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Graphics Problem

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URL: https://forums.webwiz.net/forum_posts.asp?TID=9831
Printed Date: 31 March 2026 at 11:59am
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Topic: Graphics Problem
Posted By: huwnet
Subject: Graphics Problem
Date Posted: 15 February 2004 at 1:22pm
I am having a little graphics problem. Here is what I am trying to do:


1. Make a logo in Adobe or similar graphics program. Unless your logo is a solid square, you will need to open a alpha channel.

There are 2 ways to do this.

  • use a black background
  • create a separate picture with grey as an alpha channel

The first method is the easiest. If you have any other black in the logo, that'll disappear using this method.  The second method requires making two images, both this same size.  Use grey in areas that you want transparent on the first image.  Save the images as a targa (tga) or bitmap (bmp).

I am trying to do the first method and saving it as a bmp file. The program does not seem to accept TGA files whatever it says. The image attributes are Width 375 Height 288. The file that I am adding to the back background is: http://www.huwnet.org.uk/images/shuwnet.jpg . The logo should go at the bottom right. I have tried doing this the simple way in MSpaint but the virtual dub program does not seem to like it. I have no advanced graphics programes so if anyone could help I would be very grateful.





Replies:
Posted By: huwnet
Date Posted: 15 February 2004 at 4:44pm
Could anyone help/do this for me?? 


Posted By: dpyers
Date Posted: 15 February 2004 at 9:03pm
I'm not sure what you're trying to do with the logo. Are you trying to make it semi-transparent?

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Lead me not into temptation... I know the short cut, follow me.


Posted By: Diep-Vriezer
Date Posted: 16 February 2004 at 2:55pm
Adobe supports layers and opacity. First design the logo, then, if you want the background color to be part of the logo, use the alpha channel.

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Gone..


Posted By: huwnet
Date Posted: 17 February 2004 at 4:44am
OK! I don't have adobe :( Is there any other way of doing it? The logo I mentioned in my first post is going to be bottom right and the background when you make it black should not come out when it has been dubbed.


Posted By: dpyers
Date Posted: 17 February 2004 at 5:28am
I still don't know what you're trying to do with the logo other than to add an alpha channel to it.

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Lead me not into temptation... I know the short cut, follow me.


Posted By: huwnet
Date Posted: 17 February 2004 at 5:39am
Well I don't really understand myself. I am trying to add my logo to a film (.avi) using Virtual Dub. You create a black alpha chanel. You add the logo to the bottom right. Then when you add it the program will make the alpha channel transparent so you only see the logo.


Posted By: Diep-Vriezer
Date Posted: 17 February 2004 at 10:17am
Don't know if AVI and alpha channel PNG's are combined that well...

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Gone..


Posted By: huwnet
Date Posted: 18 February 2004 at 4:24am
LOL! I am not mixing this myself. It goes through a free program called virtual dub. I would love to do this myself but I do not have adobe photoshop etc.



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