【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

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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：