public double MstPrim(List <RgbPixel> distinctColors)
{
int u = 0, curntNode = 0;
var mstCost = 0d;
_key[0] = 0;
_parent[0] = -1;
for (int i = 0; i < _VertixSize; i++)
{
_visted[u] = true;
int miniCost = Int32.MaxValue;
for (int j = 0; j < _VertixSize; j++)
{
if (_visted[j] == false)
{
var cost = RgbPixel.EuclideanDistance(distinctColors[u], distinctColors[j]);
if (cost < _key[j])
{
_parent[j] = u;
_key[j] = cost;
}
if (_key[j] < miniCost)
{
curntNode = j;
miniCost = _key[j];
}
}
}
u = curntNode;
mstCost += miniCost;
}
return(Math.Round(mstCost, 1));
}
public double MstPrim(List <RgbPixel> distinctColors) // Θ(V^2)
{
var mstCost = 0d; // Θ(1)
int startNode = 0, nextNode = 0; // Θ(1)
_key[0] = 0; // Θ(1)
_parent[0] = 0; // Θ(1)
for (var i = 0; i < _VertixSize - 1; i++) // Θ(v * body)
{
_visted[startNode] = true; // Θ(1)
double miniCost = Int32.MaxValue; // Θ(1)
for (var j = 0; j < _VertixSize; j++) // Θ(v * body)
{
if (_visted[j] == false) // Θ(1)
{
var cost = RgbPixel.EuclideanDistance(distinctColors[startNode], distinctColors[j]); // Θ(1)
if (cost < _key[j]) // Θ(1)
{
_parent[j] = startNode; // Θ(1)
_key[j] = cost; // Θ(1)
}
if (_key[j] < miniCost) // Θ(1)
{
nextNode = j; // Θ(1)
miniCost = _key[j]; // Θ(1)
}
}
}
startNode = nextNode; // Θ(1)
mstCost += _key[startNode]; // Θ(1)
edges.Add(new Edge(startNode, _parent[startNode], _key[startNode])); // Θ(1)
}
return(Math.Round(mstCost, 2)); // Θ(1)
}
public static double EuclideanDistance(RgbPixel p1, RgbPixel p2)
{
int redDistance = p1.red - p2.red;
int greenDistance = p1.green - p2.green;
int blueDistance = p1.blue - p2.blue;
double squareDistance = redDistance * redDistance + greenDistance * greenDistance + blueDistance * blueDistance;
return(Math.Sqrt(squareDistance));
}
private List <RgbPixel> CountDistinctColors()
{
var uniqColors = new SortedSet <int>();
var uColors = new List <RgbPixel>();
foreach (var pixel in ImageMatrix)
{
var color = RgbPixel.ConvertToRgbPixel(pixel).RGBToInt();
uniqColors.Add(color);
}
foreach (var uniqColor in uniqColors)
{
var color = RgbPixel.IntToRGB(uniqColor);
uColors.Add(color);
}
return(uColors);
}
public static RgbPixel ConvertToRgbPixel(RGBPixel pixel)
{
RgbPixel p = new RgbPixel(pixel.red, pixel.green, pixel.blue);
return(p);
}