//反相
private System.Drawing.Bitmap NegativeImage(System.Drawing.Bitmap bitmap)
{
int height = bitmap.Height;
int width = bitmap.Width;
System.Drawing.Bitmap newBitmap = new System.Drawing.Bitmap(width, height);
pointBitmap pointBitMap = new pointBitmap(bitmap);
pointBitmap newPointBitMap = new pointBitmap(newBitmap);
pointBitMap.LockBits();
newPointBitMap.LockBits();
System.Drawing.Color pixel;
for (int i = 1; i < width; i++)
{
for (int j = 1; j < height; j++)
{
int RGB_R, RGB_G, RGB_B;
pixel = pointBitMap.GetPixel(i, j);
RGB_R = 255 - pixel.R;
RGB_G = 255 - pixel.G;
RGB_B = 255 - pixel.B;
newPointBitMap.SetPixel(i, j, System.Drawing.Color.FromArgb(RGB_R, RGB_G, RGB_B));
}
}
pointBitMap.UnlockBits();
newPointBitMap.UnlockBits();
return(newBitmap);
}
//灰度图
private System.Drawing.Bitmap BlackImage(System.Drawing.Bitmap bitmap)
{
int height = bitmap.Height;
int width = bitmap.Width;
System.Drawing.Bitmap newBitmap = new System.Drawing.Bitmap(width, height);
pointBitmap pointBitMap = new pointBitmap(bitmap);
pointBitmap newPointBitMap = new pointBitmap(newBitmap);
pointBitMap.LockBits();
newPointBitMap.LockBits();
System.Drawing.Color pixel;
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
pixel = pointBitMap.GetPixel(i, j);
int RGB_R, RGB_G, RGB_B, Result = 0;
RGB_R = pixel.R;
RGB_G = pixel.G;
RGB_B = pixel.B;
switch (2)
{
case 0: //平均值法
Result = ((RGB_R + RGB_G + RGB_B) / 3);
break;
case 1: //最大值法
Result = RGB_R > RGB_G ? RGB_R : RGB_G;
Result = Result > RGB_B ? Result : RGB_B;
break;
case 2: //加权平均值法
Result = ((int)(0.3 * RGB_R) + (int)(0.59 * RGB_G) + (int)(0.11 * RGB_B));
break;
}
newPointBitMap.SetPixel(i, j, System.Drawing.Color.FromArgb(Result, Result, Result));
}
}
pointBitMap.UnlockBits();
newPointBitMap.UnlockBits();
return(newBitmap);
}
//IHS色彩空间转RGB色彩空间
private System.Drawing.Bitmap RGBImage(System.Drawing.Bitmap bitmap, IHS[] imageIHS)
{
int height = bitmap.Height;
int width = bitmap.Width;
IHS[] newIHS = imageIHS;
System.Drawing.Bitmap newBitmap = new System.Drawing.Bitmap(width, height);
pointBitmap pointBitMap = new pointBitmap(bitmap);
pointBitmap newPointBitMap = new pointBitmap(newBitmap);
pointBitMap.LockBits();
newPointBitMap.LockBits();
System.Drawing.Color pixel;
double round = 180 / Math.PI;
for (int i = 1; i < width; i++)
{
for (int j = 1; j < height; j++)
{
pixel = pointBitMap.GetPixel(i, j);
double RGB_R = 0;
double RGB_G = 0;
double RGB_B = 0;
//////////////////////////////////////////////////////////////
double I = newIHS[i * height + j].I;
double H = newIHS[i * height + j].H * 360;
double S = newIHS[i * height + j].S;
if (H <= 120 && H >= 0)
{
RGB_R = I * (1 + S * Math.Cos(H / round) / Math.Cos((60 - H) / round));
RGB_B = I * (1 - S);
RGB_G = 3 * I - RGB_R - RGB_B;
}
else if (H <= 240 && H >= 120)
{
RGB_G = I * (1 + S * Math.Cos((H - 120) / round) / Math.Cos((180 - H) / round));
RGB_R = I * (1 - S);
RGB_B = 3 * I - RGB_G - RGB_R;
}
else
{
RGB_B = I * (1 + S * Math.Cos((H - 240) / round) / Math.Cos((300 - H) / round));
RGB_G = I * (1 - S);
RGB_R = 3 * I - RGB_B - RGB_G;
}
//if (RGB_R > 1)
//{
// RGB_R = 1;
//}
//if (RGB_R < 0)
//{
// RGB_R = 0;
//}
//if (RGB_G > 1)
//{
// RGB_G = 1;
//}
//if (RGB_G < 0)
