public RgbImage ToRgbImage()
{
var res = new RgbImage(PixelWidth, PixelHeight);
ForEach((pixel, position) => res[position] = pixel.ToRgb());
return(res);
}
public RgbImage PixelParallelMap(PixelPositionPipelineDelegate process)
{
var res = new RgbImage(PixelWidth, PixelHeight);
PixelParallelForEach((pixel, position) => res[position] = process(pixel, position));
return(res);
}
private RgbImage ScaleWithBilinearInterpolation(double kx, double ky)
{
var res = new RgbImage((PixelWidth * kx).Round(), (PixelHeight * ky).Round());
for (int x = 0; x < PixelWidth - 1; x++)
{
for (int y = 0; y < PixelHeight - 1; y++)
{
int nx1 = (kx * x).Round(), ny1 = (ky * y).Round();
int nx2 = (kx * (x + 1)).Round(), ny2 = (ky * (y + 1)).Round();
RgbPixel p11 = this[x, y].Value,
p12 = this[x, y + 1].Value,
p21 = this[x + 1, y].Value,
p22 = this[x + 1, y + 1].Value;
for (int nx = nx1; nx <= nx2; nx++)
{
for (int ny = ny1; ny <= ny2; ny++)
{
double k = (nx2 - nx1) * (ny2 - ny1);
double m1 = nx2 - nx, m2 = nx - nx1;
double n1 = ny2 - ny, n2 = ny - ny1;
res[nx, ny] = m2 * n2 / k * p11 + m1 * n2 / k * p21 + m2 * n1 / k * p12 + m1 * n1 / k * p22;
}
}
}
}
return(res);
}
public RgbImage Transform(int newWidth, int newHeight, TransformDelegate transform)
{
var res = new RgbImage(newWidth, newHeight);
for (int y = 0; y < PixelHeight; y++)
{
for (int x = 0; x < PixelWidth; x++)
{
var newPos = transform(new Point(x, y));
if (newPos.X < 0 || newPos.X >= newWidth)
{
continue;
}
if (newPos.Y < 0 || newPos.Y >= newHeight)
{
continue;
}
res[newPos] = this[x, y];
}
}
return(res);
}
private void NearestNeighborInterpolation(RgbImage origin, double kx, double ky)
{
for (int x = 0; x < PixelWidth; x++)
{
for (int y = 0; y < PixelHeight; y++)
{
if (this[x, y] != null)
{
continue;
}
int x0 = (int)Math.Round(x / kx);
if (x0 < 0 || x0 >= origin.PixelWidth)
{
continue;
}
int y0 = (int)Math.Round(y / ky);
if (y0 < 0 || y0 >= origin.PixelHeight)
{
continue;
}
this[x, y] = origin[x0, y0];
}
}
}