public PgmImg ReduceColors(PgmImg pgm)
{
var temp = pgm.Clone();
for (int i = 0; i < pgm.Width; i++)
{
for (int j = 0; j < pgm.Height; j++)
{
temp[i, j] = Reduce(pgm[i, j], pgm.ReduceTo);
}
}
/*
* // outra forma - mais lenta
* var newColorArray = new int[pgm.ReduceTo];
* for (int i = 0; i < pgm.ReduceTo ; i++)
* newColorArray[i] = i * (255 / (pgm.ReduceTo-1));
*
* for (int i = 0; i < matrix.GetLength(0); i++)
* for (int j = 0; j < matrix.GetLength(1); j++)
* temp[i, j] = (byte)Closest((int)matrix[i, j], newColorArray);
*/
return(temp);
}
public PgmImg Expansion(PgmImg img)
{
var ret = img.Clone();
var EstruturanteNormal = CriaMatrizEstruturante(img);
// espelha estrutura
var Estruturante = (double[, ])EstruturanteNormal.Clone();
var n = img.ReduceTo;
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
Estruturante[i, j] = EstruturanteNormal[n - i - 1, n - j - 1];
}
}
for (int i = 0; i < img.Width; i++)
{
for (int j = 0; j < img.Height; j++)
{
windowMorpho(1, img, ret, Estruturante, i, j);
}
}
return(ret);
}
public PgmImg Equalize(PgmImg pgm)
{
var Acumulativo = pgm.CumulativePallete();
var min = Acumulativo.Min();
var max = Acumulativo[255];
var ret = pgm.Clone();
for (int i = 0; i < pgm.Width; i++)
{
for (int j = 0; j < pgm.Height; j++)
{
ret[i, j] = (byte)(
(
(double)
(Acumulativo[pgm[i, j]] - min) /
(max - min)
)
* 255);
}
}
return(ret);
}
public PgmImg Erosion(PgmImg img)
{
var ret = img.Clone();
var Estruturante = CriaMatrizEstruturante(img);
for (int i = 0; i < img.Width; i++)
for (int j = 0; j < img.Height; j++)
windowMorpho(0, img, ret, Estruturante, i, j);
return ret;
}
public PgmImg MirrorY(PgmImg pgm)
{
var temp = pgm.Clone();
for (int i = 0; i < pgm.Width; i++)
{
for (int j = 0; j < pgm.Height; j++)
{
temp[i, j] = pgm[i, pgm.Height - 1 - j];
}
}
return(temp);
}
public PgmImg Erosion(PgmImg img)
{
var ret = img.Clone();
var Estruturante = CriaMatrizEstruturante(img);
for (int i = 0; i < img.Width; i++)
{
for (int j = 0; j < img.Height; j++)
{
windowMorpho(0, img, ret, Estruturante, i, j);
}
}
return(ret);
}
public PgmImg Expansion(PgmImg img)
{
var ret = img.Clone();
var EstruturanteNormal = CriaMatrizEstruturante(img);
// espelha estrutura
var Estruturante = (double[,])EstruturanteNormal.Clone();
var n = img.ReduceTo;
for (int i = 0; i < n; i++)
for (int j = 0; j < n; j++)
Estruturante[i, j] = EstruturanteNormal[n-i-1,n-j-1];
for (int i = 0; i < img.Width; i++)
for (int j = 0; j < img.Height; j++)
windowMorpho(1, img, ret, Estruturante, i, j);
return ret;
}
public PgmImg Equalize(PgmImg pgm)
{
var Acumulativo = pgm.CumulativePallete();
var min = Acumulativo.Min();
var max = Acumulativo[255];
var ret = pgm.Clone();
for (int i = 0; i < pgm.Width; i++)
for (int j = 0; j < pgm.Height; j++)
ret[i, j] = (byte) (
(
(double)
(Acumulativo[pgm[i, j]] - min) /
(max - min)
)
*255);
return ret;
}
public PgmImg FloydSteinberg(PgmImg pgm)
{
var temp = pgm.Clone();
var width = temp.Width - 1;
var height = temp.Height - 1;
for (int i = 0; i < temp.Width; i++)
{
for (int j = 0; j < temp.Height; j++)
{
var original = temp[i, j];
temp[i, j] = Reduce(temp[i, j], pgm.ReduceTo);
var error = (double)original - (double)temp[i, j];
if (j < height)
{
temp[i, j + 1] = Normalize(temp[i + 0, j + 1] + error * MagicNumbers.Right);
}
if (i < width)
{
temp[i + 1, j] = Normalize(temp[i + 1, j + 0] + error * MagicNumbers.Down);
}
if (j < height && i < width)
{
temp[i + 1, j + 1] = Normalize(temp[i + 1, j + 1] + error * MagicNumbers.DownRight);
}
if (j > 0 && i < width)
{
temp[i + 1, j - 1] = Normalize(temp[i + 1, j - 1] + error * MagicNumbers.DownLeft);
}
}
}
return(temp);
}
private void addHistory()
{
Redo = new Stack <PgmImg>();
Undo.Push(bitmap.Clone());
}
public PgmImg FloydSteinberg(PgmImg pgm)
{
var temp = pgm.Clone();
var width = temp.Width-1;
var height = temp.Height-1;
for (int i = 0; i < temp.Width; i++)
for (int j = 0; j < temp.Height; j++)
{
var original = temp[i, j];
temp[i, j] = Reduce(temp[i, j], pgm.ReduceTo);
var error = (double)original - (double)temp[i, j];
if (j < height)
temp[i, j + 1] = Normalize(temp[i + 0, j + 1] + error * MagicNumbers.Right);
if (i < width)
temp[i + 1, j ] = Normalize(temp[i + 1, j + 0] + error * MagicNumbers.Down);
if (j < height && i < width)
temp[i + 1, j + 1] = Normalize(temp[i + 1, j + 1] + error * MagicNumbers.DownRight);
if (j > 0 && i < width)
temp[i + 1, j - 1] = Normalize(temp[i + 1, j - 1] + error * MagicNumbers.DownLeft);
}
return temp;
}
public PgmImg ReduceColors(PgmImg pgm)
{
var temp = pgm.Clone();
for (int i = 0; i < pgm.Width; i++)
for (int j = 0; j < pgm.Height; j++)
temp[i, j] = Reduce(pgm[i, j], pgm.ReduceTo);
/*
// outra forma - mais lenta
var newColorArray = new int[pgm.ReduceTo];
for (int i = 0; i < pgm.ReduceTo ; i++)
newColorArray[i] = i * (255 / (pgm.ReduceTo-1));
for (int i = 0; i < matrix.GetLength(0); i++)
for (int j = 0; j < matrix.GetLength(1); j++)
temp[i, j] = (byte)Closest((int)matrix[i, j], newColorArray);
*/
return temp;
}
public PgmImg MirrorY(PgmImg pgm)
{
var temp = pgm.Clone();
for (int i = 0; i < pgm.Width; i++)
for (int j = 0; j < pgm.Height; j++)
temp[i, j] = pgm[i, pgm.Height - 1 - j];
return temp;
}
