private static void PixelProcessor(int x, int y, ImageProcessingThreadContext context)
{/*
* var sourceColor = context.Original[x, y];
* var chroma = sourceColor.CalculateChromaticity();
* const float treshold = 0.1f;
* var BackColor = Color.White;
* var targetColor = chroma < treshold
* ? sourceColor.Lerp(BackColor, (treshold - chroma) / (1 - treshold))
* : BackColor;
* context.Result[x, y] = targetColor;*/
var sourceColor = context.Original[x, y];
var chroma = sourceColor.CalculateChromaticity();
if (x == 0 || y == 0 || x == context.Original.Width - 1 || y == context.Original.Height - 1)
{
context.Result[x, y] = Color.FromArgb(0, Color.Black);
return;
}
var br = (byte)(sourceColor.GetBrightness() * 255);
if (chroma <= CHROMATICITY_MIN)
{
context.Result[x, y] = Color.FromArgb(255 - br, br, br, br);
return;
}
var k = 1.0f;
if (chroma < CHROMATICITY_MAX)
{
k = (CHROMATICITY_MAX - chroma) / (CHROMATICITY_MAX - CHROMATICITY_MIN);
}
context.Result[x, y] = Color.FromArgb(255 - br, br, br, br).Lerp(Color.FromArgb(0, BackColor), k);
}
public static void main(int x, int y, ImageProcessingThreadContext context)
{
var sourceColor = context.Original[x, y];
var chroma = sourceColor.CalculateChromaticity();
if (x == 0 || y == 0 || x == context.Original.Width - 1 || y == context.Original.Height - 1)
{
context.Result[x, y] = Color.FromArgb(0, Color.Black);
return;
}
if (chroma <= CHROMATICITY_MIN)
{
var br = (float)sourceColor.GetBrightness();
var cbr = (byte)(br * 255);
context.Result[x, y] = Color.FromArgb(cbr, cbr, cbr);
return;
}
var k = 1.0f;
if (chroma < CHROMATICITY_MAX)
{
k = (CHROMATICITY_MAX - chroma) / (CHROMATICITY_MAX - CHROMATICITY_MIN);
}
var nb = new Color[3, 3];
var nbc = new float[3, 3];
var nbb = new float[3, 3];
var cx = 0.0f; var cy = 0.0f;
var bx = 0.0f; var by = 0.0f;
for (var dx = -1; dx <= 1; ++dx)
{
for (var dy = -1; dy <= 1; ++dy)
{
if (dx == 0 && dy == 0)
{
continue;
}
var clr = nb[dx + 1, dy + 1] = context.Original[x + dx, y + dy];
var chr = nbc[dx + 1, dy + 1] = clr.CalculateChromaticity();
var brs = nbb[dx + 1, dy + 1] = clr.GetBrightness();
var len = (float)System.Math.Sqrt(dx * dx + dy * dy);
cx += dx * chr / len;
cy += dy * chr / len;
bx += dx * brs / len;
by += dy * brs / len;
}
}
cx /= 3;
cy /= 3;
bx /= 3;
by /= 3;
var t = ((1 - nbc[0, 1]) * nbb[0, 1] + (1 - nbc[2, 1]) * nbb[2, 1] + (1 - nbc[1, 0]) * nbb[1, 0] +
(1 - nbc[1, 2]) * nbb[1, 2]);
var A = (byte)(t * (cx * bx + cy * by) * 255);
context.Result[x, y] = Color.FromArgb(A, A, A, A);
//context.Result[x, y] = Color.FromArgb((byte)((cx + 1) / 2), (byte)((cy + 1) / 2), (byte)((bx + 1) / 2), (byte)((by + 1) / 2));
//context.Result[x, y] = context.Original[x + (int)cx, y + (int)cy].Lerp(BackColor, k);
/*
* cx = (256 + cx * 255 ) / 2;
* cy = (256 + cy * 255 ) / 2;
* context.Result[x, y] = Color.FromArgb(255, (byte)cx, (byte)cy, (int)(chroma * 255));*/
}
