VB.net中的颜色识别 [英] Color Recognition in VB.net , Rgb

问题描述

大家好，

现在，我想对存储在硬盘中的图片进行颜色识别.我想分开颜色(哪个像素是蓝色，哪个像素是红色，依此类推).我使用了Visual Studio 2008.有可能发展吗?任何人都可以向我提出建议.

Hi All,

Now I want to make color recognition for picture that stored in hard disk. I want to separate color (which pixel is blue, which pixel is red and so on). I used Visual Studio 2008 . Is it possible to develop it? Anyone make me suggestion , please.

推荐答案

仔细阅读以下代码，这可能会对您有所帮助

go through the below code this may helps you

using System;
using System.Drawing;
using System.Windows.Forms;

namespace GetPixelExample
{
    public class Form1 : Form
    {
        private class ImageControl : Panel
        {
            private Bitmap bitmap = new Bitmap("C:\\alien.jpg");

            public ImageControl()
            {
                MouseMove += new MouseEventHandler(HandleMouseMove);
            }

            private void HandleMouseMove(object sender, MouseEventArgs e)
            {
                // Scale the window coordinates to the bitmap coordinates
                double windowX = e.X;
                double windowY = e.Y;

                double controlWidth = Width;
                double controlHeight = Height;
                double imageWidth = bitmap.Width;
                double imageHeight = bitmap.Height;

                Color pixel = bitmap.GetPixel(
                   (int)(windowX * bitmap.Width / controlWidth), 
                   (int)(windowY * bitmap.Height / controlHeight));
                System.Diagnostics.Debug.WriteLine(pixel);
            }

            protected override void OnResize(EventArgs eventargs)
            {
                base.OnResize(eventargs);
                Invalidate();
            }

            protected override void  OnPaintBackground(PaintEventArgs pevent)
            {
                 pevent.Graphics.DrawImage(bitmap, Bounds);
            }
        }

        public Form1()
        {
            ImageControl control = new ImageControl();
            control.Dock = DockStyle.Fill;
            Controls.Add(control);
            this.PerformLayout();
        }

        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

是的，有可能.但这可能并不像您想的那么简单-它可能取决于文件的存储方式.位图很简单:一个像素就是一个像素. jpeg并不是那么容易:使用有损"算法对数据进行压缩，因此以蓝色像素旁边的红色像素开始的颜色可能变成洋红色像素.

无论哪种方式，首先要开始的是加载图像:

Yes, it it possible. But it may not be as simple as you think - it may depend on what the file is stored as. A bitmap is easy: a pixel is a pixel. A jpeg is not so easy: the data is compressed using a "lossy" algorithm, so what starts out as a red pixel next to a blue pixel may become a magenta pixel.

Either way, the first place to start is to load your image:

Image i = Image.FromFile(path);

然后分别查看每个像素:

Then look at each pixel individually:

int pixel = i.GetPixel(x, y);

然后，像素包含ARGB值.

The pixel then contains the ARGB value.

int Red = (pixel >> 16) & 0xFF;
int Green = (pixel >> 8) & 0xFF;
int Blue = pixel & 0xFF;

这篇关于VB.net中的颜色识别的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！