Recognize image

Document Reader SDK provides the opportunity to recognize data from an image.

First of all, you need to check image browsing permissions.

Xamarin.AndroidXamarin.iOS

Start Intent for getting image:

// creates and starts image browsing intent
// results will be handled in onActivityResult method
private void CreateImageBrowsingRequest()
{
    Intent intent = new Intent();
    intent.SetType("image/*");
    intent.PutExtra(Intent.ExtraAllowMultiple, true);
    intent.SetAction(Intent.ActionGetContent);
    StartActivityForResult(Intent.CreateChooser(intent, "Select Picture"), REQUEST_BROWSE_PICTURE);
}

Handle image browsing results:

protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
    base.OnActivityResult(requestCode, resultCode, data);
    if (resultCode == Result.Ok)
    {
        //Image browsing intent processed successfully
        if (requestCode == REQUEST_BROWSE_PICTURE && data.Data != null)
        {
            var selectedImage = data.Data;
            var bmp = GetBitmap(selectedImage, 1920, 1080);

            loadingDialog = showDialog("Processing image");

            DocumentReader.Instance().StopScanner();
            DocumentReader.Instance().RecognizeImage(bmp, this);
        }
    }
}

Handle scan results:

public void OnCompleted(int action, DocumentReaderResults results, string error)
{
    if (action == DocReaderAction.Complete)
    {
        Toast.MakeText(this, "Completed", ToastLength.Long).Show();
    }
    else
    {
        // something happened before all results were ready
        if (action == DocReaderAction.Cancel)
        {
            Toast.MakeText(this, "Scanning was cancelled", ToastLength.Long).Show();
        }
        else if (action == DocReaderAction.Error)
        {
            Toast.MakeText(this, "Error:" + error, ToastLength.Long).Show();
        }
    }
}

void ShowScannerCompleted(RGLDocReaderAction action, RGLDocumentReaderResults result, string error)
{
    switch (action)
    {
        case RGLDocReaderAction.Cancel:
            Console.WriteLine("Cancelled by user");
            break;
        case RGLDocReaderAction.Complete:
            Console.WriteLine("Completed");;
        case RGLDocReaderAction.Error:
            Console.WriteLine("Error string: " + error);
            break;
        case RGLDocReaderAction.Process:
            Console.WriteLine("Scaning not finished. Result: " + result);
            break;
    }
}

void OnFinishedPickingMedia(object sender, UIImagePickerMediaPickedEventArgs e)
{
    var image = e.Info[UIImagePickerController.OriginalImage] as UIImage;
    if (image != null)
    {
        Console.WriteLine("got the original image");

        docReader.RecognizeImage(image, false, ShowScannerCompleted);
    }
    else
    {
        Console.WriteLine("Something went wrong");
    }

    (sender as UIImagePickerController).DismissModalViewController(true);
}