- From: Kostas Karpouzis <kkarpou@cs.ntua.gr>
- Date: Mon, 12 May 2008 13:56:53 +0300
- To: EMOXG-public <public-xg-emotion@w3.org>
Catherine Pelachaud wrote: > > > My 2 cents on the definition of min, max. > In MPEG-4 facial Animation Parameters have no min-max. Any values are > allowed. The difficulty is to make sure that all MPEG-4 player > interprets the values in a similar manner. To ensure this, detailled > examples are provided as well as animation files that served as test bed. > I also like the idea of not having min-max specified. It allows for much > more flexibility and also not to have to define what it is absolute max Plus, some applications may _want_ to use excessive values (e.g. for eye-popping, cartoon-like animation) In addition to this, in MPEG-4 units are inherent in the measurement, since values normalized wrt constant distances; e.g. FAPs related to the eyebrows are normalized using the distance between the eyes and the nose, which (normally) is a constant. > Regarding fuzziness and labels, I would think that it's best to leave it up to applications reading and using EMOXG to define them or, in any case, a higher-level structure which again would be app-dependent (an ontology relating feature points to FAPs to expressivity maybe?) In some cases, or for certain users, a specific measurement of eyebrow movement, for instance, may correspond to 'high' activation, while in other cases or contexts, the same measurement may be labeled 'medium'
Received on Monday, 12 May 2008 10:58:04 UTC