public void DrawTrack(IImageProcessingContext g, double sonogramFramesPerSecond, double sonogramFreqBinWidth, int sonogramHeight)
{
Pen p1 = new Pen(AcousticEvent.DefaultBorderColor, 2); // default colour
double secondsPerTrackFrame = 1 / this.framesPerSecond;
double startSec = this.timeOffset.TotalSeconds;
int frame1 = (int)Math.Round(startSec * sonogramFramesPerSecond);
for (int i = 1; i < this.track.Count - 1; i++)
{
double endSec = startSec + (i * secondsPerTrackFrame);
int frame2 = (int)Math.Round(endSec * sonogramFramesPerSecond);
//int freqBin = (int)Math.Round(this.MinFreq / freqBinWidth);
int f1 = this.GetFrequency(i);
int f1Bin = (int)Math.Round(f1 / sonogramFreqBinWidth);
int y1 = sonogramHeight - f1Bin - 1;
int f2 = this.GetFrequency(i + 1);
int f2Bin = (int)Math.Round(f2 / sonogramFreqBinWidth);
int y2 = sonogramHeight - f2Bin - 1;
g.DrawLine(p1, frame1, y1, frame2, y2);
//startSec = endSec;
frame1 = frame2;
}
//g.DrawText(this.Name, Drawing.Tahoma8, Color.Black, new PointF(t1, y - 1));
}
public void DrawFreqHits(IImageProcessingContext g)
{
int length = this.freqHits.Length;
Pen p1 = new Pen(Color.Red, 1);
for (int x = 0; x < length; x++)
{
if (this.freqHits[x] <= 0)
{
continue;
}
int y = (int)(this.SonogramImage.Height * (1 - (this.freqHits[x] / (double)this.nyquistFreq)));
//g.DrawRectangle(p1, x, y, x + 1, y + 1);
g.DrawLine(p1, x, y, x, y + 1);
// g.DrawTextSafe(e.Name, Drawing.Tahoma6, Color.Black, new PointF(x, y - 1));
}
}
} //OverlayRainbowTransparency()
/// <summary>
/// superimposes a matrix of scores on top of a sonogram. USES RAINBOW PALLETTE.
/// ASSUME MATRIX consists of integers >=0.
/// </summary>
private void OverlayDiscreteColorMatrix(IImageProcessingContext g)
{
int rows = this.SuperimposedDiscreteColorMatrix.GetLength(0);
int cols = this.SuperimposedDiscreteColorMatrix.GetLength(1);
MatrixTools.MinMax(this.SuperimposedDiscreteColorMatrix, out var min, out var max);
int palleteLength = ImageTools.DarkColors.Length;
//Color[] palette = { Color.Crimson, Color.Red, Color.Orange, Color.Yellow, Color.Lime, Color.Green, Color.Blue, Color.Indigo, Color.Violet, Color.Purple };
int imageHt = this.SonogramImage.Height - 1; //subtract 1 because indices start at zero
for (int r = 0; r < rows; r++)
{
//traverse columns - skip DC column
for (int c = 1; c < cols; c++)
{
int index = this.SuperimposedDiscreteColorMatrix[r, c];
if (index <= 0)
{
continue; //nothing to show
}
// Color pixel = bmp.GetPixel(r, imageHt - c);
// if (pixel.R > 250) continue; //by-pass white
// int index = (int)Math.Floor((value * 9));//get index into pallette
if (index >= palleteLength)
{
index = index % palleteLength;
}
var newColor = ImageTools.DarkColors[index];
//double factor = pixel.R / (double)(255 * 1.2); //1.2 is a color intensity adjustment
//int red = (int)Math.Floor(newColor.R + ((255 - newColor.R) * factor));
//int grn = (int)Math.Floor(newColor.G + ((255 - newColor.G) * factor));
//int blu = (int)Math.Floor(newColor.B + ((255 - newColor.B) * factor));
//g.DrawLine(new Pen(Color.FromRgb(red, grn, blu)), r, imageHt - c, r + 1, imageHt - c);
g.DrawLine(new Pen(newColor, 1), r, imageHt - c, r + 1, imageHt - c);
}
}
} //OverlayDiscreteColorMatrix()
/// <summary>
/// WARNING: THis method is yet to be debugged and tested following move to SixLabors drawing libraries.
/// superimposes a matrix of scores on top of a sonogram.
/// USES A PALLETTE of ten RAINBOW colours.
/// ASSUME MATRIX is NORMALIZED IN [0,1].
/// </summary>
public void OverlayRainbowTransparency(IImageProcessingContext g, Image <Rgb24> bmp)
{
Color[] palette = { Color.Crimson, Color.Red, Color.Orange, Color.Yellow, Color.Lime, Color.Green, Color.Blue, Color.Indigo, Color.Violet, Color.Purple };
int rows = this.SuperimposedRainbowTransparency.GetLength(0);
int cols = this.SuperimposedRainbowTransparency.GetLength(1);
int imageHt = this.SonogramImage.Height - 1; //subtract 1 because indices start at zero
for (int r = 0; r < rows; r++)
{
// traverse columns - skip DC column
for (int c = 1; c < cols; c++)
{
double value = this.SuperimposedRainbowTransparency[r, c];
if (value <= 0.0)
{
continue; //nothing to show
}
var pixel = bmp[r, imageHt - c];
if (pixel.R > 250)
{
continue; //by-pass white
}
int index = (int)Math.Floor(value * 9); // get index into pallette
if (index > 9)
{
index = 9;
}
var newColor = palette[index].ToPixel <Rgb24>();
double factor = pixel.R / (255 * 1.2); // 1.2 is a color intensity adjustment
var red = (byte)Math.Floor(newColor.R + ((255 - newColor.R) * factor));
var grn = (byte)Math.Floor(newColor.G + ((255 - newColor.G) * factor));
var blu = (byte)Math.Floor(newColor.B + ((255 - newColor.B) * factor));
g.DrawLine(new Pen(Color.FromRgb(red, grn, blu), 1), r, imageHt - c, r + 1, imageHt - c);
c++; //every second column
}
}
} //OverlayRainbowTransparency()