BS—圖片處理(程式碼)
阿新 • • 發佈:2019-01-10
將下面所有圖片處理的方法,封裝為一個類,直接呼叫裡面的方法,然後對圖片進行處理。
using System;
using System.Collections;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
一、縮圖:
#region 縮圖 /// <summary> /// 生成縮圖 /// </summary> /// <param name="originalImagePath">源圖路徑(物理路徑)</param> /// <param name="thumbnailPath">縮圖路徑(物理路徑)</param> /// <param name="width">縮圖寬度</param> /// <param name="height">縮圖高度</param> /// <param name="mode">生成縮圖的方式</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": //指定高寬縮放(可能變形) break; case "W": //指定寬,高按比例 toheight = originalImage.Height * width / originalImage.Width; break; case "H": //指定高,寬按比例 towidth = originalImage.Width * height / originalImage.Height; break; case "Cut": //指定高寬裁減(不變形) 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; } //新建一個bmp圖片 System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight); //新建一個畫板 System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap); //設定高質量插值法 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; //設定高質量,低速度呈現平滑程度 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; //清空畫布並以透明背景色填充 g.Clear(System.Drawing.Color.Transparent); //在指定位置並且按指定大小繪製原圖片的指定部分 //第一個:對哪張圖片進行操作。 //二:畫多麼大。 //三:畫那塊區域。 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格式儲存縮圖 bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg); } catch (System.Exception e) { throw e; } finally { originalImage.Dispose(); bitmap.Dispose(); g.Dispose(); } } #endregion
二、圖片水印
#region 圖片水印 /// <summary> /// 圖片水印處理方法 /// </summary> /// <param name="path">需要載入水印的圖片路徑(絕對路徑)</param> /// <param name="waterpath">水印圖片(絕對路徑)</param> /// <param name="location">水印位置(傳送正確的程式碼)</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> /// 圖片水印位置處理方法 /// </summary> /// <param name="location">水印位置</param> /// <param name="img">需要新增水印的圖片</param> /// <param name="waterimg">水印圖片</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
三、文字水印
#region 文字水印 /// <summary> /// 文字水印處理方法 /// </summary> /// <param name="path">圖片路徑(絕對路徑)</param> /// <param name="size">字型大小</param> /// <param name="letter">水印文字</param> /// <param name="color">顏色</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("宋體", 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">位置程式碼</param> /// <param name="img">圖片物件</param> /// <param name="width">寬(當水印型別為文字時,傳過來的就是字型的大小)</param> /// <param name="height">高(當水印型別為文字時,傳過來的就是字元的長度)</param> private static ArrayList GetLocation(string location, Image img, int width, int height) { #region ArrayList loca = new ArrayList(); //定義陣列儲存位置 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
四、調整光暗
#region 調整光暗
/// <summary>
/// 調整光暗
/// </summary>
/// <param name="mybm">原始圖片</param>
/// <param name="width">原始圖片的長度</param>
/// <param name="height">原始圖片的高度</param>
/// <param name="val">增加或減少的光暗值</param>
public Bitmap LDPic(Bitmap mybm, int width, int height, int val)
{
Bitmap bm = new Bitmap(width, height);//初始化一個記錄經過處理後的圖片物件
int x, y, resultR, resultG, resultB;//x、y是迴圈次數,後面三個是記錄紅綠藍三個值的
Color pixel;
for (x = 0; x < width; x++)
{
for (y = 0; y < height; y++)
{
pixel = mybm.GetPixel(x, y);//獲取當前畫素的值
resultR = pixel.R + val;//檢查紅色值會不會超出[0, 255]
resultG = pixel.G + val;//檢查綠色值會不會超出[0, 255]
resultB = pixel.B + val;//檢查藍色值會不會超出[0, 255]
bm.SetPixel(x, y, Color.FromArgb(resultR, resultG, resultB));//繪圖
}
}
return bm;
}
#endregion
五、反色處理
#region 反色處理
/// <summary>
/// 反色處理
/// </summary>
/// <param name="mybm">原始圖片</param>
/// <param name="width">原始圖片的長度</param>
/// <param name="height">原始圖片的高度</param>
public Bitmap RePic(Bitmap mybm, int width, int height)
