Annotate JPG Images using C#

AnnotateJPG_CSharp.md

Learn how to Annotate JPG Images using C#: https://blog.conholdate.com/2021/07/13/annotate-jpg-images-using-csharp/

The following topics are covered here:

1. Add Multiple Annotations to JPG Images
2. Add Area Annotation to JPG Images
3. Add TextField Annotation to JPG Images
4. Add Watermark Annotation to JPG Images

AnnotateJPG_CSharp_AddArea.cs

// intialize annotator
Annotator annotator = new Annotator("C:\\Files\\sample.jpg");

// define area annotation
AreaAnnotation area = new AreaAnnotation();
area.BackgroundColor = 65535;
area.Box = new Rectangle(80, 575, 310, 50);
area.CreatedOn = DateTime.Now;
area.Opacity = 0.7;
area.PageNumber = 0;
area.PenColor = 65535;
area.PenStyle = PenStyle.Dot;
area.PenWidth = 3;

// add area annotation
annotator.Add(area);

// save the output file
annotator.Save("C:\\Files\\result.jpg");

AnnotateJPG_CSharp_AddMultiple.cs

// intialize annotator
Annotator annotator = new Annotator("C:\\Files\\sample.jpg");

List<AnnotationBase> annotations = new List<AnnotationBase>();

// define and add arrow annotation
ArrowAnnotation arrow = new ArrowAnnotation
{
    Box = new Rectangle(100, 100, 100, 100),
    CreatedOn = DateTime.Now,
    Opacity = 0.7,
    PenColor = 16777215,
    PenStyle = PenStyle.DashDotDot,
    PenWidth = 5
};
annotations.Add(arrow);

// define and add distance annotation
DistanceAnnotation distance = new DistanceAnnotation
{
    Box = new Rectangle(75, 545, 315, 0),
    CreatedOn = DateTime.Now,
    Opacity = 0.7,
    PenColor = 65535,
    PenStyle = PenStyle.Solid,
    PenWidth = 9
};
annotations.Add(distance);

// define and add ellipse annotation
EllipseAnnotation ellipse = new EllipseAnnotation
{
    BackgroundColor = 65535,
    Box = new Rectangle(150, 300, 100, 100),
    CreatedOn = DateTime.Now,
    Opacity = 0.3,
    PenColor = 65535,
    PenStyle = PenStyle.Dot,
    PenWidth = 3
};
annotations.Add(ellipse);

// define and add point annotation
PointAnnotation point = new PointAnnotation
{
    Box = new Rectangle(75, 605, 10, 10),
    CreatedOn = DateTime.Now,
};
annotations.Add(point);

// add annotations to annotator
annotator.Add(annotations);

// save the output file
annotator.Save("C:\\Files\\result.jpg");

AnnotateJPG_CSharp_AddText.cs

// intialize annotator
Annotator annotator = new Annotator("C:\\Files\\sample.jpg");

// define text field annotation
TextFieldAnnotation textField = new TextFieldAnnotation();
textField.Box = new Rectangle(130, 120, 270, 30);
textField.CreatedOn = DateTime.Now;
textField.Text = "Document Automation APIs";
textField.FontColor = 16777215;
textField.FontSize = 12;
textField.Opacity = 1;
textField.PenStyle = PenStyle.Dot;
textField.PenWidth = 3;
textField.FontFamily = "Arial";
textField.TextHorizontalAlignment = HorizontalAlignment.Center;

// add text field annotation
annotator.Add(textField);

// save the output file
annotator.Save("C:\\Files\\result.jpg");

AnnotateJPG_CSharp_AddWatermark.cs

// initialize annotator
Annotator annotator = new Annotator("C:\\Files\\sample.jpg");

// define watermark annotation
WatermarkAnnotation watermark = new WatermarkAnnotation();
watermark.Text = "This is a sample Watermark";
watermark.FontColor = 16777215;
watermark.FontSize = 22;
watermark.Opacity = 0.7;
watermark.HorizontalAlignment = HorizontalAlignment.Center;
watermark.VerticalAlignment = VerticalAlignment.Center;

// add watermark annotation
annotator.Add(watermark);

// save the output file
annotator.Save("C:\\Files\\result.jpg");