【C#】借助OpenCvSharp读取摄像头并显示

【C#】借助OpenCvSharp读取摄像头并显示

1，首先要安装OpenCvSharp,使用cv2的函数获取设备，并将图像转换到Bitmap

  using OpenCvSharp;using OpenCvSharp.Extensions;    void run_cap(){Mat src = new Mat();FrameSource frame = Cv2.CreateFrameSource_Camera(0);while (f1){frame.NextFrame(src);Bitmap bitmap = BitmapConverter.ToBitmap(src);Invalidate();pictureBox1.Invalidate();imgshow = bitmap;}}

2,在调用时开启线程，可以在主函数内调用，也可在按钮内调用

      private void button1_Click(object sender, EventArgs e){// Image imgshow0 = Image.FromFile("src.jpg");//  pictureBox1.Image = imgshow0;Thread threadA = new Thread(run_cap);threadA.Start();}

3，在form框架调用重绘函数将每一帧重绘到pictureBox1

this.pictureBox1.Paint += PictureBox1_Paint;

4，函数如下：

       private void PictureBox1_Paint(object sender, PaintEventArgs e){if (f){Invalidate();pictureBox1.Invalidate();    e.Graphics.DrawImage(imgshow,0,0);}}

5，运行如下：