/// <summary>
/// Parses and saves recognition result for image
/// </summary>
/// <param name="results">Recognition results recieved from omr core</param>
/// <param name="item">The preview image that was recognized</param>
private void ProcessResult(string results, ImagePreviewViewModel item)
{
ObservableCollection <RecognitionResult> recognitionResults = this.ParseAnswers(results);
item.RecognitionResults = recognitionResults;
this.OnPropertyChanged(nameof(this.RecognitionResults));
}
/// <summary>
/// Cancel recognition for selected image
/// </summary>
/// <param name="itemToCancel">Image to cancel recognition for</param>
private void CancelSelectedImageRecognition(ImagePreviewViewModel itemToCancel)
{
if (itemToCancel.CanCancel)
{
itemToCancel.IsProcessing = false;
}
}
/// <summary>
/// Loads preview images by provided file paths
/// </summary>
/// <param name="files">File paths</param>
private void LoadPreviewImages(string[] files)
{
if (files.Length == 0)
{
return;
}
foreach (string file in files)
{
FileInfo fileInfo = new FileInfo(file);
if (!ResolutionUtility.CheckImageSize(fileInfo))
{
continue;
}
// load image metadata to check width and height
var bitmapFrame = BitmapFrame.Create(new Uri(file), BitmapCreateOptions.DelayCreation, BitmapCacheOption.None);
if (bitmapFrame.PixelWidth < 1200 || bitmapFrame.PixelHeight < 1700)
{
DialogManager.ShowImageSizeWarning();
}
var newItem = new ImagePreviewViewModel(file, Path.GetFileName(file), fileInfo.Length);
newItem.ImageFileFormat = fileInfo.Extension;
this.PreviewImages.Add(newItem);
}
this.InitialPreviewPanelVisibility = Visibility.Collapsed;
this.SelectedPreviewImage = this.PreviewImages.First();
}
/// <summary>
/// Loads single preview image from specified path
/// </summary>
/// <param name="pathToImage"></param>
private void LoadPreviewImage(string pathToImage)
{
FileInfo fileInfo = new FileInfo(pathToImage);
if (!ResolutionUtility.CheckImageSize(fileInfo))
{
return;
}
// load image metadata to check width and height
BitmapFrame bitmapFrame = BitmapFrame.Create(new Uri(pathToImage), BitmapCreateOptions.DelayCreation, BitmapCacheOption.None);
if (bitmapFrame.PixelWidth < 1200 || bitmapFrame.PixelHeight < 1700)
{
DialogManager.ShowImageSizeWarning(fileInfo.Name);
}
var newItem = new ImagePreviewViewModel(pathToImage, Path.GetFileName(pathToImage), fileInfo.Length);
newItem.ImageFileFormat = fileInfo.Extension;
this.PreviewImages.Add(newItem);
this.InitialPreviewPanelVisibility = Visibility.Collapsed;
this.CurrentStage = ResultProcessingStages.GotImagesToRecognize;
}
/// <summary>
/// Performs recognition for provided image
/// </summary>
/// <param name="itemToProcess">Image to process</param>
private void RecognizeImageRoutine(ImagePreviewViewModel itemToProcess)
{
// check if image was already processed
if (itemToProcess.IsProcessed)
{
// ask user confirmation
if (!DialogManager.ShowConfirmDialog(
string.Format("Image {0} was already recognized. Are you sure you want to run recognition again?",
itemToProcess.Title)))
{
// if no confirmation, clean up and return
itemToProcess.IsProcessing = false;
itemToProcess.StatusText = string.Empty;
return;
}
}
itemToProcess.CanCancel = false;
itemToProcess.StatusText = "Preparing for dispatch...";
var image = new BitmapImage(new Uri("file://" + itemToProcess.PathToImage));
byte[] imageData = TemplateSerializer.CompressImage(image, itemToProcess.ImageSizeInBytes);
//string imageData = TemplateConverter.CheckAndCompressImage(image, itemToProcess.ImageFileFormat, itemToProcess.ImageSizeInBytes);
string additionalPars = string.Empty;
itemToProcess.StatusText = "Core processing...";
try
