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#1 Posted : Wednesday, November 19, 2014 8:19:39 PM(UTC)

arg  
arg

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Posts: 4


I scaned images in my app, and show in RasterImageViewer.

I want to add text to image and save in it.

How to add text to image in RasterImageViewer?
 

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#2 Posted : Friday, November 21, 2014 12:26:52 PM(UTC)

JustinM  
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Arg,

What version of LEADTOOLS are you currently using? Also, which framework are you working in? If you are working with CDLL, C++ Class Library, or Winforms you can use the GDI to write text directly to the image.
 
#3 Posted : Friday, November 21, 2014 6:50:45 PM(UTC)

arg  
arg

Groups: Registered
Posts: 4


I uae :
LEADTOOLS 18
.net 4.5
wpf
 
#4 Posted : Sunday, November 23, 2014 12:41:44 AM(UTC)
Maen Hasan

Groups: Registered, Tech Support
Posts: 1,328

Was thanked: 1 time(s) in 1 post(s)

You can programmatically add a text annotation object to the image by using the following code:
============
AnnTextObject text = new AnnTextObject();
text.Stroke = AnnStroke.Create(AnnSolidColorBrush.Create("Red"), LeadLengthD.Create(2));
text.Font = new AnnFont("Arial", 2);
text.Font.FontStyle = AnnFontStyle.Normal;
text.Font.FontWeight = AnnFontWeight.Bold;
text.Font.FontStretch = AnnFontStretch.Normal;
text.TextForeground = AnnSolidColorBrush.Create("yellow");
text.Font.TextDecoration = AnnTextDecorations.Underline;
text.Fill = AnnSolidColorBrush.Create("transparent");
LeadRectD TextRect  = new LeadRectD(10,10,200,200);
text.Rect = _activeAutomation.Container.Mapper.RectToContainerCoordinates(TextRect);
text.Text = "This TEXT is for Test";
text.HorizontalAlignment = AnnHorizontalAlignment.Center;
text.VerticalAlignment = AnnVerticalAlignment.Center;
text.TextRotate = AnnTextRotate.Rotate0;
_activeAutomation.Container.Children.Add(text);
UpdateLayout();
_activeAutomation.Invalidate(LeadRectD.Empty);
============

After this, you can burn the annotation object to the image by using the AnnWPFRenderingEngine.BurnToRectWithDpi() method.
For a sample code, please refer to the C# WPF annotation demo that ships with the LEADTOOLS v18 SDK. You can find the demo's source code here:
[LEADTOOLS 18 folder]\Examples\DotNet3\CS\AnnotationsDemo
Specially check the code under the _miAnnotationsRealize_Click event.

Thanks,
Maen Badwan
LEADTOOLS Technical Support
 
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