标签：class blog code ext color com
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public
static class ImageProcess{ /// <summary> /// 图片旋转 /// </summary> /// <param name="image"></param> /// <param name="angle">旋转角度</param> /// <returns></returns> public
static Image Rotation(Image image,float
angle) { angle = 360 - angle % 360; //弧度转换 double
radian = angle * Math.PI / 180.0; double
cos = Math.Cos(radian); double
sin = Math.Sin(radian); //原图的宽和高 int
w = image.Width; int
h = image.Height; int
W = (int)(Math.Max(Math.Abs(w * cos - h * sin), Math.Abs(w * cos + h * sin))); int
H = (int)(Math.Max(Math.Abs(w * sin - h * cos), Math.Abs(w * sin + h * cos))); //目标位图 Bitmap dsImage = new
Bitmap(W, H); System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(dsImage); g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bilinear; g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; //计算偏移量 Point Offset = new
Point((W - w) / 2, (H - h) / 2); //构造图像显示区域：让图像的中心与窗口的中心点一致 Rectangle rect = new
Rectangle(Offset.X, Offset.Y, w, h); Point center = new
Point(rect.X + rect.Width / 2, rect.Y + rect.Height / 2); g.TranslateTransform(center.X, center.Y); g.RotateTransform(360 - angle); //恢复图像在水平和垂直方向的平移 g.TranslateTransform(-center.X, -center.Y); g.DrawImage(image, rect); //重至绘图的所有变换 g.ResetTransform(); g.Save(); g.Dispose(); return
dsImage; } /// <summary> /// 图片翻转 /// </summary> /// <param name="image"></param> /// <param name="type">1水平，2垂直，3水平垂直</param> /// <returns></returns> public
static Image Turn(Image image,int
type) { if
(type == 1) { image.RotateFlip(RotateFlipType.RotateNoneFlipX); } else
if (type == 2) { image.RotateFlip(RotateFlipType.RotateNoneFlipY); } else
if (type == 3) { image.RotateFlip(RotateFlipType.RotateNoneFlipXY); } return
image; } /// <summary> /// 底片效果 /// </summary> /// <param name="image"></param> /// <returns></returns> public
static Image Film(Image image) { try { int
height = image.Height; int
width = image.Width; Bitmap newbitmap = new
Bitmap(width, height); Bitmap oldbitmap = (Bitmap)image; Color pixel; for
(int
x = 1; x < width; x++) { for
(int
y = 1; y < height; y++) { int
r, g, b; pixel = oldbitmap.GetPixel(x, y); r = 255 - pixel.R; g = 255 - pixel.G; b = 255 - pixel.B; newbitmap.SetPixel(x, y, Color.FromArgb(r, g, b)); } } return
newbitmap; } catch { return
null; } } /// <summary> /// 浮雕效果 /// </summary> /// <param name="image"></param> /// <returns></returns> public
static Image Relief(Image image) { try { int
height = image.Height; int
width = image.Width; Bitmap newbitmap = new
Bitmap(width, height); Bitmap oldbitmap = (Bitmap)image; Color pixel1, pixel2; for
(int
x = 0; x < width - 1; x++) { for
(int
y = 0; y < height - 1; y++) { int
r, g, b; pixel1 = oldbitmap.GetPixel(x, y); pixel2 = oldbitmap.GetPixel(x + 1, y + 1); r = Math.Abs(pixel1.R - pixel2.R + 128); g = Math.Abs(pixel1.G - pixel2.G + 128); b = Math.Abs(pixel1.B - pixel2.B + 128); if
(r > 255) r = 255; if
(r < 0) r = 0; if
(g > 255) g = 255; if
(g < 0) g = 0; if
(b > 255) b = 255; if
(b < 0) b = 0; newbitmap.SetPixel(x, y, Color.FromArgb(r, g, b)); } } return
newbitmap; } catch { return
null; } } /// <summary> /// 黑白效果 /// </summary> /// <param name="image"></param> /// <returns></returns> public
static Image BlackAndWhite(Image image) { try { int
height = image.Height; int
width = image.Width; Bitmap newbitmap = new
Bitmap(width, height); Bitmap oldbitmap = (Bitmap)image; Color pixel; for
(int
x = 0; x < width; x++) for
(int
y = 0; y < height; y++) { pixel = oldbitmap.GetPixel(x, y); int
r, g, b, Result = 0; r = pixel.R; g = pixel.G; b = pixel.B; //实例程序以加权平均值法产生黑白图像 int
iType = 2; switch
(iType) { case
0://平均值法 Result = ((r + g + b) / 3); break; case
1://最大值法 Result = r > g ? r : g; Result = Result > b ? Result : b; break; case
2://加权平均值法 Result = ((int)(0.7 * r) + (int)(0.2 * g) + (int)(0.1 * b)); break; } newbitmap.SetPixel(x, y, Color.FromArgb(Result, Result, Result)); } return
newbitmap; } catch { return
null; } } /// <summary> /// 柔化效果 /// </summary> /// <param name="image"></param> /// <returns></returns> public
static Image Soften(Image image) { try { int
height = image.Height; int
width = image.Width; Bitmap newbitmap = new
Bitmap(width, height); Bitmap oldbitmap = (Bitmap)image; Color pixel; //高斯模板 int[] Gauss = { 1, 2, 1, 2, 4, 2, 1, 2, 1 }; for
(int
x = 1; x < width - 1; x++) { for
(int
y = 1; y < height - 1; y++) { int
r = 0, g = 0, b = 0; int
Index = 0; for
(int
col = -1; col <= 1; col++) for
(int
