/// <summary>
/// Navigate through list of imagelabels for segments.
/// </summary>
/// <param name="imageLabels">List of imagelabels to navigate.</param>
/// <param name="navigationDirection">Direction of navigation</param>
/// <param name="currentIndex">Current index</param>
/// <returns>Imagelabel of navigation</returns>
public static ImageLabel Navigate(this IList <ImageLabel> imageLabels, ENavigationDirection navigationDirection, int currentIndex)
{
return(imageLabels.NavigateLabels(navigationDirection, currentIndex));
}
/// <summary>
/// Navigate through list of imagelabels for labels.
/// </summary>
/// <param name="imageLabels">List of imagelabels to navigate.</param>
/// <param name="navigationDirection">Direction of navigation</param>
/// <param name="currentIndex">Current index</param>
/// <returns>Imagelabel of navigation</returns>
private static ImageLabel NavigateLabels(this IList <ImageLabel> imageLabels, ENavigationDirection navigationDirection, int currentIndex)
{
switch (navigationDirection)
{
case ENavigationDirection.Direct:
return(imageLabels.ElementAtOrDefault(currentIndex));
case ENavigationDirection.Blank:
case ENavigationDirection.NextBlank:
return(imageLabels.NextUnlabeled(currentIndex));
case ENavigationDirection.Next:
return(imageLabels.ElementAtOrDefault(currentIndex + 1));
case ENavigationDirection.Previous:
return(imageLabels.ElementAtOrDefault(currentIndex - 1));
case ENavigationDirection.PreviousBlank:
return(imageLabels.PreviousUnlabeled(currentIndex));
case ENavigationDirection.LastBlank:
int?lastLabeledIndex = imageLabels.LastLabeledIndex();
return(imageLabels.ElementAtOrDefault(lastLabeledIndex.HasValue ? lastLabeledIndex.Value + 1 : 0));
}
throw new NotImplementedException();
}
public static IEnumerable <ImageLabel> ShrinkToBlankList(this IList <ImageLabel> imageLabels, ENavigationDirection navigationDirection, int currentIndex)
{
return(imageLabels.ShrinkToUnlabeledList(navigationDirection, currentIndex));
}
private static IEnumerable <ImageLabel> ShrinkToUnlabeledList(this IList <ImageLabel> imageLabels, ENavigationDirection navigationDirection, int currentIndex)
{
switch (navigationDirection)
{
case ENavigationDirection.Blank:
return(imageLabels.Where(o => !o.HasLabels));
case ENavigationDirection.NextBlank:
return(imageLabels.Skip(currentIndex + 1).Where(o => !o.HasLabels));
case ENavigationDirection.PreviousBlank:
return(imageLabels.Take(currentIndex).Where(o => !o.HasLabels));
}
throw new NotImplementedException();
}
/// <summary>
/// Shrink given list to list of images without additional elements (depends on labelmode).
/// For example: Shrink image list to list of images without labels in labelmode objectdetection.
/// </summary>
/// <param name="imageLabels">List of labels</param>
/// <param name="labelMode">Mode of navigation</param>
/// <param name="navigationDirection">Direction of navigation</param>
/// <param name="currentIndex">Current index of navigation</param>
/// <returns>Shrinked list</returns>
public static IEnumerable <ImageLabel> ShrinkToBlankList(this IEnumerable <ImageLabel> imageLabels, ELabelMode labelMode, ENavigationDirection navigationDirection, int currentIndex)
{
#region validation
if (imageLabels == null)
{
throw new ArgumentNullException(nameof(imageLabels));
}
#endregion
switch (navigationDirection)
{
case ENavigationDirection.Blank:
return(imageLabels.Where(HasNoElements(labelMode)));
case ENavigationDirection.NextBlank:
return(imageLabels.Skip(currentIndex + 1).Where(HasNoElements(labelMode)));
case ENavigationDirection.PreviousBlank:
return(imageLabels.Take(currentIndex).Where(HasNoElements(labelMode)));
}
throw new NotImplementedException();
}
/// <summary>
/// Navigate through list of imagelabels for segments.
