WPF 使用Image 捕获摄像头数据，并将image改为圆形

1.Microsoft.Windows.SDK.Contracts

2.MMaitre.MediaCaptureWPF 

           captureManager = new MediaCapture();
            await captureManager.InitializeAsync(); 
            var preview1 = new CapturePreview(captureManager);
            this.preview.Source = preview1; 
            await preview1.StartAsync();