VintaSoft Imaging .NET SDK 15.1: Документация для .NET разработчика
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Класс WpfHighlightTool
В этом разделе
Визуальный инструмент WpfHighlightTool предоставляет возможность отображать несколько наборов прямоугольных объектов в WpfImageViewer. Наборы определяются в системе координат изображения и могут отображаться разными цветами.


3 типа используются для подсветки объектов:
Вот код C#/VB.NET, который показывает, как отобразить 3 набора объектов красного, зеленого и синего цвета на изображении в WPF просмотрщике изображений:
public void AddRectanglesOnImageInImageViewer(Vintasoft.Imaging.UI.ImageViewer viewer)
{
    System.Random random = new System.Random();

    // create a set of random red rectangles
    Vintasoft.Imaging.UI.VisualTools.ColoredObjects<HightlightRectangle> redObjects =
        new Vintasoft.Imaging.UI.VisualTools.ColoredObjects<HightlightRectangle>(
            CreateRandomHightlightRectangles(random,
            viewer.Image.Width, viewer.Image.Height, 16));
    // set the brush for red rectangles
    redObjects.Brush = new System.Drawing.SolidBrush(
        System.Drawing.Color.FromArgb(128, 255, 0, 0));
    // set the pen for red rectangles
    redObjects.Pen = new System.Drawing.Pen(
        System.Drawing.Color.FromArgb(64, 0, 0, 0));
    
    // create a set of random green rectangles
    Vintasoft.Imaging.UI.VisualTools.ColoredObjects<HightlightRectangle> greenObjects =
        new Vintasoft.Imaging.UI.VisualTools.ColoredObjects<HightlightRectangle>(
            CreateRandomHightlightRectangles(random,
            viewer.Image.Width, viewer.Image.Height, 16));
    // set the brush for green rectangles
    greenObjects.Brush = new System.Drawing.SolidBrush(
        System.Drawing.Color.FromArgb(128, 0, 255, 0));
    // set the pen for green rectangles
    greenObjects.Pen = new System.Drawing.Pen(
        System.Drawing.Color.FromArgb(64, 0, 0, 0));

    // create a set of random blue rectangles
    Vintasoft.Imaging.UI.VisualTools.ColoredObjects<HightlightRectangle> blueObjects =
        new Vintasoft.Imaging.UI.VisualTools.ColoredObjects<HightlightRectangle>(
            CreateRandomHightlightRectangles(random,
            viewer.Image.Width, viewer.Image.Height, 16));
    // set the brush for blue rectangles
    blueObjects.Brush = new System.Drawing.SolidBrush(
        System.Drawing.Color.FromArgb(128, 0, 0, 255));
    // set the pen for blue rectangles
    blueObjects.Pen = new System.Drawing.Pen(
        System.Drawing.Color.FromArgb(64, 0, 0, 0));

    // create the visual tool for highlighting rectangles on image in image viewer
    Vintasoft.Imaging.UI.VisualTools.HighlightTool<HightlightRectangle> highlightTool = 
        new Vintasoft.Imaging.UI.VisualTools.HighlightTool<HightlightRectangle>();
    // add red rectangles to the visual tool
    highlightTool.Items.Add(redObjects);
    // add green rectangles to the visual tool
    highlightTool.Items.Add(greenObjects);
    // add blue rectangles to the visual tool
    highlightTool.Items.Add(blueObjects);

    // set the HighlightTool as the active visual tool in image viewer,
    // i.e. show the rectangles on image in image viewer
    viewer.VisualTool = highlightTool;
}

/// <summary>
/// Creates an array with random rectangles on image.
/// </summary>
private HightlightRectangle[] CreateRandomHightlightRectangles(
    System.Random random,
    int imageWidth,
    int imageHeight,
    int rectCount)
{
    HightlightRectangle[] objects = new HightlightRectangle[rectCount];
    for (int i = 0; i < rectCount; i++)
    {
        int x = random.Next(imageWidth);
        int y = random.Next(imageHeight);
        int width = random.Next(System.Math.Min(100, imageWidth - x));
        int height = random.Next(System.Math.Min(100, imageHeight - y));
        objects[i] = new HightlightRectangle(
            new System.Drawing.Rectangle(x, y, width, height));
    }
    return objects;
}

/// <summary>
/// A rectangle that must be highlighted on image in image viewer.
/// </summary>
public class HightlightRectangle : Vintasoft.Imaging.IBoundedObject
{

