/// <inheritdoc />
public override void Locate(PageShape page, Image image, Image originalImage, IList <Rectangle> areas, CancellationToken cancellationToken)
{
ISet <TextShape> texts = this.detector.FindText(image, page.EnumAllLines(), cancellationToken);
// add found lines to the image
page.AddShapes(texts);
}
/// <inheritdoc />
public override void Locate(PageShape page, Image image, Image originalImage, IList <Rectangle> areas, CancellationToken cancellationToken)
{
ISet <PictureShape> pictures = this.detector.FindPictures(image, cancellationToken);
// add found pictures to the image
page.AddShapes(pictures);
}
/// <summary>
/// Initializes a new instance of the <see cref="PageSource"/> class.
/// </summary>
/// <param name="id">The source of data.</param>
/// <param name="page">The <see cref="PageShape"/> object that contains the page data.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="id"/> is <b>null</b>.
/// </exception>
public PageSource(DataSourceId id, PageShape page)
: base(id)
{
this.Page = page;
}
/// <summary>
/// Initializes a new instance of the <see cref="PageSource"/> class.
/// </summary>
/// <param name="id">The unique identifier of the data.</param>
/// <param name="name">The name of the data.</param>
/// <param name="frameIndex">
/// The zero-based index for this data if it belongs to a multi-page file.
/// <b>null</b> if this data belongs to a single-page file.
/// </param>
/// <param name="page">The <see cref="PageShape"/> object that contains the page data.</param>
public PageSource(string id, string name, int?frameIndex, PageShape page)
: base(id, name, frameIndex)
{
this.Page = page;
}
/// <summary> /// Locates shapes on the specified <see cref="Image"/>. /// </summary> /// <param name="page">The <see cref="PageShape"/> that contains shapes previously found on the image and receives new shapes found by this locator..</param> /// <param name="image">The <see cref="Image"/> to locate shapes on. This image can be changed by locator.</param> /// <param name="originalImage">The <see cref="Image"/> to locate shapes on. This image is the copy of original image and remains unchanged.</param> /// <param name="areas">The areas on the <paramref name="image"/> to locate shapes in.</param> /// <param name="cancellationToken">The cancellationToken token used to notify the locator that operation should be canceled.</param> /// <remarks> /// Use this method to locate shapes of different types (i.e. lines, pictures, tables). /// </remarks> public abstract void Locate(PageShape page, Image image, Image originalImage, IList <Rectangle> areas, CancellationToken cancellationToken);
/// <summary>
/// Segments the <see cref="Image"/> into the specified <see cref="Shape"/> objects.
/// </summary>
/// <param name="image">An image to parse.</param>
/// <param name="areas">The areas on the <paramref name="image"/> to locate shapes in.</param>
/// <param name="cancellationToken">The cancellation token used to notify the <see cref="ImageSegmentation"/> that operation should be canceled.</param>
/// <returns>The <see cref="PageShape"/> object this method creates.</returns>
public PageShape Segment(Image image, IList <Rectangle> areas, CancellationToken cancellationToken)
{
if (image == null)
{
throw new ArgumentNullException(nameof(image));
}
// check if full image
if (areas != null && areas.Any() && Rectangle.Union(areas) == image.Bounds)
{
areas = null;
}
PageShape page = new PageShape(image.Bounds, image.HorizontalResolution, image.VerticalResolution);
Image originalImage = image.Clone(true);
foreach (LocatorTypes locatorType in ImageSegmentation.Types.Keys)
{
if (this.Locators.HasFlag(locatorType))
{
#if SESSION_DIAG
this.StartStopwatch();
#endif
LocatorBase locator = InitializeLocator(locatorType);
if (locatorType == LocatorTypes.LineLocator)
{
// always run line locator on full image
locator.Locate(page, image, originalImage, null, cancellationToken);
// delete found lines from the image
////LineLocator.DeleteLines(parameters.LineLocatorParameters, image, page.GetAllLines(), cancellationToken);
}
else
{
locator.Locate(page, image, originalImage, areas, cancellationToken);
}
#if SESSION_DIAG
this.StopStopwatch(locatorType.ToString());
#endif
}
cancellationToken.ThrowIfCancellationRequested();
}
return(page);
LocatorBase InitializeLocator(LocatorTypes locatorType)
{
if (!this.locators.TryGetValue(locatorType, out LocatorBase locator))
{
try
{
this.locators[locatorType] = locator = (LocatorBase)Activator.CreateInstance(
ImageSegmentation.Types[locatorType],
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
null,
new object[] { },
null);
}
catch (Exception e)
{
throw new InvalidOperationException("Cannot create locator.", e);
}
}
return(locator);
}
}
