BitmapSource.Create(Width, Height, 96d, 96d, Pf, null, HeatmapToByteArray(heatmap), Stride));
}