//{
// RGB_G = 0;
//}
//if (RGB_B > 1)
//{
// RGB_B = 1;
//}
//if (RGB_B < 0)
//{
// RGB_B = 0;
//}
//////////////////////////////////////////////////////////////
//if (imageIHS[i * height + j].S == 0)
//{
// RGB_R = RGB_G = RGB_B = imageIHS[i * height + j].I;
//}
//else
//{
// double sectorPos = imageIHS[i * height + j].H / 60.0;
// int sectorNumber = (int)(Math.Floor(sectorPos));
// double fractionalSector = sectorPos - sectorNumber;
// double p = imageIHS[i * height + j].I * (1.0 - imageIHS[i * height + j].S);
// double q = imageIHS[i * height + j].I * (1.0 - (imageIHS[i * height + j].S * fractionalSector));
// double t = imageIHS[i * height + j].I * (1.0 - (imageIHS[i * height + j].S * (1 - fractionalSector)));
// switch (sectorNumber)
// {
// case 0:
// RGB_R = imageIHS[i * height + j].I;
// RGB_G = t;
// RGB_B = p;
// break;
// case 1:
// RGB_R = q;
// RGB_G = imageIHS[i * height + j].I;
// RGB_B = p;
// break;
// case 2:
// RGB_R = p;
// RGB_G = imageIHS[i * height + j].I;
// RGB_B = t;
// break;
// case 3:
// RGB_R = p;
// RGB_G = q;
// RGB_B = imageIHS[i * height + j].I;
// break;
// case 4:
// RGB_R = t;
// RGB_G = p;
// RGB_B = imageIHS[i * height + j].I;
// break;
// case 5:
// RGB_R = imageIHS[i * height + j].I;
// RGB_G = p;
// RGB_B = q;
// break;
// }
//}
//////////////////////////////////////////////////////////////
if (double.IsNaN(RGB_R))
{
RGB_R = 0;
}
if (double.IsNaN(RGB_G))
{
RGB_G = 0;
}
if (double.IsNaN(RGB_B))
{
RGB_B = 0;
}
RGB_R *= 255;
RGB_G *= 255;
RGB_B *= 255;
int R = Convert.ToInt16(RGB_R);
int G = Convert.ToInt16(RGB_G);
int B = Convert.ToInt16(RGB_B);
R = R > 255 ? 255 : R;
R = R < 0 ? 0 : R;
G = G > 255 ? 255 : G;
G = G < 0 ? 0 : G;
B = B > 255 ? 255 : B;
B = B < 0 ? 0 : B;
newPointBitMap.SetPixel(i, j, System.Drawing.Color.FromArgb(R, G, B));
}
}
pointBitMap.UnlockBits();
newPointBitMap.UnlockBits();
return(newBitmap);
}
//RGB色彩空间转IHS色彩空间
private IHS[] IHSImage(System.Drawing.Bitmap bitmap)
{
int height = bitmap.Height;
int width = bitmap.Width;
IHS[] imageIHS = new IHS[height * width];
System.Drawing.Bitmap newBitmap = new System.Drawing.Bitmap(width, height);
pointBitmap pointBitMap = new pointBitmap(bitmap);
pointBitmap newPointBitMap = new pointBitmap(newBitmap);
pointBitMap.LockBits();
newPointBitMap.LockBits();
System.Drawing.Color pixel;
double theta;
double round = 180 / Math.PI;
for (int i = 1; i < width; i++)
{
for (int j = 1; j < height; j++)
{
pixel = pointBitMap.GetPixel(i, j);
double RGB_R = (pixel.R / 255.0);
double RGB_G = (pixel.G / 255.0);
double RGB_B = (pixel.B / 255.0);
double Max = Math.Max(RGB_R, Math.Max(RGB_G, RGB_B));
double Min = Math.Min(RGB_R, Math.Min(RGB_G, RGB_B));
//////////////////////////////////////////////////////////
imageIHS[i * height + j].I = (RGB_R + RGB_G + RGB_B) / 3;
if (RGB_R == RGB_G && RGB_R == RGB_B)
{
theta = 0;
}
else
{
theta = Math.Acos((((RGB_R - RGB_G) + (RGB_R - RGB_B)) / 2) / Math.Sqrt((RGB_R - RGB_G) * (RGB_R - RGB_G) + (RGB_R - RGB_B) * (RGB_G - RGB_B))) * round;
}
if (RGB_B <= RGB_G)
{
imageIHS[i * height + j].H = theta / 360;
}
else
{
imageIHS[i * height + j].H = 1 - theta / 360;
}
imageIHS[i * height + j].S = 1 - 3 * Min / (RGB_R + RGB_G + RGB_B);
