C#图片处理类分享

using System;using System.Collections;using System.IO;using System.Drawing;using System.Drawing.Imaging;using System.Drawing.Drawing2D;namespace DotNet.Utilities{ public class ImageClass {  public ImageClass()  { }  #region 缩略图  /// <summary>  /// 生成缩略图  /// </summary>  /// <param name="originalImagePath">源图路径（物理路径）</param>  /// <param name="thumbnailPath">缩略图路径（物理路径）</param>  /// <param name="width">缩略图宽度</param>  /// <param name="height">缩略图高度</param>  /// <param name="mode">生成缩略图的方式</param>   public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)  {   System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);   int towidth = width;   int toheight = height;   int x = 0;   int y = 0;   int ow = originalImage.Width;   int oh = originalImage.Height;   switch (mode)   {    case "HW": //指定高宽缩放（可能变形）         break;    case "W": //指定宽，高按比例          toheight = originalImage.Height * width / originalImage.Width;     break;    case "H": //指定高，宽按比例     towidth = originalImage.Width * height / originalImage.Height;     break;    case "Cut": //指定高宽裁减（不变形）         if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)     {      oh = originalImage.Height;      ow = originalImage.Height * towidth / toheight;      y = 0;      x = (originalImage.Width - ow) / 2;     }     else     {      ow = originalImage.Width;      oh = originalImage.Width * height / towidth;      x = 0;      y = (originalImage.Height - oh) / 2;     }     break;    default:     break;   }   //新建一个bmp图片   System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);   //新建一个画板   System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);   //设置高质量插值法   g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;   //设置高质量,低速度呈现平滑程度   g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;   //清空画布并以透明背景色填充   g.Clear(System.Drawing.Color.Transparent);   //在指定位置并且按指定大小绘制原图片的指定部分   g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight), new System.Drawing.Rectangle(x, y, ow, oh), System.Drawing.GraphicsUnit.Pixel);   try   {    //以jpg格式保存缩略图    bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);   }   catch (System.Exception e)   {    throw e;   }   finally   {    originalImage.Dispose();    bitmap.Dispose();    g.Dispose();   }  }  #endregion  #region 图片水印  /// <summary>  /// 图片水印处理方法  /// </summary>  /// <param name="path">需要加载水印的图片路径（绝对路径）</param>  /// <param name="waterpath">水印图片（绝对路径）</param>  /// <param name="location">水印位置（传送正确的代码）</param>  public static string ImageWatermark(string path, string waterpath, string location)  {   string kz_name = Path.GetExtension(path);   if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg")   {    DateTime time = DateTime.Now;    string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();    Image img = Bitmap.FromFile(path);    Image waterimg = Image.FromFile(waterpath);    Graphics g = Graphics.FromImage(img);    ArrayList loca = GetLocation(location, img, waterimg);    g.DrawImage(waterimg, new Rectangle(int.Parse(loca[0].ToString()), int.Parse(loca[1].ToString()), waterimg.Width, waterimg.Height));    waterimg.Dispose();    g.Dispose();    string newpath = Path.GetDirectoryName(path) + filename + kz_name;    img.Save(newpath);    img.Dispose();    File.Copy(newpath, path, true);    if (File.Exists(newpath))    {     File.Delete(newpath);    }   }   return path;  }  /// <summary>  /// 图片水印位置处理方法  /// </summary>  /// <param name="location">水印位置</param>  /// <param name="img">需要添加水印的图片</param>  /// <param name="waterimg">水印图片</param>  private static ArrayList GetLocation(string