    System.Drawing.Rectangle _rect;



    public HightlightRectangle(System.Drawing.Rectangle rect)
    {
        _rect = rect;
    }



    public System.Drawing.Rectangle GetBoundingBox()
    {
        return _rect;
    }

}
Public Sub AddRectanglesOnImageInImageViewer(viewer As Vintasoft.Imaging.UI.ImageViewer)
    Dim random As New System.Random()

    ' create a set of random red rectangles
    Dim redObjects As New Vintasoft.Imaging.UI.VisualTools.ColoredObjects(Of HightlightRectangle)(CreateRandomHightlightRectangles(random, viewer.Image.Width, viewer.Image.Height, 16))
    ' set the brush for red rectangles
    redObjects.Brush = New System.Drawing.SolidBrush(System.Drawing.Color.FromArgb(128, 255, 0, 0))
    ' set the pen for red rectangles
    redObjects.Pen = New System.Drawing.Pen(System.Drawing.Color.FromArgb(64, 0, 0, 0))

    ' create a set of random green rectangles
    Dim greenObjects As New Vintasoft.Imaging.UI.VisualTools.ColoredObjects(Of HightlightRectangle)(CreateRandomHightlightRectangles(random, viewer.Image.Width, viewer.Image.Height, 16))
    ' set the brush for green rectangles
    greenObjects.Brush = New System.Drawing.SolidBrush(System.Drawing.Color.FromArgb(128, 0, 255, 0))
    ' set the pen for green rectangles
    greenObjects.Pen = New System.Drawing.Pen(System.Drawing.Color.FromArgb(64, 0, 0, 0))

    ' create a set of random blue rectangles
    Dim blueObjects As New Vintasoft.Imaging.UI.VisualTools.ColoredObjects(Of HightlightRectangle)(CreateRandomHightlightRectangles(random, viewer.Image.Width, viewer.Image.Height, 16))
    ' set the brush for blue rectangles
    blueObjects.Brush = New System.Drawing.SolidBrush(System.Drawing.Color.FromArgb(128, 0, 0, 255))
    ' set the pen for blue rectangles
    blueObjects.Pen = New System.Drawing.Pen(System.Drawing.Color.FromArgb(64, 0, 0, 0))

    ' create the visual tool for highlighting rectangles on image in image viewer
    Dim highlightTool As New Vintasoft.Imaging.UI.VisualTools.HighlightTool(Of HightlightRectangle)()
    ' add red rectangles to the visual tool
    highlightTool.Items.Add(redObjects)
    ' add green rectangles to the visual tool
    highlightTool.Items.Add(greenObjects)
    ' add blue rectangles to the visual tool
    highlightTool.Items.Add(blueObjects)

    ' set the HighlightTool as the active visual tool in image viewer,
    ' i.e. show the rectangles on image in image viewer
    viewer.VisualTool = highlightTool
End Sub

''' <summary>
''' Creates an array with random rectangles on image.
''' </summary>
Private Function CreateRandomHightlightRectangles(random As System.Random, imageWidth As Integer, imageHeight As Integer, rectCount As Integer) As HightlightRectangle()
    Dim objects As HightlightRectangle() = New HightlightRectangle(rectCount - 1) {}
    For i As Integer = 0 To rectCount - 1
        Dim x As Integer = random.[Next](imageWidth)
        Dim y As Integer = random.[Next](imageHeight)
        Dim width As Integer = random.[Next](System.Math.Min(100, imageWidth - x))
        Dim height As Integer = random.[Next](System.Math.Min(100, imageHeight - y))
        objects(i) = New HightlightRectangle(New System.Drawing.Rectangle(x, y, width, height))
    Next
    Return objects
End Function

''' <summary>
''' A rectangle that must be highlighted on image in image viewer.
''' </summary>
Public Class HightlightRectangle
    Implements Vintasoft.Imaging.IBoundedObject

    Private _rect As System.Drawing.Rectangle



    Public Sub New(rect As System.Drawing.Rectangle)
        _rect = rect
    End Sub



    Public Function GetBoundingBox() As System.Drawing.Rectangle Implements Vintasoft.Imaging.IBoundedObject.GetBoundingBox
        Return _rect
    End Function

End Class


Примеры использования визуального инструмента в демо приложениях

Демо приложение "Image Processing Demo" содержит визуальный инструмент HighlightTool, который используется для выделения некоторых областей изображения после выполнения сегментации изображения.

Демо приложение "OCR Demo" содержит визуальный инструмент HighlighTool, который используется для выделения распознанных слов после выполнения распознавания текста.