C＃图像剪切，拆分，节约 [英] C# images cropping,splitting,saving

问题描述

在主题所述，我有一个形象：

 私人图像检测; 
测试=新位图（@sampleimg.jpg）; 
  

我想它拆分成3×3矩阵共9意图像和保存it.Any提示或技巧做这个简单吗？我使用视觉工作室2008年和智能设备的工作。尝试了一些方法，但我不能得到它。这是我尝试：

  INT X = 0; 
 INT Y = 0; 
 INT宽度= 3; 
 INT高度= 3; 
 
 
诠释计数= testing.Width /宽度; 
 BMP位图=新位图（宽，高）; 
 
 
图形G = Graphics.FromImage（BMP）; 
 
 
的for（int i = 0; I<计数;我++）
 {
 g.Clear（Color.Transparent）; 
 g.DrawImage（测试，新的Rectangle（0，0，宽度，高度），新的Rectangle（X，Y，宽，高），GraphicsUnit.Pixel）; 
 bmp.Save（Path.ChangeExtension（@C\AndrewPictures\的String.Format（{0} .BMP，I）））; 
 X + =宽度; 
} 
  

解决方案

根据不同的.NET版本，你可以做以下作物之一：

的。NET 2.0

 私有静态图像cropImage（图片IMG，矩形cropArea）
 {
位图bmpImage =新位图（IMG）; 
位图bmpCrop = bmpImage.Clone（cropArea，
 bmpImage.PixelFormat）; 
回报（图）（bmpCrop）; 
} 
  

或的。NET 3.5 +

  //创建一个图像元素。 
图像croppedImage =新的图像（）; 
 croppedImage.Width = 200; 
 croppedImage.Margin =新厚度（5）; 
 
 //创建一个基于掀起了XAML定义资源的CroppedBitmap。 
 CroppedBitmap CB =新CroppedBitmap（
（的BitmapSource）this.Resources [MASTERIMAGE]，
新Int32Rect（30，20，105，50））; //选择矩形区域
 croppedImage.Source = CB; //设置图像源裁剪
  

正如你所看到的，这是一个有点比简单的你重新做。第一示例克隆当前图像和采用它的一个子集;第二个例子中使用 CroppedBitmap ，它支持直接从构造函数取图像的某一部分。

分裂部分很简单的数学，只分裂图像分成9组坐标并将它们传递到构造。

as stated in subject, i have an image:

    private Image testing;
    testing = new Bitmap(@"sampleimg.jpg");

I would like to split it into 3 x 3 matrix meaning 9 images in total and save it.Any tips or tricks to do this simple? I'm using visual studios 2008 and working on smart devices. Tried some ways but i can't get it. This is what i tried:

        int x = 0;
        int y = 0;
        int width = 3;
        int height = 3;


        int count = testing.Width / width;
        Bitmap bmp = new Bitmap(width, height);


        Graphics g = Graphics.FromImage(bmp);


        for (int i = 0; i < count; i++)
        {
            g.Clear(Color.Transparent);
            g.DrawImage(testing, new Rectangle(0, 0, width, height), new Rectangle(x, y, width, height), GraphicsUnit.Pixel);
            bmp.Save(Path.ChangeExtension(@"C\AndrewPictures\", String.Format(".{0}.bmp",i)));
            x += width;
        } 

解决方案

Depending on the .NET version, you could do one of the following to crop:

.NET 2.0

private static Image cropImage(Image img, Rectangle cropArea)
{
   Bitmap bmpImage = new Bitmap(img);
   Bitmap bmpCrop = bmpImage.Clone(cropArea,
   bmpImage.PixelFormat);
   return (Image)(bmpCrop);
}

Or .NET 3.5+

// Create an Image element.
Image croppedImage = new Image();
croppedImage.Width = 200;
croppedImage.Margin = new Thickness(5);

// Create a CroppedBitmap based off of a xaml defined resource.
CroppedBitmap cb = new CroppedBitmap(     
   (BitmapSource)this.Resources["masterImage"],
   new Int32Rect(30, 20, 105, 50));       //select region rect
croppedImage.Source = cb;                 //set image source to cropped

As you can see, it's a bit more simple than what you're doing. The first example clones the current image and takes a subset of it; the second example uses CroppedBitmap, which supports taking a section of the image right from the constructor.

The splitting part is simple maths, just splitting the image into 9 sets of coordinates and passing them into the constructor.

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