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- From: fabio@applelink.apple.com (Fabio Pettinati)
- Subject: Re: Morph Alogrithm ??
- Sender: news@pcnntp.apple.com
- Message-ID: <1993Jan23.031706.13462@pcnntp.apple.com>
- Date: Sat, 23 Jan 1993 03:17:06 GMT
- References: <146167@lll-winken.LLNL.GOV> <73593@cup.portal.com> <eaeu209-150193173343@714-725-3176.nts.uci.edu> <1380@taniwha.UUCP>
- Organization: Apple Computer, Inc.
- Lines: 53
-
- In article <1380@taniwha.UUCP>, paul@taniwha.UUCP (Paul Campbell) writes:
- >
- >
- > >>can anyone tell me where I can dig up an efficient algorithm to do the
- > >>transformation effect that's used by the program Morph?
- >
- > >A friend of mine told me that the algorithm is published in some
- > >programmer association (the name eludes me right now) that's the
- > >equivalent of IEEE for engineers.
- >
- > There's lots of morph algorithms .... in the past year or so every man and
- > and his dog has come up with one .... some are better than others, some are
- > faster than others ... the one that's in Morph is much faster than any others
- > I've seen (even running on much faster platforms) and produces a great result
- > I doubt Duane has published it.
- >
- > The IEEE IS for engineers ...
- >
- > Paul
- >
- Signature deleted
-
- The morph algorithm used in the Morph (tm) application is indeed awesome:
- very fast and of good quality. Although the algorithm is proprietary, it is
- known that it is based on the well-known (albeit not unique) concept of
- tesselating the picture(s) with non-overlapping triangles, and then mapping
- triangles from one picture onto triangles in the other. Like many other
- algorithms, this one here sort of falls apart when triangles begin overlapping.
- This usually happens when you morph people whose heads face opposite
- directions. The end result is that some images suffer from tearing. The good
- news is that Morph's high quality option usually minimizes these visual
- artifacts. The even better news is that even on much costlier applications
- one can see artifacts!
-
- During the presidential election, I spent countless hours (to my wife's
- dismay) morphing the faces of all three candidates to get the "right" president.
- Tearings were most visible when George Bush morphed into Bill Clinton :-):-).
-
- For technical info on morphing algorithms, please refer to the following
- publications:
-
- Digital Image Warping
- George Wolberg
- IEEE Computer Society Press Monograph
-
- Siggraph'92 Conference Proceedings
- Vol 26, #2, July 1992
-
- IEEE is for ELECTRIC and ELECTRONIC engineers ...
-
- Fabio Pettinati
- Macintosh System Software
-
-