{
Bitmap bm = new Bitmap(width, height);//初始化一個記錄處理後的圖片的物件
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);//獲取當前座標的畫素值
resultR = 255 - pixel.R;//反紅
resultG = 255 - pixel.G;//反綠
resultB = 255 - pixel.B;//反藍
bm.SetPixel(x, y, Color.FromArgb(resultR, resultG, resultB));//繪圖
}
}
return bm;
}
#endregion
六、浮雕處理
#region 浮雕處理
/// <summary>
/// 浮雕處理
/// </summary>
/// <param name="oldBitmap">原始圖片</param>
/// <param name="Width">原始圖片的長度</param>
/// <param name="Height">原始圖片的高度</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
七、拉伸圖片
#region 拉伸圖片
/// <summary>
/// 拉伸圖片
/// </summary>
/// <param name="bmp">原始圖片</param>
/// <param name="newW">新的寬度</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
八、濾色處理
#region 濾色處理
/// <summary>
/// 濾色處理
/// </summary>
/// <param name="mybm">原始圖片</param>
/// <param name="width">原始圖片的長度</param>
/// <param name="height">原始圖片的高度</param>
public Bitmap FilPic(Bitmap mybm, int width, int height)
{
Bitmap bm = new Bitmap(width, height);//初始化一個記錄濾色效果的圖片物件
int x, y;
Color pixel;
for (x = 0; x < width; x++)
{
for (y = 0; y < height; y++)
{
pixel = mybm.GetPixel(x, y);//獲取當前座標的畫素值
bm.SetPixel(x, y, Color.FromArgb(0, pixel.G, pixel.B));//繪圖
}
}
return bm;
}
#endregion
九、左右翻轉+上下翻轉
#region 左右翻轉
/// <summary>
/// 左右翻轉
/// </summary>
/// <param name="mybm">原始圖片</param>
/// <param name="width">原始圖片的長度</param>
/// <param name="height">原始圖片的高度</param>
public Bitmap RevPicLR(Bitmap mybm, int width, int height)
{
Bitmap bm = new Bitmap(width, height);
int x, y, z; //x,y是迴圈次數,z是用來記錄畫素點的x座標的變化的
Color pixel;
for (y = height - 1; y >= 0; y--)
{
for (x = width - 1, z = 0; x >= 0; x--)
{
pixel = mybm.GetPixel(x, y);//獲取當前畫素的值
bm.SetPixel(z++, y, Color.FromArgb(pixel.R, pixel.G, pixel.B));//繪圖
}
}
return bm;
}
#endregion
上下翻轉
#region 上下翻轉
/// <summary>
/// 上下翻轉
/// </summary>
/// <param name="mybm">原始圖片</param>
/// <param name="width">原始圖片的長度</param>
/// <param name="height">原始圖片的高度</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);//獲取當前畫素的值
bm.SetPixel(x, z++, Color.FromArgb(pixel.R, pixel.G, pixel.B));//繪圖
}
}
return bm;
}
#endregion
十、壓縮圖片
#region 壓縮圖片
/// <summary>
/// 壓縮到指定尺寸
/// </summary>
/// <param name="oldfile">原檔案</param>
/// <param name="newfile">新檔案</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]; //設定JPEG編碼
break;
}
img.Dispose();
if (jpegICI != null) outBmp.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);
outBmp.Dispose();
return true;
}
catch
{
return false;
}
}
#endregion
十一、圖片灰度化
#region 圖片灰度化
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
十二、轉化為黑白圖片
#region 轉換為黑白圖片
/// <summary>
/// 轉換為黑白圖片
/// </summary>
/// <param name="mybt">要進行處理的圖片</param>
/// <param name="width">圖片的長度</param>
/// <param name="height">圖片的高度</param>
public Bitmap BWPic(Bitmap mybm, int width, int height)
{
Bitmap bm = new Bitmap(width, height);
int x, y, result; //x,y是迴圈次數,result是記錄處理後的畫素值
Color pixel;
for (x = 0; x < width; x++)
{
for (y = 0; y < height; y++)
{
pixel = mybm.GetPixel(x, y);//獲取當前座標的畫素值
result = (pixel.R + pixel.G + pixel.B) / 3;//取紅綠藍三色的平均值
bm.SetPixel(x, y, Color.FromArgb(result, result, result));
}
}
return bm;
}
#endregion
十三、獲取圖片的各幀
#region 獲取圖片中的各幀
/// <summary>
/// 獲取圖片中的各幀
/// </summary>
/// <param name="pPath">圖片路徑</param>
/// <param name="pSavePath">儲存路徑</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); //獲取幀數(gif圖片可能包含多幀,其它格式圖片一般僅一幀)
for (int i = 0; i < count; i++) //以Jpeg格式儲存各幀
{
gif.SelectActiveFrame(fd, i);
gif.Save(pSavedPath + "\\frame_" + i + ".jpg", ImageFormat.Jpeg);
}
}
#endregion