- From: Bernhard Haslhofer <bernhard.haslhofer@univie.ac.at>
- Date: Thu, 9 Sep 2010 12:17:21 +0200
- To: Raphaël Troncy <raphael.troncy@eurecom.fr>
- Cc: public-media-fragment@w3.org, Robert Sanderson <azaroth42@gmail.com>, Simon Rainer <Rainer.Simon@ait.ac.at>
Dear Raphael, On Sep 8, 2010, at 6:10 PM, Raphaël Troncy wrote: > Dear Bernhard, > > Thanks for having sent your use cases and starting up this thread as I > have encouraged you last week. > > It seems to me that your use cases are pretty similar to the ones described in our Use Cases document, in particular at http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-reqs/#uc4 > Would you agree with this? > This shows at least that your questions are really relevant. Yes. I just tried to make the issue of complex regions explicit. > > I do have one question regarding your second use case: > >> - Scenario 2: Spatial and Temporal Annotation of Videos with complex >> region-shapes >> >> Bernhard selects a video sequence (start-& end-point) in an online >> video and creates a new annotation for that sequence. He draws an >> ellipse around a specific region in a frame in order to identify the >> spatial dimension of his annotation. Then he writes a note for this >> region. The system exposes his annotation as an RDF document, where >> the annotated map region is identified by a media fragment URI. > > In this use case, would you need to address a fixed spatial region over a period of time? Or would you need to address a moving region? Addressing a moving spatial region in a video is quite complex because it requires the annotation client to track moving objects in a video. We are not going to implement this. For us it would be fine to be able to address a fixed spatial region; so it would be the same technical solution as for still image annotation... b > More comments to follow ... > Best regards. > > Raphaël > > -- > Raphaël Troncy > EURECOM, Multimedia Communications Department > 2229, route des Crêtes, 06560 Sophia Antipolis, France. > e-mail: raphael.troncy@eurecom.fr & raphael.troncy@gmail.com > Tel: +33 (0)4 - 9300 8242 > Fax: +33 (0)4 - 9000 8200 > Web: http://www.eurecom.fr/~troncy/ > ______________________________________________________ Research Group Multimedia Information Systems Department of Distributed and Multimedia Systems Faculty of Computer Science University of Vienna Postal Address: Liebiggasse 4/3-4, 1010 Vienna, Austria Phone: +43 1 42 77 39635 Fax: +43 1 4277 39649 E-Mail: bernhard.haslhofer@univie.ac.at WWW: http://www.cs.univie.ac.at/bernhard.haslhofer
Received on Thursday, 9 September 2010 10:17:55 UTC