Qualitative Abstraction and Inherent Uncertainty in Scene Recognition (bibtex)
by Carsten Elfers, Otthein Herzog, Andrea Miene, Thomas Wagner
Abstract:
The interpretation of scenes, e.g., in videos, is demanding at all levels. At the image processing level it is necessary to apply an ?intelligent? segmentation and to determine the objects of interest. For the higher symbolic levels it is a challenging task to perform the transition between quantitative and qualitative data and to determine the relations between objects. Here we assume that the position of objects (?agents?) in images and videos will already be determined as a minimal requirement for the further analysis. The interpretation of complex and dynamic scenes with embedded intentional agents is one of the most challenging tasks in current AI and imposes highly heterogeneous requirements. A key problem is the efficient and robust representation of uncertainty. We propose that uncertainty should be distinguished with respect to two different epistemological sources: (1) noisy sensor information and (2) ignorance. In this presentation we propose possible solutions to this class of problems. The use and evaluation of sensory information in the field of robotics shows impressive results especially in the fields of localization (e.g. MCL) and map building (e.g. SLAM) but also imposes serious problems on the successive higher levels of processing due to the probabilistic nature. In this presentation we propose that the use of (a) qualitative abstraction (classic approach) from quantitative to (at least partial) qualitative representations and (b) coherence-based perception validation based on Dempster-Shafer (DST) can help to reduce the problem significantly. The second important probability problem class that will be addressed is ignorance. In our presentation we will focus on reducing missing information by inference. We contrast/compare our experiences in an important field of scene interpretation namely plan and intention recognition. The first approach is based on a logical abductive approach and the second approach in contrast uses a probabilistic approach (Relational Hidden Markov Model (RHMM)).
Reference:
Carsten Elfers, Otthein Herzog, Andrea Miene, Thomas Wagner, "Qualitative Abstraction and Inherent Uncertainty in Scene Recognition", In Logic and Probability for Scene Interpretation, Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, no. 08091, Wadern, 2008.
Bibtex Entry:
@INPROCEEDINGS{Elfers2008a,
  author = {Elfers, Carsten and Herzog, Otthein and Miene, Andrea and Wagner,
	Thomas},
  title = {Qualitative Abstraction and Inherent Uncertainty in Scene Recognition},
  booktitle = {Logic and Probability for Scene Interpretation},
  year = {2008},
  editor = {Cohn, Anthony G. and Hogg, David C. and M{\"o}ller, Ralf and Neumann,
	Bernd},
  number = {08091},
  series = {Dagstuhl Seminar Proceedings},
  address = {Wadern},
  month = {February25--29},
  publisher = {Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik},
  abstract = {The interpretation of scenes, e.g., in videos, is demanding at all
	levels. At the image processing level it is necessary to apply an
	?intelligent? segmentation and to determine the objects of interest.
	For the higher symbolic levels it is a challenging task to perform
	the transition between quantitative and qualitative data and to determine
	the relations between objects. Here we assume that the position of
	objects (?agents?) in images and videos will already be determined
	as a minimal requirement for the further analysis. The interpretation
	of complex and dynamic scenes with embedded intentional agents is
	one of the most challenging tasks in current AI and imposes highly
	heterogeneous requirements. A key problem is the efficient and robust
	representation of uncertainty. We propose that uncertainty should
	be distinguished with respect to two different epistemological sources:
	(1) noisy sensor information and (2) ignorance. In this presentation
	we propose possible solutions to this class of problems. The use
	and evaluation of sensory information in the field of robotics shows
	impressive results especially in the fields of localization (e.g.
	MCL) and map building (e.g. SLAM) but also imposes serious problems
	on the successive higher levels of processing due to the probabilistic
	nature. In this presentation we propose that the use of (a) qualitative
	abstraction (classic approach) from quantitative to (at least partial)
	qualitative representations and (b) coherence-based perception validation
	based on Dempster-Shafer (DST) can help to reduce the problem significantly.
	The second important probability problem class that will be addressed
	is ignorance. In our presentation we will focus on reducing missing
	information by inference. We contrast/compare our experiences in
	an important field of scene interpretation namely plan and intention
	recognition. The first approach is based on a logical abductive approach
	and the second approach in contrast uses a probabilistic approach
	(Relational Hidden Markov Model (RHMM)).},
  isbn = {1862-4405},
  keywords = {Scene interpretation,intentional agents,uncertainty,qualitative abstraction,coherence-based
	perception,abduction,RHMM},
  owner = {pmania},
  timestamp = {2012.11.06},
  url = {http://drops.dagstuhl.de/opus/volltexte/2008/1614/}
}
Powered by bibtexbrowser