/// <summary>
/// Recomputes image histogram and draws the result in the given raster image.
/// </summary>
/// <param name="input">Input image.</param>
/// <param name="param">Textual parameter.</param>
public static void ComputeHistogram(Bitmap input, ImageHistogramHsvMode mode, int hue = OptimalHue)
{
// 1. Histogram recomputation.
double[] occ = new double[hue];
int width = input.Width;
int height = input.Height;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
Color col = input.GetPixel(x, y);
double H, S, V;
Arith.ColorToHSV(col, out H, out S, out V);
int h = (int)Math.Round(H * (hue - 1) / 360.0);
if (mode == ImageHistogramHsvMode.Distribution)
{
occ[h]++;
}
else if (mode == ImageHistogramHsvMode.Vals)
{
occ[h] += V;
}
else if (mode == ImageHistogramHsvMode.Power)
{
occ[h] += V * S;
}
//histArray[mode == 0 ? col.R : (mode == 1 ? col.G : (mode == 2 ? col.B : Y))]++;
}
}
double Sum = occ.Sum();
histArray = new double[hue];
for (int i = 0; i < hue; i++)
{
histArray[i] = occ[i] / Sum;
}
}
public static void ComputeHistogram(Bitmap input, string param)
{
param = param.Trim();
bool ColorPalete = (param[0] == ColorPaleteCommnad); //ColorPalete
bool Histogram = (param[0] == HistogramCommnad); //Histogram
bool Values = (param[0] == ValuesCommnad); //Values
bool Powers = (param[0] == PowersCommnad); //Powers
bool total = ColorPalete || Histogram || Values || Powers;
bool onlyOne = BoolMath.OnlyOne(ColorPalete, Histogram, Values, Powers);
if (!total)
{
MessageBox.Show("Missing starting command");
mode = ImageHistogramHsvMode.None;
return;
}
if (!onlyOne)
{
MessageBox.Show("To many commands");
mode = ImageHistogramHsvMode.None;
return;
}
if (ColorPalete)
{
mode = ImageHistogramHsvMode.Standart;
param = param.Substring(param.IndexOf(ColorPaleteCommnad) + 1);
Dictionary <string, string> rec = Util.ParseKeyValueList(param, ' ');
int hue = ImageHistogramHsvExist.OptimalHue;
int saturation = ImageHistogramHsvExist.OptimalSaturation;
Util.TryParse(rec, "Hue", ref hue);
RangeMath.InRangeOrDefault(ref hue, ImageHistogramHsvExist.MinHue, ImageHistogramHsvExist.MaxHue, ImageHistogramHsvExist.OptimalHue);
Util.TryParse(rec, "Sat", ref saturation);
RangeMath.InRangeOrDefault(ref saturation, ImageHistogramHsvExist.MinSaturation, ImageHistogramHsvExist.MaxSaturation, ImageHistogramHsvExist.OptimalSaturation);
if (rec.ContainsKey("Colors") && rec["Colors"] == "Dynamic")
{
ImageHistogramHsvExist.DynamicColors = true;
}
else if (rec.ContainsKey("Colors") && rec["Colors"] == "Discrete")
{
ImageHistogramHsvExist.DynamicColors = false;
}
else
{
ImageHistogramHsvExist.DynamicColors = true;
}
ImageHistogramHsvExist.ComputeHistogram(input, hue, saturation + 1);
}
else if (Histogram || Powers || Values)
{
if (Histogram)
{
mode = ImageHistogramHsvMode.Distribution;
param = param.Substring(param.IndexOf(HistogramCommnad) + 1);
}
if (Values)
{
mode = ImageHistogramHsvMode.Vals;
param = param.Substring(param.IndexOf(ValuesCommnad) + 1);
}
if (Powers)
{
mode = ImageHistogramHsvMode.Power;
param = param.Substring(param.IndexOf(PowersCommnad) + 1);
}
Dictionary <string, string> rec = Util.ParseKeyValueList(param, ' ');
int hue = ImageHistogramHsvOcc.OptimalHue;
float zoom = ImageHistogramHsvOcc.OptimalZoom;
Util.TryParse(rec, "Hue", ref hue);
RangeMath.InRangeOrDefault(ref hue, ImageHistogramHsvOcc.MinHue, ImageHistogramHsvOcc.MaxHue, ImageHistogramHsvOcc.OptimalHue);
if (!Util.TryParse(rec, "Zoom", ref zoom) && rec.ContainsKey("Zoom") && (rec["Zoom"] == "A" || rec["Zoom"] == "Auto"))
{
ImageHistogramHsvOcc.AutoZoom = true;
}
else
{
ImageHistogramHsvOcc.AutoZoom = false;
}
ImageHistogramHsvOcc.Zoom = zoom;
ImageHistogramHsvOcc.ComputeHistogram(input, mode, hue + 1);
}
}
