C#,Aforge调用摄像头,实时处理图像,灰度化/二值化；

//声明全局函数

private FilterInfoCollection videoDevices;
private VideoCaptureDevice videoSource;
private static int jj;

//Aforge调用摄像头

 private void Form1_Load(object sender, EventArgs e)
        {
            videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            if (videoDevices.Count == 0)
            {
                throw new ApplicationException();
            }
            foreach(FilterInfo device in videoDevices)
            {
                comboBox1.Items.Add(device.Name);
            }
            comboBox1.SelectedIndex = 0;
        }

//链接摄像头

 private void button1_Click(object sender, EventArgs e)
        {
            CameraConn();
        }

        private void CameraConn()
        {
            VideoCaptureDevice videoSource = new VideoCaptureDevice(videoDevices[comboBox1.SelectedIndex].MonikerString);

            videoSourcePlayer1.VideoSource = videoSource;
            videoSourcePlayer1.Start();

        }

//捕获摄像头当前画面，生成灰度化图片

private void button2_Click_1(object sender, EventArgs e)
        {
            pictureBox1.Image= videoSourcePlayer1.GetCurrentVideoFrame();
          
        }

//捕获摄像头当前画面，生成成二值化图片

private void button2_Click(object sender, EventArgs e)
        {
            Bitmap b = videoSourcePlayer1.GetCurrentVideoFrame();
            pictureBox1.Image = ConvertTo1Bpp1(b);
        }

--------------------------------------------------------灰度化，二值化函数操作方法-------------------------------------------

// 图像灰度化操作函数
        public static Bitmap ToGray(Bitmap bmp)
        {
            for (int i = 0; i < bmp.Width; i++)
            {
                for (int j = 0; j < bmp.Height; j++)
                {
                    //获取该点的像素的RGB的颜色
                    Color color = bmp.GetPixel(i, j);
                    //利用公式计算灰度值
                    int gray = (int)(color.R * 0.3 + color.G * 0.59 + color.B * 0.11);
                    Color newColor = Color.FromArgb(gray, gray, gray);
                    bmp.SetPixel(i, j, newColor);
                }
            }
            return bmp;
        }

// 图像二值化1：取图片的平均灰度作为阈值，低于该值的全都为0，高于该值的全都为255
        public static Bitmap ConvertTo1Bpp1(Bitmap bmp)
        {
            int average = 0;

            average = 122;
            jj = average;  //将阈值传递出来
            for (int i = 0; i < bmp.Width; i++)
            {
                for (int j = 0; j < bmp.Height; j++)
                {
                    //获取该点的像素的RGB的颜色
                    Color color = bmp.GetPixel(i, j);
                    int value = 255 - color.B;
                    Color newColor = value > average ? Color.FromArgb(0, 0, 0) : Color.FromArgb(255, 255, 255);
                    bmp.SetPixel(i, j, newColor);
                }
            }
            return bmp;
        }

//用到的指令集

using AForge.Video.DirectShow;
using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;