/// <summary>
/// Triggered when the file picker button is clicked
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void UIButtonFilePick_Click(object sender, RoutedEventArgs e)
{
// Pick image file
var imageFiles = await GetFilesPickedAsync();
if (imageFiles == null || imageFiles.Count == 0)
{
return;
}
await UIParameterDialog.ShowAsync();
UIResultPanel.Items.Clear();
m_imageToProcessTotal = imageFiles.Count;
UIProgressMaxValue.Text = m_imageToProcessTotal.ToString();
m_hashTags = ImmutableHashSet.CreateBuilder(new TagEqualityComparer());
// Disable UI
UIOptionPanel.IsEnabled = false;
UIButtonFilePick.IsEnabled = false;
UIHashTagBrowser.IsEnabled = false;
UIClearFilterButton.IsEnabled = false;
NotifyUser("", NotifyType.ClearMessage);
// Start our stopwatch to measure the time it takes to process all of this
m_perfWatch.Restart();
m_e2eRunTime = (float)m_perfWatch.ElapsedTicks / Stopwatch.Frequency * 1000f;
m_imageProcessedCount = 0;
UIFilterPanel.Visibility = Visibility.Collapsed;
UIProgressPanel.Visibility = Visibility.Visible;
UIExecutionProgressRing.Visibility = Visibility.Visible;
UIExecutionProgressRing.IsActive = true;
// Process each image selected
foreach (var file in imageFiles)
{
// Take a lock for using a binding if one is available, or wait if not
await m_bindingLock.WaitAsync();
// Display a staging content in our UI
ResultItemUserControl resultItem = new ResultItemUserControl();
UIResultPanel.Items.Add(resultItem);
// Start a task that will Load the frame, display it in the UI, binf it and schedule
// execution of the skill against that binding
// (fire and forget)
var bindingTask = Task.Run(async() =>
{
ConceptTaggerBinding binding = null;
// Execute concept tag skill
try
{
// Load the VideoFrame from the image file
var frame = await LoadVideoFrameFromFileAsync(file);
if (frame == null)
{
throw new Exception($"Error reading image file: {file.Path}");
}
if (!m_bindingQueue.TryDequeue(out binding))
{
throw new Exception("Could not access binding");
}
var baseTime = (float)m_perfWatch.ElapsedTicks / Stopwatch.Frequency * 1000f;
// Bind input image
await binding.SetInputImageAsync(frame);
// Record bind time for display
resultItem.BindTime = (float)m_perfWatch.ElapsedTicks / Stopwatch.Frequency * 1000f - baseTime;
// Display image and results
await Dispatcher.RunAsync(
CoreDispatcherPriority.Normal,
async() =>
{
await resultItem.UpdateResultItemImageAsync(frame.SoftwareBitmap);
});
// Evaluate binding (fire and forget)
var evalTask = Task.Run(() => EvaluateBinding(binding, resultItem));
}
catch (Exception ex)
{
NotifyUser(ex.Message, NotifyType.ErrorMessage);
if (binding != null)
{
m_bindingQueue.Enqueue(binding);
}
m_bindingLock.Release();
m_imageToProcessTotal--;
await UIProgressMaxValue.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() => UIProgressMaxValue.Text = m_imageToProcessTotal.ToString());
}
});
}
// Enable UI
UIOptionPanel.IsEnabled = true;
UIButtonFilePick.IsEnabled = true;
UIHashTagBrowser.IsEnabled = true;
UIClearFilterButton.IsEnabled = true;
UIFilterPanel.Visibility = Visibility.Visible;
UIExecutionProgressRing.Visibility = Visibility.Collapsed;
UIExecutionProgressRing.IsActive = false;
}
/// <summary>
/// Evaluate the specified ConceptTaggerBinding and update the specified ResultItem with the outcome
/// </summary>
/// <param name="binding"></param>
/// <param name="resultItem"></param>
/// <returns></returns>
private async Task EvaluateBinding(ConceptTaggerBinding binding, ResultItemUserControl resultItem)
{
// Take a lock for using a skill if one is available, or wait if not
m_evaluationLock.Wait();
ConceptTaggerSkill skill = null;
try
{
if (!m_skillQueue.TryDequeue(out skill))
{
throw new Exception("Could not access skill");
}
var baseTime = (float)m_perfWatch.ElapsedTicks / Stopwatch.Frequency * 1000f;
// Evaluate binding
await skill.EvaluateAsync(binding);
// Record evaluation time for display
resultItem.EvalTime = (float)m_perfWatch.ElapsedTicks / Stopwatch.Frequency * 1000f - baseTime;
m_skillQueue.Enqueue(skill);
m_evaluationLock.Release();
}
catch (Exception ex)
{
NotifyUser(ex.Message, NotifyType.ErrorMessage);
if (binding != null)
{
m_bindingQueue.Enqueue(binding);
}
m_bindingLock.Release();
if (skill != null)
{
m_skillQueue.Enqueue(skill);
}
m_evaluationLock.Release();
return;
}
m_imageProcessedCount++;
// Attempt to obtain top 5 concept tags identified in image that scored a confidence of above 0.7
var result = binding.GetTopXTagsAboveThreshold(m_topX, (float)m_threshold);
m_bindingQueue.Enqueue(binding);
m_bindingLock.Release();
if (result != null)
{
foreach (var conceptTag in result)
{
m_hashTags.Add(conceptTag);
}
}
// Display image and results
await UIResultPanel.Dispatcher.RunAsync(
CoreDispatcherPriority.Normal,
() =>
{
resultItem.UpdateResultItemScore(result);
UITotalTime.Content = $"{((float)m_perfWatch.ElapsedTicks / Stopwatch.Frequency - m_e2eRunTime)}s";
UIProgressTick.Text = m_imageProcessedCount.ToString();
// Refresh the set of hashtag filters in the UI if we reached the end
if (m_imageProcessedCount == m_imageToProcessTotal)
{
UIHashTagBrowser.ItemsSource = null;
UIHashTagBrowser.ItemsSource = m_hashTags;
}
});
}