{
string result = CoreApi.RecognizeImage(itemToProcess.Title,
imageData,
this.templateId,
itemToProcess.WasUploaded,
additionalPars);
Application.Current.Dispatcher.Invoke(() =>
{
this.ProcessResult(result, itemToProcess);
// update item states
itemToProcess.WasUploaded = true;
itemToProcess.IsProcessing = false;
itemToProcess.StatusText = string.Empty;
itemToProcess.CanCancel = true;
});
}
catch (Exception e)
{
// clean up in case of exception
itemToProcess.IsProcessing = false;
itemToProcess.StatusText = string.Empty;
itemToProcess.CanCancel = true;
DialogManager.ShowErrorDialog(e.Message);
}
}
/// <summary>
/// Parses and saves recognition result for image
/// </summary>
/// <param name="results">Recognition results recieved from omr core</param>
/// <param name="item">The preview image that was recognized</param>
private void ProcessResult(ImageRecognitionResult results, ImagePreviewViewModel item)
{
ObservableCollection <RecognitionResult> recognitionResults = this.ParseAnswers(results.RecognizedAnswers);
item.RecognitionResults = recognitionResults;
item.ClippedAreas = new ObservableCollection <ClippedArea>();
foreach (var clippedArea in results.ClippedAreas)
{
item.ClippedAreas.Add(new ClippedArea(clippedArea.Key, clippedArea.Value));
}
this.OnPropertyChanged(nameof(this.RecognitionResults));
this.OnPropertyChanged(nameof(this.ClippedAreas));
}
/// <summary>
/// Recognize single selected image
/// </summary>
/// <param name="imagePreview">Item to recognize</param>
private void RecognizeSelectedImage(ImagePreviewViewModel imagePreview)
{
var itemToProcess = imagePreview ?? this.SelectedPreviewImage;
BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += (sender, args) =>
{
this.RecognizeImageRoutine(itemToProcess);
};
itemToProcess.IsProcessing = true;
itemToProcess.StatusText = "Waiting...";
worker.RunWorkerAsync();
}
/// <summary>
/// Performs recognition for provided image
/// </summary>
/// <param name="itemToProcess">Image to process</param>
private void RecognizeImageRoutine(ImagePreviewViewModel itemToProcess)
{
// check if image was already processed
if (itemToProcess.IsProcessed)
{
// ask user confirmation
if (!DialogManager.ShowConfirmDialog(
string.Format("Image \"{0}\" was already recognized. Are you sure you want to run recognition again?",
itemToProcess.Title)))
{
// if no confirmation, clean up and return
itemToProcess.IsProcessing = false;
itemToProcess.StatusText = string.Empty;
return;
}
}
itemToProcess.CanCancel = false;
itemToProcess.StatusText = "Preparing for dispatch...";
if (!File.Exists(itemToProcess.PathToImage))
{
DialogManager.ShowErrorDialog("Could not find image " + "\"" + itemToProcess.PathToImage + "\".");
return;
}
byte[] imageData = this.PreprocessImage(itemToProcess.PathToImage, this.SelectedPreprocessingConfiguration);
string additionalPars = string.Empty;
itemToProcess.StatusText = "Recognizing...";
try
{
ImageRecognitionResult result =
CoreApi.RecognizeImage(itemToProcess.Title,
imageData,
this.templateId,
itemToProcess.WasUploaded,
additionalPars);
Application.Current.Dispatcher.Invoke(() =>
{
this.ProcessResult(result, itemToProcess);
// update item states
itemToProcess.WasUploaded = true;
itemToProcess.IsProcessing = false;
itemToProcess.StatusText = string.Empty;
itemToProcess.CanCancel = true;
itemToProcess.RecognitionError = false;
});
}
catch (Exception e)
{
// clean up in case of exception
itemToProcess.IsProcessing = false;
itemToProcess.StatusText = string.Empty;
itemToProcess.CanCancel = true;
itemToProcess.RecognitionError = true;
Application.Current.Dispatcher.Invoke(() =>
{
DialogManager.ShowErrorDialog(e.Message);
});
}
}