//////////////////////////////////////////////////////////
//imageIHS[10 * i + j].H = 0.0;
//if (Max == RGB_R && RGB_G >= RGB_B)
//{
// if (Max - Min == 0) imageIHS[10 * i + j].H = 0.0;
// else imageIHS[10 * i + j].H = 60 * (RGB_G - RGB_B) / (Max - Min);
//}
//else if (Max == RGB_R && RGB_G < RGB_B)
//{
// imageIHS[10 * i + j].H = 60 * (RGB_G - RGB_B) / (Max - Min) + 360;
//}
//else if (Max == RGB_G)
//{
// imageIHS[10 * i + j].H = 60 * (RGB_B - RGB_R) / (Max - Min) + 120;
//}
//else if (Max == RGB_B)
//{
// imageIHS[10 * i + j].H = 60 * (RGB_R - RGB_G) / (Max - Min) + 240;
//}
//imageIHS[10 * i + j].S = (Max == 0) ? 0.0 : (1.0 - ((double)Min / (double)Max));
//imageIHS[10 * i + j].I = Max;
//////////////////////////////////////////////////////////
}
}
pointBitMap.UnlockBits();
newPointBitMap.UnlockBits();
return(imageIHS);
}
//柔化
private System.Drawing.Bitmap SoftenImage(System.Drawing.Bitmap bitmap)
{
int height = bitmap.Height;
int width = bitmap.Width;
System.Drawing.Bitmap newBitmap = new System.Drawing.Bitmap(width, height);
pointBitmap pointBitMap = new pointBitmap(bitmap);
pointBitmap newPointBitMap = new pointBitmap(newBitmap);
pointBitMap.LockBits();
newPointBitMap.LockBits();
System.Drawing.Color pixel;
int[] template;
int ratio;
//高斯算子
int[] Gauss = { 1, 2, 1, 2, 4, 2, 1, 2, 1 };
int ratioGauss = 16;
//均值算子1
int[] Average1 = { 9, 9, 9, 9, 9, 9, 9, 9, 9 };
int ratioAverage1 = 9;
//均值算子2
int[] Average2 = { 8, 8, 8, 8, 0, 8, 8, 8, 8 };
int ratioAverage2 = 8;
switch (0)
{
case 0: //高斯算子
template = Gauss;
ratio = ratioGauss;
break;
case 1: //均值算子1
template = Average1;
ratio = ratioAverage1;
break;
case 2: //均值算子2
template = Average2;
ratio = ratioAverage2;
break;
}
for (int i = 1; i < width - 1; i++)
{
for (int j = 1; j < height - 1; j++)
{
int RGB_R = 0, RGB_G = 0, RGB_B = 0;
int Index = 0;
for (int column = -1; column <= 1; column++)
{
for (int row = -1; row <= 1; row++)
{
pixel = pointBitMap.GetPixel(i + row, j + column);
RGB_R += pixel.R * template[Index];
RGB_G += pixel.G * template[Index];
RGB_B += pixel.B * template[Index];
Index++;
}
}
RGB_R /= ratio;
RGB_G /= ratio;
RGB_B /= ratio;
//处理颜色值溢出
RGB_R = RGB_R > 255 ? 255 : RGB_R;
RGB_R = RGB_R < 0 ? 0 : RGB_R;
RGB_G = RGB_G > 255 ? 255 : RGB_G;
RGB_G = RGB_G < 0 ? 0 : RGB_G;
RGB_B = RGB_B > 255 ? 255 : RGB_B;
RGB_B = RGB_B < 0 ? 0 : RGB_B;
newPointBitMap.SetPixel(i - 1, j - 1, System.Drawing.Color.FromArgb(RGB_R, RGB_G, RGB_B));
}
}
pointBitMap.UnlockBits();
newPointBitMap.UnlockBits();
return(newBitmap);
}
//边缘提取
private System.Drawing.Bitmap SharpenImage(System.Drawing.Bitmap bitmap)
{
int height = bitmap.Height;
int width = bitmap.Width;
System.Drawing.Bitmap newBitmap = new System.Drawing.Bitmap(width, height);
pointBitmap pointBitMap = new pointBitmap(bitmap);
pointBitmap newPointBitMap = new pointBitmap(newBitmap);
pointBitMap.LockBits();
newPointBitMap.LockBits();
System.Drawing.Color pixel;
int[] template;
//Laplace算子
int[] Laplacian1 = { -1, -1, -1, -1, 9, -1, -1, -1, -1 };
int[] Laplacian2 = { 0, 1, 0, 1, -4, 1, 0, 1, 0 };
//Prewitt算子
int[] Prewitt1 = { -1, -1, -1, 0, 0, 0, 1, 1, 1 };
int[] Prewitt2 = { -1, 0, 1, -1, 0, 1, -1, 0, 1 };
//Soble算子
