Particle probability hypothesis density filtering for multitarget visual tracking with robust state extraction

Abstract

Particle probability hypothesis density (PHD) filterbased visual trackers have achieved considerable success in the visual tracking field. But position measurements based on detection may not have enough ability to discriminate an object from clutter, and accurate state extraction cannot be obtained in the original PHD filtering framework, especially when targets can appear, disappear, merge, or split at any time. To meet the limitations, the proposed algorithm combines a color histogramof a target and the temporal dynamics in a unifying framework and a Gaussian mixture model clustering method for efficient state extraction is designed. The proposed tracker can improve the accuracy of state estimation in tracking a variable number of objects. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).