REAL-TIMEAUTOMATIC MOVING OBJECTEXTRACTION AND TRACINGBASEDON IMPROVED ACTIVECONTOUR MODEL
Yunchuan Gengt, Yangxing Liut, Satoshi Goto · 2005
A real-time movingobject extraction andtracing algorithm isproposed forvideophone application. Semantic objects, mainly moving objects inthis specified case, areextracted byblock based change detection from first several frames. Improved active contour modelis thenutilized forobject tracing. Sincethereislittle difference between continuous twoframes, onlylimited pixels needtobesearched instead ofwholeframe scanso that computing complexity isgreatly decreased. Therefore, itisable tobeusedforreal-time applications suchasthat invideophone. However, previous active contour modelis sensitive tonoise. Errororiginating fromnoisetraps accumulates anddeteriorates thetracing results. So gradient projection (GP)andjumpback(JB)mechanisms areintroduced tosuppress noise trapeffect anderror accumulation in thispaper.Experiment results demonstrate that proposed algorithm isanefficient noise tolerable real-time approach.