%0 Journal Article %A Soon-Hyun Park and Takami Matsuo %D 2008 %J International Journal of Electrical and Information Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 20, 2008 %T Time-Derivative Estimation of Noisy Movie Data using Adaptive Control Theory %U https://publications.waset.org/pdf/10414 %V 20 %X This paper presents an adaptive differentiator of sequential data based on the adaptive control theory. The algorithm is applied to detect moving objects by estimating a temporal gradient of sequential data at a specified pixel. We adopt two nonlinear intensity functions to reduce the influence of noises. The derivatives of the nonlinear intensity functions are estimated by an adaptive observer with σ-modification update law. %P 2818 - 2825