/// </summary>
/// <param name="imageLabels">List of imagelabels to navigate.</param>
/// <param name="navigationDirection">Direction of navigation</param>
/// <param name="labelMode">Label mode</param>
/// <param name="currentIndex">Current index</param>
/// <returns>Imagelabel of navigation</returns>
public static ImageLabel Navigate(this IList <ImageLabel> imageLabels, ELabelMode labelMode, ENavigationDirection navigationDirection, int currentIndex)
{
#region validation
if (imageLabels == null)
{
throw new ArgumentNullException(nameof(imageLabels));
}
#endregion
switch (navigationDirection)
{
case ENavigationDirection.Direct:
return(imageLabels.ElementAtOrDefault(currentIndex));
case ENavigationDirection.Blank:
case ENavigationDirection.NextBlank:
return(imageLabels.Next(currentIndex, HasNoElements(labelMode)));
case ENavigationDirection.Next:
return(imageLabels.ElementAtOrDefault(currentIndex + 1));
case ENavigationDirection.Previous:
return(imageLabels.ElementAtOrDefault(currentIndex - 1));
case ENavigationDirection.PreviousBlank:
return(imageLabels.Previous(currentIndex, HasNoElements(labelMode)));
case ENavigationDirection.LastBlank:
int?lastIndex = imageLabels.LastIndex(HasElements(labelMode));
return(imageLabels.ElementAtOrDefault(lastIndex.HasValue ? lastIndex.Value + 1 : 0));
}
throw new NotImplementedException();
}
private ImageNavigationResultView GetImageLabelNavigationResult(Topic topic, NavigationParameter navigationParameter, ENavigationDirection navigationDirection)
{
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
sw.Start();
// fill imagelabel-structure of image label
ImageNavigationResult image = NavigationService.Navigate(topic, navigationParameter.Index, navigationParameter.LabelMode, navigationDirection);
// default navigation if not label was found on navigation to blank
if (image == null && (navigationDirection == ENavigationDirection.Blank || navigationDirection == ENavigationDirection.LastBlank))
{
image = NavigationService.Navigate(topic, navigationParameter.Index, navigationParameter.LabelMode, ENavigationDirection.Direct);
}
if (image == null)
{
// return http-404 if no label found
return(null);
}
// create naviation result
ImageNavigationResultView navigationResult = ImageNavigationResultFactory.CreateView(image);
switch (navigationParameter.LabelMode)
{
case ELabelMode.ObjectDetection:
if (image.ImageLabel.HasLabels)
{
IEnumerable <Label> labels = LabelService.GetLabels(topic, image.ImageLabel);
navigationResult.ImageLabel.Labels = labels.Select(LabelFactory.CreateView);
}
break;
}
sw.Stop();
Log.Information($"Navigation takes {sw.ElapsedMilliseconds} ms");
return(navigationResult);
}
private ActionResult Navigate(Topic topic, NavigationParameter navigationParameter, ENavigationDirection navigationDirection)
{
#region validation
CheckMandatoryParameter(nameof(navigationParameter), navigationParameter);
#endregion
// create naviation result
ImageNavigationResultView result = GetImageLabelNavigationResult(topic, navigationParameter, navigationDirection);
if (result != null)
{
return(Ok(result));
}
return(NotFound(Messages.ImageNotFound((uint)navigationParameter.Index)));
}
private ImageLabelNavigationResult GetImageLabelNavigationResult(Topic topic, NavigationParameter navigationParameter, ENavigationDirection navigationDirection)
{
// get list of all image labels
List <ImageLabel> imageLabels = this.ImageService.GetImageLabels(topic).ToList();
// fill imagelabel-structure of image label
ImageLabel navigationImageLabel = imageLabels.Navigate(navigationDirection, navigationParameter.Index);
if (navigationImageLabel == null)
{
// return http-404 if no label found
return(null);
}
// create naviation result
return(new ImageLabelNavigationResult
{
ImageLabel = this.ImageService.Navigate(topic, (uint)navigationImageLabel.Index),
ImageCount = imageLabels.Count,
HasNextBlank = imageLabels.HasNextBlank(navigationImageLabel),
HasNext = imageLabels.HasNext(navigationImageLabel),
HasPrevious = imageLabels.HasPrevious(navigationImageLabel),
HasPreviousBlank = imageLabels.HasPreviousBlank(navigationImageLabel)
});
}
public ImageNavigationResult Navigate(Topic topic, long startIndex, ELabelMode labelMode, ENavigationDirection navigationDirection)
{
#region valdiation
if (topic == null)
{
throw new ArgumentNullException(nameof(topic));
}
if (!Enum.IsDefined(typeof(ELabelMode), labelMode))
{
throw new ArgumentException(nameof(labelMode));
}
if (!Enum.IsDefined(typeof(ENavigationDirection), navigationDirection))
{
throw new ArgumentException(nameof(navigationDirection));
}
#endregion
return(ImageLabelNavigationRepository.GetNavigationResult(topic, startIndex, labelMode, navigationDirection));
}
public ImageNavigationResult GetNavigationResult(Topic topic, long startIndex, ELabelMode labelMode, ENavigationDirection navigationDirection)
{
#region valdiation
if (topic == null)
{
throw new ArgumentNullException(nameof(topic));
}
if (!Enum.IsDefined(typeof(ELabelMode), labelMode))
{
throw new ArgumentException(nameof(labelMode));
}
if (!Enum.IsDefined(typeof(ENavigationDirection), navigationDirection))
{
throw new ArgumentException(nameof(navigationDirection));
}
#endregion
// get list of all image labels
IList <ImageLabel> images = ImageRepository.GetImages(topic);
// fill imagelabel-structure of image label
ImageLabel image = images.Navigate(labelMode, navigationDirection, (int)startIndex);
return(CreateImageNavigationResult(topic, image, images, labelMode));
}
