Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: An Algorithm for Motion Parameter Direct Estimate Roberto Caldelli | EURASIP Journal on Applied Signal Processing 2004 6 861-870 2004 Hindawi Publishing Corporation An Algorithm for Motion Parameter Direct Estimate Roberto Caldelli Dipartimento di Elettronica e Telecomunicazioni Universita di Firenze Via S. Marta 3 50139 Firenze Italy Email caldelli@ Franco Bartolini Dipartimento di Elettronica e Telecomunicazioni Universita di Firenze Via S. Marta 3 50139 Firenze Italy Email barto@ Vittorio Romagnoli Dipartimento di Elettronica e Telecomunicazioni Universita di Firenze Via S. Marta 3 50139 Firenze Italy Email romagnoli@ Received 29 January 2003 Revised 5 September 2003 Motion estimation in image sequences is undoubtedly one of the most studied research fields given that motion estimation is a basic tool for disparate applications ranging from video coding to pattern recognition. In this paper a new methodology which by minimizing a specific potential function directly determines for each image pixel the motion parameters of the object the pixel belongs to is presented. The approach is based on Markov random fields modelling acting on a first-order neighborhood of each point and on a simple motion model that accounts for rotations and translations. Experimental results both on synthetic noiseless and noisy and real world sequences have been carried out and they demonstrate the good performance of the adopted technique. Furthermore a quantitative and qualitative comparison with other well-known approaches has confirmed the goodness of the proposed methodology. Keywords and phrases motion parameter estimation MAP criterion Markov random fields iterated conditional mode motion models. 1. INTRODUCTION Estimation of motion fields and their segmentation are still an important task to be solved in disparate applications ranging from pattern recognition to image sequence analysis passing through object tracking and video coding determining trajectories and positions of objects composing the .
