C#实现图片切割、切图、裁剪

本文实例为大家分享了C#实现图片切割、切图的具体代码，供大家参考，具体内容如下

前台准备两个Image控件。上面是显示原图，下面显示切割后的效果。

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<StackPanel Orientation="Vertical">  <Image Width="450" Height="383" Source="C:\Users\Administrator\Documents\Visual Studio 2015\Projects\SplitPic\SplitPic\Images\1.jpg"/>  <Image x:Name="img" Stretch="None" Width="450" Height="383" /> </StackPanel>

对应的后台代码：

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public partial class MainWindow : Window {  public MainWindow()  {  InitializeComponent();    // 设置原图  img.Source = new BitmapImage(new Uri(@"Images/1.jpg", UriKind.Relative));    // 切割图片  ImageSource imageSource = img.Source;  Bitmap bitmap = SystemUtils.ImageSourceToBitmap(imageSource);  BitmapSource bitmapSource = SystemUtils.BitmapToBitmapImage(bitmap);  BitmapSource newBitmapSource = SystemUtils.CutImage(bitmapSource, new Int32Rect(125, 60, 235, 285));    // 使用切割后的图源  img.Source = newBitmapSource;  }   }     // 图像工具类 public static class SystemUtils {  /// <summary>  /// 切图  /// </summary>  /// <param name="bitmapSource">图源</param>  /// <param name="cut">切割区域</param>  /// <returns></returns>  public static BitmapSource CutImage(BitmapSource bitmapSource, Int32Rect cut)  {  //计算Stride  var stride = bitmapSource.Format.BitsPerPixel * cut.Width / 8;  //声明字节数组  byte[] data = new byte[cut.Height * stride];  //调用CopyPixels  bitmapSource.CopyPixels(cut, data, stride, 0);    return BitmapSource.Create(cut.Width, cut.Height, 0, 0, PixelFormats.Bgr32, null, data, stride);  }    // ImageSource --> Bitmap  public static System.Drawing.Bitmap ImageSourceToBitmap(ImageSource imageSource)  {  BitmapSource m = (BitmapSource)imageSource;    System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(m.PixelWidth, m.PixelHeight, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);    System.Drawing.Imaging.BitmapData data = bmp.LockBits(  new System.Drawing.Rectangle(System.Drawing.Point.Empty, bmp.Size), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);    m.CopyPixels(Int32Rect.Empty, data.Scan0, data.Height * data.Stride, data.Stride); bmp.UnlockBits(data);    return bmp;  }    // Bitmap --> BitmapImage  public static BitmapImage BitmapToBitmapImage(Bitmap bitmap)  {  using (MemoryStream stream = new MemoryStream())  {   bitmap.Save(stream, ImageFormat.Bmp);     stream.Position = 0;   BitmapImage result = new BitmapImage();   result.BeginInit();   // According to MSDN, "The default OnDemand cache option retains access to the stream until the image is needed."   // Force the bitmap to load right now so we can dispose the stream.   result.CacheOption = BitmapCacheOption.OnLoad;   result.StreamSource = stream;   result.EndInit();   result.Freeze();     return result;  }  } }

运行后的效果如下：

补充：关于剪裁的位置和区域的填写说明，如下图。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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