%0 Conference Paper %B Computer Vision, 1998. Sixth International Conference on %D 1998 %T A framework for modeling appearance change in image sequences %A Black,M. J %A Fleet,D. J %A Yacoob,Yaser %K appearance change %K camera motion %K complex occlusion events %K generic photometric events %K iconic changes %K illumination %K image motion %K Image sequences %K Motion estimation %K optical flow %X Image ldquo;appearance rdquo; may change over time due to a variety of causes such as: 1) object or camera motion; 2) generic photometric events including variations in illumination (e.g. shadows) and specular reflections; and 3) ldquo;iconic changes rdquo; which are specific to the objects being viewed and include complex occlusion events and changes in the material properties of the objects. We propose a general framework for representing and recovering these ldquo;appearance changes rdquo; in an image sequence as a ldquo;mixture rdquo; of different causes. The approach generalizes previous work on optical flow to provide a richer description of image events and more reliable estimates of image motion %B Computer Vision, 1998. Sixth International Conference on %P 660 - 667 %8 1998/01// %G eng %R 10.1109/ICCV.1998.710788