Dear Corel UsersWhen I trace an image in CorelDRAW (v15), I get of course a banding of colors, but unfortunately the regions with different colors are displayed with very thin white lines as borders. This look is retained when published to pdf. How can I get rid of these white borders?
I attach a photo for you to see ...
Regards,
Erik
Helo Erik; I guess one way would be to brake the object a part and delete or change the color to match the color next to it. I think you could use the eye dropper tool to get the color you want to use.
George
Hi.
This macro will fix it. After trace select result and run.
http://www.gdgmacros.com/helpful_vba_code_details.php?codeID=3
~John
Thanks Alex! It actually works perfectly when the objects are doublicated! Easy to do too. Great! The only drawback is that one need twice the amount of objects. I am very puzzpled why the tracing has this strange behavior. Is it a bug? And why do the doublication work?
Thanks John for the Macro. I will look into it.
Erik Vestergaard said:I am very puzzpled why the tracing has this strange behavior. Is it a bug?
Yes, it's a bug, but a very difficult bug to fix (Easy if you aren't concerned with render speed or memory usage, just render 8x8 supersample).
the white line occurs when two objects perfectly butt up against each other. We draw back to front, the first object draws, and the AA code mixes the color of the object with the white background along the edge, then we draw the second object, and we again mix the color of the fill along the edge, this time, the edge is a mixture of white and the color of the first object. The result is that a tiny bit of white seeps through, and this is what you see.
Thanks Hendrik
I still don't understand why duplications fixes the problem though.
Maybe because when you hit the plus sign or key. The offset is not really 0. It would be maybe .000001, but we don't notice it. This very tiny offset makes the white line disappear. What I normally do I duplicate it when everything is final then convert it to a bitmap.
Alex Galvez said:Maybe because when you hit the plus sign or key. The offset is not really 0.
I think I understand the behavior now. I still hope that CorelDRAW will correct it in a future version, even if the rendering will take a little extra time. Even though I don't use it much, I have Illustrator installed on my computer. I tested it: Illustrator doesn't show the same problem with partly white borders ... Thanks for alle the replies!
Erik Vestergaard said:I still hope that CorelDRAW will correct it in a future version, even if the rendering will take a little extra time.
I think duplicating is a bad workaround. Use any of the macros above which add an hairline outline to each shape that matches fill color. This is what should be done, not duplicating.
Ronny Axelsson said: The real problem is IMO that these lines are transferred when converting/exporting to bitmap.
The real problem is IMO that these lines are transferred when converting/exporting to bitmap.
I would say EVEN if it is vector graphics! Most of my graphics are vector graphics exported as EPS and inserted into MS Word and later transferred to PDF. Using vector all the way through I am sure my pdf documents, containings a lot of line drawings, have the quality it should have. Converting to any kind of bitmap will reduce quality. So please (Corel) make sure tracings will export properly in both bitmap and vector.