location, Image img, Image waterimg)  {   ArrayList loca = new ArrayList();   int x = 0;   int y = 0;   if (location == "LT")   {    x = 10;    y = 10;   }   else if (location == "T")   {    x = img.Width / 2 - waterimg.Width / 2;    y = img.Height - waterimg.Height;   }   else if (location == "RT")   {    x = img.Width - waterimg.Width;    y = 10;   }   else if (location == "LC")   {    x = 10;    y = img.Height / 2 - waterimg.Height / 2;   }   else if (location == "C")   {    x = img.Width / 2 - waterimg.Width / 2;    y = img.Height / 2 - waterimg.Height / 2;   }   else if (location == "RC")   {    x = img.Width - waterimg.Width;    y = img.Height / 2 - waterimg.Height / 2;   }   else if (location == "LB")   {    x = 10;    y = img.Height - waterimg.Height;   }   else if (location == "B")   {    x = img.Width / 2 - waterimg.Width / 2;    y = img.Height - waterimg.Height;   }   else   {    x = img.Width - waterimg.Width;    y = img.Height - waterimg.Height;   }   loca.Add(x);   loca.Add(y);   return loca;  }  #endregion  #region 文字水印  /// <summary>  /// 文字水印处理方法  /// </summary>  /// <param name="path">图片路径（绝对路径）</param>  /// <param name="size">字体大小</param>  /// <param name="letter">水印文字</param>  /// <param name="color">颜色</param>  /// <param name="location">水印位置</param>  public static string LetterWatermark(string path, int size, string letter, Color color, string location)  {   #region   string kz_name = Path.GetExtension(path);   if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg")   {    DateTime time = DateTime.Now;    string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();    Image img = Bitmap.FromFile(path);    Graphics gs = Graphics.FromImage(img);    ArrayList loca = GetLocation(location, img, size, letter.Length);    Font font = new Font("宋体", size);    Brush br = new SolidBrush(color);    gs.DrawString(letter, font, br, float.Parse(loca[0].ToString()), float.Parse(loca[1].ToString()));    gs.Dispose();    string newpath = Path.GetDirectoryName(path) + filename + kz_name;    img.Save(newpath);    img.Dispose();    File.Copy(newpath, path, true);    if (File.Exists(newpath))    {     File.Delete(newpath);    }   }   return path;   #endregion  }  /// <summary>  /// 文字水印位置的方法  /// </summary>  /// <param name="location">位置代码</param>  /// <param name="img">图片对象</param>  /// <param name="width">宽(当水印类型为文字时,传过来的就是字体的大小)</param>  /// <param name="height">高(当水印类型为文字时,传过来的就是字符的长度)</param>  private static ArrayList GetLocation(string location, Image img, int width, int height)  {   #region   ArrayList loca = new ArrayList(); //定义数组存储位置   float x = 10;   float y = 10;   if (location == "LT")   {    loca.Add(x);    loca.Add(y);   }   else if (location == "T")   {    x = img.Width / 2 - (width * height) / 2;    loca.Add(x);    loca.Add(y);   }   else if (location == "RT")   {    x = img.Width - width * height;   }   else if (location == "LC")   {    y = img.Height / 2;   }   else if (location == "C")   {    x = img.Width / 2 - (width * height) / 2;    y = img.Height / 2;   }   else if (location == "RC")   {    x = img.Width - height;    y = img.Height / 2;   }   else if (location == "LB")   {    y = img.Height - width - 5;   }   else if (location == "B")   {    x = img.Width / 2 - (width * height) / 2;    y = img.Height - width - 5;   }   else   {    x = img.Width - width * height;    y = img.Height - width - 5;   }   loca.Add(x);   loca.Add(y);   return loca;   #endregion  }  #endregion  #region 调整光暗  /// <summary>  /// 调整光暗  /// </summary>  /// <param name="mybm">原始图片</param>  /// <param name="width">原始图片的长度</param>  /// <param name="height">原始图片的高度</param>  /// <param name="val">增加或减少的光暗值</param>  public Bitmap LDPic(Bitmap mybm, int width, int height, int val)  {   Bitmap bm = new Bitmap(width, height);//初始化一个记录经过处理后的图片对象   int x, y, resultR, resultG, resultB;//x、y是循环次数，后面三个是记录红绿蓝三个值的   Color pixel;   for (x = 0; x < width; x++)   {    for (y = 0; y < height; y++)    {     pixel = mybm.GetPixel(x, y);//获取当前像素的值     resultR = pixel.R + val;//检查红色值会不会超出[0, 255]     resultG = pixel.G + val;//检查绿色值会不会超出[0, 255]     resultB = pixel.B + val;//检查蓝色值会不会超出[0, 255]     bm.SetPixel(x, y, Color.FromArgb(resultR, resultG, resultB));//绘图    }   }   return bm;  }  #endregion  #region 反色处理  /// <summary>  /// 反色处理  /// </summary>  /// <param name="mybm">原始图片</param>  /// <param name="width">原始图片的长度</param>  /// <param name="height">原始图片的高度</param>  public Bitmap RePic(Bitmap mybm, int width, int height)  {   Bitmap bm = new Bitmap(width, height);//初始化一个记录处理后的图片的对象   int x, y, resultR, resultG, resultB;   Color pixel;   for (x = 0; x < width; x++)   {    for (y = 0; y < height; y++)    {     pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值     resultR = 255 - pixel.R;//反红     resultG = 255 - pixel.G;//反绿     resultB = 255 - pixel.B;//反蓝     bm.SetPixel(x, y, Color.FromArgb(resultR, resultG, resultB));//绘图    }   }   return bm;  }  #endregion  #region 浮雕处理  /// <summary>  /// 浮雕处理  /// </summary>  /// <param name="oldBitmap">原始图片</param>  /// <param name="Width">原始图片的长度</param>  /// <param name="Height">原始图片的高度</param>  public Bitmap FD(Bitmap oldBitmap, int Width, int Height)  {   Bitmap newBitmap = new Bitmap(Width, Height);   Color color1, color2;   for (int x = 0; x < Width - 1; x++)   {    for (int y = 0; y < Height - 1; y++)    {     int r = 0, g = 0, b = 0;     color1 = oldBitmap.GetPixel(x, y);     color2 = oldBitmap.GetPixel(x + 1, y + 1);     r = Math.Abs(color1.R - color2.R + 128);     g = Math.Abs(color1.G - color2.G + 128);     b = Math.Abs(color1.B - color2.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;  }  #endregion  #region 拉伸图片  /// <summary>  /// 拉伸图片  /// </summary>  /// <param name="bmp">原始图片</param>  /// <param name="newW">新的宽度</param>  /// <param name="newH">新的高度</param>  public static Bitmap ResizeImage(Bitmap bmp, int newW, int newH)  {   try   {    Bitmap bap = new Bitmap(newW, newH);    Graphics g = Graphics.FromImage(bap);    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;    g.DrawImage(bap, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bap.Width, bap.Height), GraphicsUnit.Pixel);    g.Dispose();    return bap;   }   catch   {    return null;   }  }  #endregion  #region 滤色处理  /// <summary>  /// 滤色处理  /// </summary>  /// <param name="mybm">原始图片</param>  /// <param name="width">原始图片的长度</param>  /// <param name="height">原始图片的高度</param>  public Bitmap FilPic(Bitmap mybm, int width, int height)  {   Bitmap bm = new Bitmap(width, height);//初始化一个记录滤色效果的图片对象   int x, y;   Color pixel;   for (x = 0; x < width; x++)   {    for (y = 0; y < height; y++)    {     pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值     bm.SetPixel(x, y, Color.FromArgb(0, pixel.G, pixel.B));//绘图    }   }   return bm;  }  #endregion  #region 左右翻转  /// <summary>  /// 左右翻转  /// </summary>  /// <param name="mybm">原始图片</param>  /// <param name="width">原始图片的长度</param>  /// <param name="height">原始图片的高度</param>  public Bitmap RevPicLR(Bitmap mybm, int width, int height)  {   Bitmap bm = new Bitmap(width, height);   int x, y, z; //x,y是循环次数,z是用来记录像素点的x坐标的变化的   Color pixel;   for (y = height - 1; y >= 0; y--)   {    