public static Bitmap toContrast2(Bitmap _b)
{
Bitmap temp = copy(_b);
XHistogram his = new XHistogram(_b);
his.scaleHistogram(255);
int[][] LUT; // look up table
LUT = new int[3][];
for (int i = 0; i < LUT.Length; i++) // isi dengan 0
{
LUT[i] = new int[256];
for (int j = 0; j < LUT[i].Length; j++)
{
LUT[i][j] = 0;
}
}
int rmin = 255;
int rmax = 0;
int gmin = 255;
int gmax = 0;
int bmin = 255;
int bmax = 0;
for (int i = 0; i < his.data2[0].Length; i++) // menentukan r g b max & min dari histo incremental
{
rmin = (his.data2[0][i] <= rmin) ? his.data2[0][i] : rmin;
rmax = (his.data2[0][i] >= rmax) ? his.data2[0][i] : rmax;
gmin = (his.data2[1][i] <= gmin) ? his.data2[1][i] : gmin;
gmax = (his.data2[1][i] >= gmax) ? his.data2[1][i] : gmax;
bmin = (his.data2[2][i] <= bmin) ? his.data2[2][i] : bmin;
bmax = (his.data2[2][i] >= bmax) ? his.data2[2][i] : bmax;
}
for (int j = 0; j < LUT[0].Length; j++) // bikin LUT
{
LUT[0][j] = 255 * (his.data2[0][j] - rmin) / (rmax - rmin);
LUT[1][j] = 255 * (his.data2[1][j] - gmin) / (gmax - gmin);
LUT[2][j] = 255 * (his.data2[2][j] - bmin) / (bmax - bmin);
}
for (int i = 0; i < _b.Width; i++) // Apply LUT ke gambar
{
for (int j = 0; j < _b.Height; j++)
{
Color ct = temp.GetPixel(i, j);
int rt = LUT[0][ct.R];
int gt = LUT[1][ct.G];
int bt = LUT[2][ct.B];
temp.SetPixel(i, j, Color.FromArgb(rt, gt, bt));
}
}
return(temp);
}
public static Bitmap toContrast2(Bitmap _b)
{
Bitmap temp = copy(_b);
XHistogram his = new XHistogram(_b);
his.scaleHistogram(255);
int[][] LUT; // look up table
LUT = new int[3][];
for (int i = 0; i < LUT.Length; i++) { // isi dengan 0
LUT[i] = new int[256];
for (int j = 0; j < LUT[i].Length; j++) {
LUT[i][j] = 0;
}
}
int rmin = 255;
int rmax = 0;
int gmin = 255;
int gmax = 0;
int bmin = 255;
int bmax = 0;
for (int i = 0; i < his.data2[0].Length; i++) { // menentukan r g b max & min dari histo incremental
rmin = (his.data2[0][i] <= rmin) ? his.data2[0][i] : rmin;
rmax = (his.data2[0][i] >= rmax) ? his.data2[0][i] : rmax;
gmin = (his.data2[1][i] <= gmin) ? his.data2[1][i] : gmin;
gmax = (his.data2[1][i] >= gmax) ? his.data2[1][i] : gmax;
bmin = (his.data2[2][i] <= bmin) ? his.data2[2][i] : bmin;
bmax = (his.data2[2][i] >= bmax) ? his.data2[2][i] : bmax;
}
for (int j = 0; j < LUT[0].Length; j++) { // bikin LUT
LUT[0][j] = 255 * (his.data2[0][j] - rmin) / (rmax - rmin);
LUT[1][j] = 255 * (his.data2[1][j] - gmin) / (gmax - gmin);
LUT[2][j] = 255 * (his.data2[2][j] - bmin) / (bmax - bmin);
}
for (int i = 0; i < _b.Width; i++) { // Apply LUT ke gambar
for (int j = 0; j < _b.Height; j++) {
Color ct = temp.GetPixel(i, j);
int rt = LUT[0][ct.R];
int gt = LUT[1][ct.G];
int bt = LUT[2][ct.B];
temp.SetPixel(i, j, Color.FromArgb(rt, gt, bt));
}
}
return temp;
}
