public static CanvasEdgeVO CreateEdgesFromCanvas(CanvasPixel canvasPixel)
{
CanvasEdgeVO result = new CanvasEdgeVO(canvasPixel.Width, canvasPixel.Height);
EdgePoint[] dest = result.Data;
Pixel[] source = canvasPixel.Data;
Pixel[] matrix = new Pixel[9];
for (int y = 0; y < canvasPixel.Height; y++)
{
for (int x = 0; x < canvasPixel.Width; x++)
{
int index = y * canvasPixel.Width + x;
matrix[0] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, -1, -1, index);
matrix[1] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, 0, -1, index);
matrix[2] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, 1, -1, index);
matrix[3] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, -1, 0, index);
matrix[4] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, 0, 0, index);
matrix[5] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, 1, 0, index);
matrix[6] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, -1, 1, index);
matrix[7] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, 0, 1, index);
matrix[8] = CreateEdgesFromCanvas_GetPixel(canvasPixel, x, y, 1, 1, index);
(GradientDirection direction, int intensity)gResult = DirectionGradientBO.Detect(matrix);
dest[index] = new EdgePoint(gResult.direction, gResult.intensity);
}
}
return(result);
}
public static void EdgeReducer(CanvasEdgeVO dataCE, int threshold)
{
CanvasEdgeVO tmpCE = new CanvasEdgeVO(dataCE.Width, dataCE.Height);
tmpCE.Clear();
for (int y = 0; y < dataCE.Height; y++)
{
int diff = 0;
for (int x = 0; x < dataCE.Width; x++)
{
int index = y * dataCE.Width + x;
EdgePoint oneEdge = dataCE.Data[index];
if (oneEdge.Direction == GradientDirection.vertical || oneEdge.Direction == GradientDirection.askewRaise)
{
diff += oneEdge.Intensity;
if (diff > threshold)
{
oneEdge.Intensity = diff;
tmpCE.Data[index] = oneEdge;
diff = 0;
}
}
}
}
for (int x = 0; x < dataCE.Width; x++)
{
int diff = 0;
for (int y = 0; y < dataCE.Height; y++)
{
int index = y * dataCE.Width + x;
EdgePoint oneEdge = dataCE.Data[index];
if (oneEdge.Direction == GradientDirection.horizontal || oneEdge.Direction == GradientDirection.askewFall)
{
diff += oneEdge.Intensity;
if (diff > threshold)
{
if (tmpCE.Data[index].Intensity < diff)
{
oneEdge.Intensity = diff;
tmpCE.Data[index] = oneEdge;
}
diff = 0;
}
}
}
}
// prepiseme vysledek
Array.Copy(tmpCE.Data, dataCE.Data, tmpCE.Data.Length);
}
