Microsoft ProjectOxford Vision API ClientException 错误

Question

我正在研究 MS 的新功能 API，但在按照教程进行操作时遇到错误。这是我的完整代码。我试图用这个来获得图像的颜色。我得到的 return 是 "Error Return CV" 所以我没有得到 null imageStream 也没有分析结果。先感谢您！

   namespace UWPApp1
{
  public sealed partial class MainPage : Page
{
     IRandomAccessStream imageStream;

    const string APIKEY_CV = [MyComputerVisionKeyComesHere];
    VisionServiceClient VisionClient = new VisionServiceClient(APIKEY_CV);
    AnalysisResult analysisResult;

    public MainPage()
    {
      this.InitializeComponent();
    }

    private async void button_Click(object sender, RoutedEventArgs e)
    {
        try
        {
          FileSavePicker fileSavePicker = new FileSavePicker();
            fileSavePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
            fileSavePicker.FileTypeChoices.Add("JPEG files", new List<string>() { ".jpg" });
            fileSavePicker.SuggestedFileName = "image";

            var outputFile = await fileSavePicker.PickSaveFileAsync();

            if (outputFile == null)
            {
                // The user cancelled the picking operation
                return;
            }

            imageStream = await outputFile.OpenAsync(FileAccessMode.Read);

              BitmapImage imageTest = new BitmapImage();
              imageTest.SetSource(imageStream);

            image.Source = imageTest;
                       }
        catch {
            textBox.Text = "Error taking photo";
        }
    }

    private async void button1_Click(object sender, RoutedEventArgs e)
    {
        try
        {
         VisualFeature[] feature = new VisualFeature[] { VisualFeature.Tags, VisualFeature.Description, VisualFeature.Color };
           analysisResult = await VisionClient.AnalyzeImageAsync(imageStream.AsStream(), feature);

            if (analysisResult != null)
            {
                   var color = analysisResult.Color;
                   textBox.Text = "The Accent Color is" + color.AccentColor;

            }
            else {
                textBox.Text = "analysisResult is null";
            }

        }
        catch {
            textBox.Text = "Error Return CV";
        }
    }

   }

Answer 1

Project oxford vision API ocr exception

我用同样的方法解决了。我添加了 imageStream.Seek(0);在我的代码中

Microsoft ProjectOxford Vision API ClientException 错误

Microsoft ProjectOxford Vision API ClientException Error

c#

vision

microsoft-cognitive