for (x = width - 1, z = 0; x >= 0; x--)    {     pixel = mybm.GetPixel(x, y);//获取当前像素的值     bm.SetPixel(z++, y, Color.FromArgb(pixel.R, pixel.G, pixel.B));//绘图    }   }   return bm;  }  #endregion  #region 上下翻转  /// <summary>  /// 上下翻转  /// </summary>  /// <param name="mybm">原始图片</param>  /// <param name="width">原始图片的长度</param>  /// <param name="height">原始图片的高度</param>  public Bitmap RevPicUD(Bitmap mybm, int width, int height)  {   Bitmap bm = new Bitmap(width, height);   int x, y, z;   Color pixel;   for (x = 0; x < width; x++)   {    for (y = height - 1, z = 0; y >= 0; y--)    {     pixel = mybm.GetPixel(x, y);//获取当前像素的值     bm.SetPixel(x, z++, Color.FromArgb(pixel.R, pixel.G, pixel.B));//绘图    }   }   return bm;  }  #endregion  #region 压缩图片  /// <summary>  /// 压缩到指定尺寸  /// </summary>  /// <param name="oldfile">原文件</param>  /// <param name="newfile">新文件</param>  public bool Compress(string oldfile, string newfile)  {   try   {    System.Drawing.Image img = System.Drawing.Image.FromFile(oldfile);    System.Drawing.Imaging.ImageFormat thisFormat = img.RawFormat;    Size newSize = new Size(100, 125);    Bitmap outBmp = new Bitmap(newSize.Width, newSize.Height);    Graphics g = Graphics.FromImage(outBmp);    g.CompositingQuality = CompositingQuality.HighQuality;    g.SmoothingMode = SmoothingMode.HighQuality;    g.InterpolationMode = InterpolationMode.HighQualityBicubic;    g.DrawImage(img, new Rectangle(0, 0, newSize.Width, newSize.Height), 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);    g.Dispose();    EncoderParameters encoderParams = new EncoderParameters();    long[] quality = new long[1];    quality[0] = 100;    EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);    encoderParams.Param[0] = encoderParam;    ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();    ImageCodecInfo jpegICI = null;    for (int x = 0; x < arrayICI.Length; x++)     if (arrayICI[x].FormatDescription.Equals("JPEG"))     {      jpegICI = arrayICI[x]; //设置JPEG编码      break;     }    img.Dispose();    if (jpegICI != null) outBmp.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);    outBmp.Dispose();    return true;   }   catch   {    return false;   }  }  #endregion  #region 图片灰度化  public Color Gray(Color c)  {   int rgb = Convert.ToInt32((double)(((0.3 * c.R) + (0.59 * c.G)) + (0.11 * c.B)));   return Color.FromArgb(rgb, rgb, rgb);  }  #endregion  #region 转换为黑白图片  /// <summary>  /// 转换为黑白图片  /// </summary>  /// <param name="mybt">要进行处理的图片</param>  /// <param name="width">图片的长度</param>  /// <param name="height">图片的高度</param>  public Bitmap BWPic(Bitmap mybm, int width, int height)  {   Bitmap bm = new Bitmap(width, height);   int x, y, result; //x,y是循环次数，result是记录处理后的像素值   Color pixel;   for (x = 0; x < width; x++)   {    for (y = 0; y < height; y++)    {     pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值     result = (pixel.R + pixel.G + pixel.B) / 3;//取红绿蓝三色的平均值     bm.SetPixel(x, y, Color.FromArgb(result, result, result));    }   }   return bm;  }  #endregion  #region 获取图片中的各帧  /// <summary>  /// 获取图片中的各帧  /// </summary>  /// <param name="pPath">图片路径</param>  /// <param name="pSavePath">保存路径</param>  public void GetFrames(string pPath, string pSavedPath)  {   Image gif = Image.FromFile(pPath);   FrameDimension fd = new FrameDimension(gif.FrameDimensionsList[0]);   int count = gif.GetFrameCount(fd); //获取帧数(gif图片可能包含多帧，其它格式图片一般仅一帧)   for (int i = 0; i < count; i++) //以Jpeg格式保存各帧   {    gif.SelectActiveFrame(fd, i);    gif.Save(pSavedPath + "//frame_" + i + ".jpg", ImageFormat.Jpeg);   }  }  #endregion }}