C#调用USB摄像头的方法 C#调用USB摄像头的方法

C#调用USB摄像头使用AForge类库进行开发，供大家参考，具体内容如下
1、AForge安装
右击工程，在管理NuGet程序包中搜索Aforge类库，选择安装，如下图所示

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文章图片

2、进行USB摄像头类封装
a、初始化，初始化时要注意，加载的设备分辨率需要人工配置，如果配置分辨率不存在需要从默认的分辨率中选择

videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice); if (videoDevices.Count > 0 && videoDevices.Count >= CameraIndex){FilterInfo info = videoDevices[videoDevices.Count - 1]; videoSource = new VideoCaptureDevice(info.MonikerString); if (videoSource.VideoCapabilities.Length > 0){VideoCapabilities tmp = videoSource.VideoCapabilities.First(x => x.FrameSize.Width == LocalSize.Width &&x.FrameSize.Height == LocalSize.Height); if (tmp != null){videoSource.SnapshotResolution = tmp; videoSource.VideoResolution = tmp; }else{int index = (videoSource.VideoCapabilities.Length + 1) / 2; tmp = videoSource.VideoCapabilities[index]; }videoSourcePlayer.VideoSource = videoSource; videoSourcePlayer.Start(); videoSource.NewFrame += new NewFrameEventHandler(Video_NewFrame); }}}catch (Exception ex){LogHelper.Debug(ex); }

b、绑定回调方法，此方法在摄像头成功预览之后会实时返回数据帧，封装时可以传入PictureBox，把回调旋转后的图片显示在此控件上

private void Video_NewFrame(object sender, NewFrameEventArgs eventArgs){try{Bitmap video = (Bitmap)eventArgs.Frame.Clone(); BmpRotate(video); if (UsbVideo != null)UsbVideo.Image = video; }catch (Exception ex){LogHelper.Debug(ex); }} /// /// 图像旋转/// /// private void BmpRotate(Bitmap _bmp){try{if (CameraRotate == "0"){}else if (CameraRotate == "90"){_bmp.RotateFlip(RotateFlipType.Rotate90FlipNone); }else if (CameraRotate == "180"){_bmp.RotateFlip(RotateFlipType.Rotate180FlipNone); }else if (CameraRotate == "270"){_bmp.RotateFlip(RotateFlipType.Rotate270FlipNone); }}catch (Exception ex){LogHelper.Debug(ex); }}

【C#调用USB摄像头的方法】c、抓图事件，手动抓图事件，通过调用GetCurrentVideoFrame()方法获取Bitmap图片

public Bitmap GetCurrentVideoFrame(){Bitmap bmp = null; try{bmp = videoSourcePlayer.GetCurrentVideoFrame(); BmpRotate(bmp); }catch (Exception ex){LogHelper.Debug(ex); }return bmp; }

d、摄像头重连，此类库中videoSourcePlayer有个属性IsRunning可以判断是否USB摄像头预览中，可以对设备进行重连

private FilterInfoCollection videoDevices = null; //摄像头设备public VideoCaptureDevice videoSource = null; //视频的来源选择private VideoSourcePlayer videoSourcePlayer = new VideoSourcePlayer(); public Bitmap img = null; public int CameraIndex = 1; /// /// 默认分辨率/// public Size LocalSize = new Size(640, 480); bool isHave = false; public string CameraRotate = "0"; private System.Windows.Forms.PictureBox UsbVideo = null; public void ReConnect(){try{if (!videoSourcePlayer.IsRunning){videoSource.Stop(); videoSource.Start(); }}catch (Exception){}}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。