如何在位图图像中显示像素值 [英] How Can I Show Pixel Value In A Bitmap Image

问题描述

你好..我是C＃的初学者，我只是想问一下在位图图片中显示每个像素的像素值



我是使用下面的代码打开位图图片：

Hello .. i'm beginner in C# and i just want to ask about to show the pixel value for each pixel in a bitmap picture

I've used the code below to open a bitmap picture:

private void pictureBox1_Click(object sender, EventArgs e)
{
    OpenFileDialog dlg = new OpenFileDialog();
    dlg.Title = "Open Image";
    dlg.Filter = "bmp files (*.bmp)|*.bmp";
    if (dlg.ShowDialog() == DialogResult.OK)
    {
        pictureBox1.Image = Image.FromFile(dlg.FileName);
    }
    dlg.Dispose();

}

我如何修改它以显示标签中的像素值？

How can i modify it to show the pixel value in a label ?

推荐答案

通过显示像素值不确定你的意思，但要获得给定坐标的像素值，你可以使用 Bitmap.GetPixel [ ^ ]

Not sure what you mean by showing the pixel value, but to get the pixel value for a given coordinate you can use Bitmap.GetPixel[^]

假设：



0.你有WinForm，'FrmViewColors



1.你在表格上有一个PictureBox '图片属性设置'，pbxViewColors



2.你在表格上有一个标签，'lblColor



3.为PictureBox的MouseMove事件创建一个EventHandler

Assume:

0. you have WinForm, 'FrmViewColors

1. you have a PictureBox on a Form with its 'Image property set, 'pbxViewColors

2. you have a Label on the Form, 'lblColor

3. you create an EventHandler for the MouseMove Event of the PictureBox

private Bitmap bmp;

private void FrmViewColors_Load(object sender, EventArgs e)
{
    // get the Bitmap from the PictureBox Image
    bmp = // left for you to figure out
}

// EventHandler
private void pbxViewColors_MouseMove(object sender, MouseEventArgs e)
{
    Color clr = bmp.GetPixel(e.X, e.Y);

    lblColor.Text = // left for you to figure out
}

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