Overlay functionality sample code in C#

Hi,

I'm using LeadTools 14.5.

I would like to set overlay of one tif image over an another tif image.

The overlay image should appear as transparent. So, that I can see the underneeth image details also.

Kindly send me a sample code in C# explaining the same.

I couldn't find any solutions for my requirement in the forum as well as in the examples.

Thanks.

Could you tell me what exactly do you intend to set as a
transparent part of the images? Is it a single color (e.g. background), or a 'mask' such as alpha channel, or a region of interest?
Also, could you tell me what LEADTOOLS programming interface
(OCX, COM or .NET Class Library) are you using, since all three can be used with C#?

Hi,

I'm using .NET Class Libraries.

I want to see the entire rasterImageViewer control's image through the overlay image.

(i.e) Once I set the overlay image through SetOverlayImage method for a rasterImageViewer1.Image, the rasterImageViewer control's image should be clearly visible to me through the overlay image.

Kindly let me know, if you need any more details. And also it will be great, if you can send me the sample images along with the sample code.

Thanks.

Jeb,

The overlay images are documented in the .NET help file, and you can get more information by reading the topic "Overlay Overview".

In particular, the part of the overlay that has pixel values of 0 will be transparent, and the non-zero pixels will be opaque.
Is this the kind of transparency you're trying to implement?

About sample images, the toolkit has some images installed
in the LEADTOOLS\Images folder, but there's only one image related to overlays,
and that image is a Medical DICOM data set. You normally test with your own images to get the result you want your application to display.

Adnan,

I read through the documentation and with the sample code available in that I couldn't derive my expected result.

You are exactly correct. I'm expecting the same kind of functionality. Can you help me by sending the piece of code required for that functionality?

Thanks.

Attached is a simple application that loads an image and an
overlay.  The overlay is displayed over the image.  It is in
.NET 2005.  You will need to update the
RasterCodecs.CodecsPath  as well as the Reference Path in the project's settings to match those on your machine.

Thanks Travis.

It sounds good and I appreciate your response.

 

With regards,

 - Jeb

any exemple for the version 15 ?

Attached is the same sample in version 15.

Thanks you it ask me for leadtools reference in visual sutdio I've only multimedia trial sdk.

This sample is showing how to use an overlay on our RasterObjects.  Are you wanting to overlay an image over video or overlay video over video?  If so, I know we are working on a sample now showing how to do that.  I can post again once this sample is available. 

Otherwise if you're wanting to overlay an image over another image, you'll need to download our Raster Imaging Pro tool kit in order to get the .NET DLLs necessary to run this sample. 

Please follow this link to download the evaluation:
http://www.leadtools.com/Survey/WebEvalSurvey.asp?category=Raster

I just want to overlay text or line on video capture control and I want this overlay keeping in my video saving file

If you just want text displayed on the screen but not drawn on the video data, then an overlay is what you would want.  However, you want the data to be drawn on the video, so you would want to use the Callback filter. 

The Callback filter gives you a pointer to the data of each frame captured (or previewed) before it is displayed in the control.  You can then take this data and alter it however you want.  In your case you'll draw text on the data.  It will then be displayed in the viewer and written to disk when capturing. 

We ship an example showing you how to use the Callback filter.
VB:
\Program Files\LEAD Technologies\LEADTOOLS 15\Examples\ltmm\VB\CallBack
VC:
\Program Files\LEAD Technologies\LEADTOOLS 15\Examples\ltmm\Cpp\Callback

I've seen this example but I work with c# and I don't find the way to use this example.
which reference I need in my visual studio project ?

It seems that you already started another thread about this:
http://support.leadtools.com/SupportPortal/cs/forums/22830/ShowPost.aspx

Please see that thread.