选择图像区域 [英] Select Area of Image

问题描述

我正在尝试使用openfiledialog选择我选择的图像区域
我想要选择的区域是xx的16x16，y坐标5,5
一旦选择了我想要的将16x16图像绘制到坐标0,0处的另一个pictureBox中

I'm trying to select an area of an image I've selected using openfiledialog The area I'm trying to select is 16x16 from x,y coordinates 5,5 Once selected I want to draw the 16x16 image into another pictureBox at coordinates 0,0

这是我得到的代码，但我无法选择正确的部分原始图片，有人建议为什么它不起作用？

This is the code I've got but I can't get it to select the correct part of the original image, anybody any suggestions as to why it doesn't work?

DialogResult result = openFileDialog1.ShowDialog();
if (result == DialogResult.OK) // Test result.
{
    Image origImage = Image.FromFile(openFileDialog1.FileName);
    pictureBoxSkin.Image = origImage;
    lblOriginalFilename.Text = openFileDialog1.SafeFileName;

    System.Drawing.Bitmap bmp = new Bitmap(16, 16);
    Graphics g3 = Graphics.FromImage(bmp);
    g3.DrawImageUnscaled(origImage, 0, 0, 16, 16);

    Graphics g2 = pictureBoxNew.CreateGraphics();
    g2.DrawImageUnscaled(bmp, 0, 0, 16, 16);
}

推荐答案

为了选择正确的部分，只需替换：

In order to select the correct section, just replace:

g3.DrawImageUnscaled(origImage, 0, 0, 16, 16);

with

g3.DrawImageUnscaled(origImage, -5, -5, 16, 16);

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