int[] Soble1 = { 1, 2, 1, 0, 0, 0, -1, -2, -1 };
int[] Soble2 = { -1, 0, 1, -2, 0, 2, -1, 0, 1 };
//边缘提取
int[] Soble3 = { 0, 1, 0, 1, -4, 1, 0, 1, 0 };
switch (6)
{
case 0: //Laplace1算子
template = Laplacian1;
break;
case 1: //Laplace2算子
template = Laplacian2;
break;
case 2: //Prewitt1算子
template = Prewitt1;
break;
case 3: //Prewitt2算子
template = Prewitt1;
break;
case 4: //Soble1算子
template = Prewitt1;
break;
case 5: //Soble2算子
template = Prewitt1;
break;
case 6: //Soble3算子
template = Prewitt1;
break;
}
for (int i = 1; i < width - 1; i++)
{
for (int j = 1; j < height - 1; j++)
{
int RGB_R = 0, RGB_G = 0, RGB_B = 0;
int Index = 0;
for (int column = -1; column <= 1; column++)
{
for (int row = -1; row <= 1; row++)
{
pixel = pointBitMap.GetPixel(i + row, j + column);
RGB_R += pixel.R * template[Index];
RGB_G += pixel.G * template[Index];
RGB_B += pixel.B * template[Index];
Index++;
}
}
//处理颜色值溢出
RGB_R = RGB_R > 255 ? 255 : RGB_R;
RGB_R = RGB_R < 0 ? 0 : RGB_R;
RGB_G = RGB_G > 255 ? 255 : RGB_G;
RGB_G = RGB_G < 0 ? 0 : RGB_G;
RGB_B = RGB_B > 255 ? 255 : RGB_B;
RGB_B = RGB_B < 0 ? 0 : RGB_B;
newPointBitMap.SetPixel(i - 1, j - 1, System.Drawing.Color.FromArgb(RGB_R, RGB_G, RGB_B));
}
}
pointBitMap.UnlockBits();
newPointBitMap.UnlockBits();
return(newBitmap);
}
//**功能**/**//////////////////////////////////////////////////////////////////////
//灰度值拉伸
private System.Drawing.Bitmap GrayStretchImage(System.Drawing.Bitmap bitmap)
{
int height = bitmap.Height;
int width = bitmap.Width;
MinGrayValues = 255;
MaxGrayValues = 0;
double slope = 1.0;
System.Drawing.Bitmap newBitmap = new System.Drawing.Bitmap(width, height);
pointBitmap pointBitMap = new pointBitmap(bitmap);
pointBitmap newPointBitMap = new pointBitmap(newBitmap);
pointBitMap.LockBits();
newPointBitMap.LockBits();
System.Drawing.Color pixel;
for (int i = 1; i < width - 1; i++)
{
for (int j = 1; j < height - 1; j++)
{
pixel = pointBitMap.GetPixel(i, j);
if (MinGrayValues > pixel.R)
{
MinGrayValues = pixel.R;
}
if (MinGrayValues > pixel.G)
{
MinGrayValues = pixel.G;
}
if (MinGrayValues > pixel.B)
{
MinGrayValues = pixel.B;
}
if (MaxGrayValues < pixel.R)
{
MaxGrayValues = pixel.R;
}
if (MaxGrayValues < pixel.G)
{
MaxGrayValues = pixel.G;
}
if (MaxGrayValues < pixel.B)
{
MaxGrayValues = pixel.B;
}
}
}
GrayWindow GrayWindow = new GrayWindow();
GrayWindow.ShowDialog();
this.Cursor = Cursors.Wait;
if (MaxNewValues != MaxGrayValues || MinNewValues != MinGrayValues)
{
slope = Convert.ToDouble((MaxNewValues - MinNewValues)) / Convert.ToDouble((MaxGrayValues - MinGrayValues));
for (int i = 1; i < width - 1; i++)
{
for (int j = 1; j < height - 1; j++)
{
int RGB_R = 0, RGB_G = 0, RGB_B = 0;
pixel = pointBitMap.GetPixel(i, j);
RGB_R = Convert.ToInt16(slope * (pixel.R - MinGrayValues) + MinNewValues);
RGB_G = Convert.ToInt16(slope * (pixel.G - MinGrayValues) + MinNewValues);
RGB_B = Convert.ToInt16(slope * (pixel.B - MinGrayValues) + MinNewValues);
newPointBitMap.SetPixel(i - 1, j - 1, System.Drawing.Color.FromArgb(RGB_R, RGB_G, RGB_B));
}
}
pointBitMap.UnlockBits();
newPointBitMap.UnlockBits();
return(newBitmap);
}
else
{
pointBitMap.UnlockBits();
newPointBitMap.UnlockBits();
return(bitmap);
}
}
