Abstract: A method and apparatus analyzes and annotates a technical talk typically illustrated with overhead slides, wherein the slides are recorded in a video sequence. The video sequence is condensed and digested into key video frames adaptable for annotation to time and audio sequence. The system comprises a recorder for recording a technical talk as a sequential set of video image frames. A stabilizing processor segregates the video image frames into a plurality of associated subsets each corresponding to a distinct slide displayed at the talk and for median filtering of the subsets for generating a key frame representative of each of the subsets. A comparator compares the key frame with the associated subsets to identify differences between the key frame and the associates subset which comprise nuisances and affordances. A gesture recognizer locates, tracks and recognizes gestures occurring in the subset as gesture affordances and identifies a gesture video frame representative of the gesture affordance.

Abstract: The present invention provides a method and system of publicly co-creating a narrative document by parallel and on-going communication of a plurality of signals comprising public reactions to portions of the document, the signals being generated via one or more repurposed signaling devices. A display illustrates an introductory portion of the document intended to engender a public interest in the document and an emotive or intellectual reaction thereto. The document can comprise a dependent set of associated document elements which are sequentially variable for variation of document content to evolve different document narratives. The public viewing the display communicates, via the device or devices, a signal indicative of their reactions and for effecting a prospective scene selection in the document content that, in turn will vary the narrative.