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 Draw Rectangle over the video show in imagenenview		  New Topic  Reply to Topic
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hamed1234

5 Posts
Posted - Aug 29 2020 :  07:02:55  Show Profile  Reply
Hi,
Can I Draw rectangle/rectangles over the Imageenview when it showing a video or connected to a camera?
I want to detect some area and draw rectangle(s) whit color borders.

xequte

38616 Posts
Posted - Aug 30 2020 :  17:24:03  Show Profile  Reply
Hi

Yes, you can either draw to the canvas after the video content has been assigned to it, or you add a shape layer and move it as required.

Please take a look at how it is done in the demo:

\Demo\IEVision\TrackObjects\TrackObjects.dpr

Nigel
Xequte Software
www.imageen.com
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hamed1234

5 Posts
Posted - Sep 03 2020 :  07:27:05  Show Profile  Reply
Thank you xequte,
I tried to use canvas but It did not work . I use this in button event :

ImageEnView1.BackBuffer.Canvas.Pen.Width := 1;
ImageEnView1.BackBuffer.Canvas.Pen.Color := clRed;
ImageEnView1.BackBuffer.Canvas.Pen.Style := psSolid;
ImageEnView1.BackBuffer.Canvas.MoveTo(10, 10);
ImageEnView1.BackBuffer.Canvas.LineTo(100, 100);
ImageEnView1.Update;

Can you please tell me my mistake?
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xequte

38616 Posts
Posted - Sep 04 2020 :  18:38:59  Show Profile  Reply
Hi

The back buffer is likely cleared by the video frame. Did you look at the code in the TrackObjects.dpr demo?

Nigel
Xequte Software
www.imageen.com
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