antialias edges

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

Thread Tools Search this Thread Display Modes
  04 April 2002
antialias edges

Hi, I have a 3d animation which I rendered without antialiasing. The textures are simple so the only place the lack of antialiasing shows up is at the edges of the objects. My computer then crashed and I lost all of my scene files so I can't rerender with antialiasing. I am wondering, is there a way to have after effects intelligently edge detect my frames and antialias or blur or something to that effect so my objects look less jagged around the edges??
  05 May 2002
Not really. You could just blur the alpha channel but that might look crappy. My advice is to redo it.

  05 May 2002
There are several possibilities.

First, you can (gaussian) blur the alpha by 2 pixels, then add a brightness/contrast filter on top of it. Set contrast to about 80%, then play with brightness until you bg is completely cut off by the alpha. This method will round off fine detail in the alpha but otherwise nicely antialias it. If you're animation is some organic object, like e.g. a character, chances are good that this will work for you.

Another option is to use a deprecated software called "JAG" from Metacreations. Unlike Painer, Bryce, etc., it has not been sold to any party that continues its development. If you're lucky, you find a dusted copy at some dealer. JAG II could also batch antialias files. Both programs did a marvelous job of antialiasing images. I'm not sure if JAG II was ever released on the PC platform at all or Mac only.
Personally, I only have a PC JAG I copy. So I can't even offer you to send me the sequence and antialias it for you ... :(

Third, I know of someone who was writing a tool that is based on the same tech paper as JAG. I can dig out his e-mail address and you can contact him.

Fourth, I can also send you the resp. tech paper as PDF; so if you're the programmer type, you can try to implement the algorithm by your own. It basically finds the edges in the image and refits polylines/splines through them which are drawn antialiased, using the resp. original pixel's color.


  01 January 2006
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
Thread Closed share thread

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Society of Digital Artists

Powered by vBulletin
Copyright ©2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump

All times are GMT. The time now is 01:02 PM.

Powered by vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.