light boxes around .jpg in exported PDF files.

[Artworx]

Sometimes, in exported PDF files light or faint boxes appear around .jpg or .png that have placed on top of other .jpg in a file. How can I eliminate this behavior?? Thanks, Lew.

[gwpriester]

Can you post an example of what you are describing.

[Boy]

Sometimes, in exported PDF files light or faint boxes appear around .jpg or .png that have placed on top of other .jpg in a file. How can I eliminate this behavior?? Thanks, Lew.

Do these images have transparency or shadows applied to them?

[Fin]

I can confirm this. The transparent rectangle slightly changes the color of the layer behind it. This never shows on-screen, only when printed out. All my print-outs are pdf files. There are two things this depends on: The color of the background--most colors won't show this problem, and the printer itself; some show it, others won't. Have never found a solution.

Oh, and these aren't jpgs or pngs laid on each other, they are xara cartoons exported to pdf files.

[Egg Bramhill]

Sounds like an integers issue. Ensure your image dimensions are in whole pixel numbers, not containing decimal dimensions. But as Gary says please post an example.

[Fin]

Thanks, Egg. Sorry, my wording was ambiguous. My vector artwork has no rectangle behind it, I meant the transparent rectangular bounding box that's created when the file is exported to pdf (which of course converts the artwork to bitmap). It's an alpha channel thing, I suppose. When it happens, it looks like the bounding box is 99% transparent. A light green background will show a very slightly but noticeable darker green box. This problem use to occur a lot on my old printer but only once in hundreds of files on my new printer. That means I won't be able to easily find a "guilty" file to post here. I print to good machines, btw, several thousand dollars.

[Egg Bramhill]

I've never noticed this but to avoid it happening I'd ensure your images are whole pixels and on whole pixel co-ordinates.

[gwpriester]

I have seen this before. What happens if you create a bitmap copy of the problem image? And if the bitmap does not have transparency? This might solve the problem.

[Artworx]

The boxes appear randomly around .png with transparent backgrounds that were created in Photoshop. Sometimes .jpg with no transparency also show up with boxes in the exported .pdf. I never know in advance when this will happen. Thanks for you comments and help! Lew

[Boy]

So, yes, definitely a transparency issue. Try exporting the .png files from Xara and then place these on top of the background picture.