Sightly OT re creating new stamp

BarryH · Post by **BarryH** » Sat May 10, 2008 6:51 pm

Hi all

At last! I can now create and use my own stamps, thank you!

I already have a number of scanned in images such as my signature that I would like to use, all different formats, TIFF, GIF, BMP, etc.

I would like to make the background transparent on some stamps, such as my signature.

Can anyone offer any suggestions to the best file format to support transparent backgrounds?

Bhikkhu Pesala · Post by **Bhikkhu Pesala** » Sat May 10, 2008 7:20 pm

GIF or PNG are best for transparency, but stamps don't seem to support it at the moment.

BarryH · Post by **BarryH** » Sat May 10, 2008 8:25 pm

The built in stamps seem to be transparent, aren't they?

Bhikkhu Pesala · Post by **Bhikkhu Pesala** » Sun May 11, 2008 7:15 am

The built-in stamps are vector images, which is not the same as a transparent GIF or PNG. Zoom in really close and you can see the difference.

Sun May 11, 2008 9:37 am

Stamps support transparency if it was in original image, so you need to create image with transparency. Recommended format is PNG, however GIF should also work.
And if toy need vector stamp - you may create PDF file with required content and then import it into stamps.

Bhikkhu Pesala · Post by **Bhikkhu Pesala** » Sun May 11, 2008 10:41 am

Lzcat wrote:Stamps support transparency if it was in original image, so you need to create image with transparency.

Neither GIF nor PNG retain their transparency when imported as stamps.

Sun May 11, 2008 10:54 am

Can you send us any of GIF/PNG file which has transparency but loss it when used as a stamp ?

BarryH · Post by **BarryH** » Sun May 11, 2008 12:32 pm

AFAIK this is a transparent PNG that isn't transparent in the viewer.

Podhorny · Post by **Podhorny** » Sun May 11, 2008 12:50 pm

Your image IS NOT transparent.
Please see transparent file in attachement.

Jiri

Sun May 11, 2008 1:19 pm

Confirm, Test Stamp.png isn't transparent, when Test Stamp Trans.png is. And stamp created from Test Stamp Trans.png is transparent too.

Bhikkhu Pesala · Post by **Bhikkhu Pesala** » Sun May 11, 2008 2:52 pm

Here are two transparent images that don't seem to work as stamps.

Chindit BW.png is a 1-bit PNG image

Aimlogo.gif is a 16 colour GIF image.

Increasing the PNG to 16 colours works OK.
Saving the GIF image as a 16 colour PNG also works OK.

Sun May 11, 2008 3:03 pm

Sorry, for now transparency works fine for images with alpha channel, but not for images with transparent color. Both supplied images use transparent colors, not alpha channel, so they are treated as solid.

Bhikkhu Pesala · Post by **Bhikkhu Pesala** » Sun May 11, 2008 3:07 pm

Thanks for the response. That's good enough for now as I have a work around. PDF-XChange is getting better and better.

Podhorny · Post by **Podhorny** » Mon May 12, 2008 9:53 am

I think that using transparent color is old technique, new applications use Alpha channels.
I am not profi in graphic, not using Adobe Photoshop or similar 'huge' applications.
For my need best fit freeware 'Active Pixels 2' from http://idea-systems.net/ (just 8 MB installation file).

Making transparent images wit this sw is easy - just open, go to main menu -> 'Image' -> 'Auto tranparency' and save.

Sorry for this advertisement, but may be helpful for somebody.

Best Regards,
Jiri