裁剪图片，从X，Y获取矩形？ [英] Cropping picture, getting Rectangle from X,Y?

问题描述

我正在尝试从C，C的整数x，y坐标中裁剪图片。
我只是不知道该如何获取图片？

I'm trying to crop a picture in C# from integer x, y coordinates.. I just can't figure out how to get it?

public void doCroppedImage(int pointX, int pointY)
{
    Rectangle cropRect = //???
}

推荐答案

您可以使用此代码。

public static Bitmap CropImage(Image source, int x,int y,int width,int height)
{
    Rectangle crop = new Rectangle(x, y, width, height);

    var bmp = new Bitmap(crop.Width, crop.Height);
    using (var gr = Graphics.FromImage(bmp))
    {
        gr.DrawImage(source, new Rectangle(0, 0, bmp.Width, bmp.Height), crop, GraphicsUnit.Pixel);
    }
    return bmp;
} 

但是要评论一个图像，您不仅要知道x和裁切点的y坐标，以及裁切后图像的宽度和高度。

But one comment, to crop an image you have to know not only the x and y coordinates of cropping point but also the width and height of the cropped image.

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