in International Journal of Image and Graphics, to appear, 2007
This paper introduces a graphical user interface approach to facilitate
an efficient and timely generation of statistic data from input videos.
By means of a carefully-designed graphical user interface, users can
interactively add in various kinds of markers, known as the
statistic inducers, on the screen of an input video to specify
the areas of interest corresponding to the locations of relevant events.
These inducers are in the form of two-dimensional points, lines,
and grids, and can be put on the video screen with great ease. Using
these inducers, we not only can efficiently customize the system for a
given statistic generation task; in addition, we can also precisely
constrain the time-consuming space-time video analysis process (as well
as any additional analysis process like optical flow computation or
object recognition) on the user-specified areas. To demonstrate the
efficacy of the proposed approach, we developed a prototypic system and
experimented it in two different statistic generation cases: dormitory
light switching and road traffic. In both cases, we just need a few
minutes of UI customization time to set up the inducers; once this is
done, timely statistics can be automatically generated subsequently.