This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.
#1
Posted
:
Thursday, December 2, 2010 5:30:20 AM(UTC)
Groups: Registered
Posts: 10
Hello,
I would appreciate your help on knowing how to draw lines on image while capturing. These lines should be overlayed over live video image.
Thank you very much,
#2
Posted
:
Sunday, December 5, 2010 4:27:59 AM(UTC)
Groups: Guests
Posts: 3,022
Was thanked: 2 time(s) in 2 post(s)
You can try to use the LEAD Video Callback filter which will call a method on a user callback interface each time it receives a frame. This can be used to retrieve the image data for each frame and you can then use image processing (for example our Imaging toolkits) to draw on the stream.
There are Video Callback demos for different languages. They are installed here:
VB.NET:
LEADTOOLS17\Examples\Ltmm\Dotnet\VB\DrawOnVideo
C#:
LEADTOOLS17\Examples\Ltmm\Dotnet\CS\DrawOnVideo
C++:
LEADTOOLS17\Examples\Ltmm\Cpp\Callback
Visual Basic 6:
LEADTOOLS17\Examples\Ltmm\VB\CallBack
The details depend on which LEADTOOLS version (15, 16, etc.) and programming language you are using.
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