row = -1; row <= 1; row++) { pixel = oldbitmap.GetPixel(x + row, y + col); r += pixel.R * Gauss[Index]; g += pixel.G * Gauss[Index]; b += pixel.B * Gauss[Index]; Index++; } r /= 16; g /= 16; b /= 16; //处理颜色值溢出 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; newbitmap.SetPixel(x - 1, y - 1, Color.FromArgb(r, g, b)); } } return
newbitmap; } catch { return
null; } } /// <summary> /// 锐化效果 /// </summary> /// <param name="image"></param> /// <returns></returns> public
static Image Sharpen(Image image) { try { int
height = image.Height; int
width = image.Width; Bitmap newbitmap = new
Bitmap(width, height); Bitmap oldbitmap = (Bitmap)image; Color pixel; //拉普拉斯模板 int[] Laplacian = { -1, -1, -1, -1, 9, -1, -1, -1, -1 }; for
(int
x = 1; x < width - 1; x++) { for
(int
y = 1; y < height - 1; y++) { int
r = 0, g = 0, b = 0; int
Index = 0; for
(int
col = -1; col <= 1; col++) for
(int
row = -1; row <= 1; row++) { pixel = oldbitmap.GetPixel(x + row, y + col); r += pixel.R * Laplacian[Index]; g += pixel.G * Laplacian[Index]; b += pixel.B * Laplacian[Index]; Index++; } //处理颜色值溢出 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; newbitmap.SetPixel(x - 1, y - 1, Color.FromArgb(r, g, b)); } } return
newbitmap; } catch { return
null; } } /// <summary> /// 雾化效果 /// </summary> /// <param name="image"></param> /// <returns></returns> public
static Image Atomization(Image image) { try { int
height = image.Height; int
width = image.Width; Bitmap newbitmap = new
Bitmap(width, height); Bitmap oldbitmap = (Bitmap)image; Color pixel; for
(int
x = 1; x < width - 1; x++) { for
(int
y = 1; y < height - 1; y++) { System.Random MyRandom = new
Random(); int
k = MyRandom.Next(123456); //像素块大小 int
dx = x + k % 9; int
dy = y + k % 9; if
(dx >= width) dx = width - 1; if
(dy >= height) dy = height - 1; pixel = oldbitmap.GetPixel(dx, dy); newbitmap.SetPixel(x, y, pixel); } } return
newbitmap; } catch { return
null; } } /// <summary> /// 图片明暗调整 /// </summary> /// <param name="image"></param> /// <param name="degree">亮度[-255,255]</param> /// <returns></returns> public
static Image Brightness(Image image, int
degree) { try { Bitmap b = (Bitmap)image; if
(degree < -255) degree = -255; if
(degree > 255) degree = 255; int
width = image.Width; int
height = image.Height; int
pix = 0; BitmapData data = b.LockBits(new
Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb); unsafe { byte* p = (byte*)data.Scan0; int
offset = data.Stride - width * 3; for
(int
y = 0; y < height; y++) { for
(int
x = 0; x < width; x++) { // 处理指定位置像素的亮度 for
(int
i = 0; i < 3; i++) { pix = p[i] + degree; if
(degree < 0) p[i] = (byte)Math.Max(0, pix); if
(degree > 0) p[i] = (byte)Math.Min(255, pix); } // i p += 3; } // x p += offset; } // y } b.UnlockBits(data); return
image; } catch { return
null; } } /// <summary> /// 灰色效果 /// </summary> /// <param name="image"></param> /// <returns></returns> public
static Image Gray(Image image) { try { Bitmap currentBitmap = (Bitmap)image.Clone(); Graphics g = Graphics.FromImage(currentBitmap); ImageAttributes ia = new
ImageAttributes(); float[][] colorMatrix = { new
float[] {0.299f, 0.299f, 0.299f, 0, 0}, new
float[] {0.587f, 0.587f, 0.587f, 0, 0}, new
float[] {0.114f, 0.114f, 0.114f, 0, 0}, new
float[] {0, 0, 0, 1, 0}, new
float[] {0, 0, 0, 0, 1} }; ColorMatrix cm = new
ColorMatrix(colorMatrix); ia.SetColorMatrix(cm, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); g.DrawImage(currentBitmap, new
Rectangle(0, 0, currentBitmap.Width, currentBitmap.Height), 0, 0, currentBitmap.Width, currentBitmap.Height, GraphicsUnit.Pixel, ia); g.Dispose(); return
(Image)(currentBitmap.Clone()); } catch { return
null; } } /// <summary> /// 图像对比度调整 /// </summary> /// <param name="b">原始图</param> /// <param name="degree">对比度[-100, 100]</param> /// <returns></returns> public
static Bitmap KiContrast(Bitmap b, int
degree) { if
(b == null) { return
null; } if
(degree < -100) degree = -100; if
(degree > 100) degree = 100; try { double
pixel = 0; double
contrast = (100.0 + degree) / 100.0; contrast *= contrast; int
width = b.Width; int
height = b.Height; BitmapData data = b.LockBits(new
Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb); unsafe { byte* p = (byte*)data.Scan0; int
offset = data.Stride - width * 3; for
(int
y = 0; y < height; y++) { for
(int
x = 0; x < width; x++) { // 处理指定位置像素的对比度 for
(int
i = 0; i < 3; i++) { pixel = ((p[i] / 255.0 - 0.5) * contrast + 0.5) * 255; if
(pixel < 0) pixel = 0; if
(pixel > 255) pixel = 255; p[i] = (byte)pixel; } // i p += 3; } // x p += offset; } // y } b.UnlockBits(data); return
b; } catch { return
null; } } } |
标签：class blog code ext color com
原文地址：http://www.cnblogs.com/fuchao2014/p/3781204.html
