C#System.ArgumentException:&x27;参数不正确。无效的子类型';在windows OCR中
在Windows OCR软件中: 在OcrCapturedImage.xaml.cs中,我不明白为什么会出现以下情况:C#System.ArgumentException:&x27;参数不正确。无效的子类型';在windows OCR中,c#,ocr,C#,Ocr,在Windows OCR软件中: 在OcrCapturedImage.xaml.cs中,我不明白为什么会出现以下情况: using (var currentFrame = await mediaCapture.GetPreviewFrameAsync(videoFrame)) 我得到了以下问题: 系统异常 System.ArgumentException:“参数不正确。 无效的子类型“ 以下是完整的方法: private async void ExtractButton_Tapped(obje
using (var currentFrame = await mediaCapture.GetPreviewFrameAsync(videoFrame))
我得到了以下问题:
系统异常
System.ArgumentException:“参数不正确。
无效的子类型“
以下是完整的方法:
private async void ExtractButton_Tapped(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e)
{
//Get information about the preview.
var previewProperties = mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview) as VideoEncodingProperties;
int videoFrameWidth = (int)previewProperties.Width;
int videoFrameHeight = (int)previewProperties.Height;
// Create the video frame to request a SoftwareBitmap preview frame.
var videoFrame = new VideoFrame(BitmapPixelFormat.Bgra8, videoFrameWidth, videoFrameHeight);
// Capture the preview frame.
using (var currentFrame = await mediaCapture.GetPreviewFrameAsync(videoFrame))
{
// Collect the resulting frame.
SoftwareBitmap bitmap = currentFrame.SoftwareBitmap;
OcrEngine ocrEngine = OcrEngine.TryCreateFromLanguage(ocrLanguage);
if (ocrEngine == null)
{
rootPage.NotifyUser(ocrLanguage.DisplayName + " is not supported.", NotifyType.ErrorMessage);
return;
}
var imgSource = new WriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight);
bitmap.CopyToBuffer(imgSource.PixelBuffer);
PreviewImage.Source = imgSource;
var ocrResult = await ocrEngine.RecognizeAsync(bitmap);
}
}
感谢您的帮助exception stacktrace!好的,不确定您的意思,使用ex.StackTrace,以下是我在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务任务)at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务任务任务)at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()在SDKTemplate.OcrCapturedImage.d_u17.MoveNext()上