20. The article of manufacture of claim 16 , wherein the computation of the properties of the given region further comprises a detection of one or more gestures, and wherein the processor is further configured to associate the one or more detected gestures with the given region.
16. An article of manufacture comprising a computer readable storage medium for storing computer readable program code which, when executed, causes a computer to: receive a speech input; generate at least two speech recognition candidates from the speech input; observe a scene related to the speech input using one or more non-acoustic sensors; segment the observed scene into a plurality of regions, wherein each of the regions corresponds to an object or a surface in the observed scene; compute properties for at least a given region of the plurality of regions, wherein the computation of the properties for the given region comprises a computation of one or more characteristics for the given region a computation of one or more relationships between the given region and remaining ones of the plurality of regions, and wherein the one or more characteristics of the given region comprise a color, a shape and a textual label; and select one of the speech recognition candidates based at least in part on the computed properties of the given region.