public async Task <IEnumerable <LabelConfidence> > Tags(byte[] image, CustomVisionSettings settings)
{
// Create a prediction endpoint, passing in obtained prediction key
var endpoint = new PredictionEndpoint()
{
ApiKey = settings.CustomVisionPredictionKey
};
Cognitive.CustomVision.Prediction.Models.ImagePredictionResultModel result;
using (var testImage = new MemoryStream(image))
{
// Make a prediction against the prediction project
// IMPORTANT: the prediction project should have an iteration marked as default.
// Otherwise, you need to specify an iteration ID
result = await endpoint.PredictImageWithNoStoreAsync(settings.CustomVisionProjectId, testImage);
}
return(result.Predictions.Select(t => new LabelConfidence()
{
Label = t.Tag, Probability = (float)t.Probability
})
.Where(c => c.Probability >= settings.Threshold)
.OrderByDescending(c => c.Probability));
}
async Task Ok()
{
IsEnabled = false;
try
{
var endpoint = new PredictionEndpoint
{
ApiKey = KeyService.PK
};
if (Guid.TryParse(KeyService.PI, out var pId))
{
var imagePath = "ObjectDetector.Images.single.png";
var assembly = typeof(SettingsViewModel).GetTypeInfo().Assembly;
using (var stream = assembly.GetManifestResourceStream(imagePath))
{
await endpoint.PredictImageWithNoStoreAsync(pId, stream);
}
await KeyService.SetPredictionKey(KeyService.PK);
await KeyService.SetProjectId(KeyService.PI);
Analytics.TrackEvent("Updating keys");
await Application.Current.MainPage.Navigation.PopModalAsync();
}
else
{
Analytics.TrackEvent("Failed updating keys", new Dictionary <string, string> {
{ "Error", "The project Id is not a valid GUID" }
});
await Application.Current.MainPage.DisplayAlert("Error", "The project Id is not a valid GUID", "OK");
}
}
catch (Exception ex)
{
Analytics.TrackEvent("Failed updating keys", new Dictionary <string, string> {
{ "Error", "The project Id and prediction key don't match an existing project" }
});
Crashes.TrackError(ex, new Dictionary <string, string> {
{ "Action", "Testing key and project id" }
});
await Application.Current.MainPage.DisplayAlert("Error", "The project Id and prediction key don't match an existing project", "OK");
}
finally
{
IsEnabled = true;
}
}