Title :
Multi-View Active Shape Model with Robust Parameter Estimation
Author :
Zhang, Li ; Ai, Haizhou
Author_Institution :
Dept. of Comput. Sci. & Technol., Tsinghua Univ., Beijing
Abstract :
Active shape model is an efficient way for localizing objects with variable shapes. When ASM is extended to multi-view cases, the parameter estimation approaches in previous works are often sensitive to the initial view, as they do not handle the unreliability of local texture search, which can be caused by bad initialization or cluttered background. To overcome this problem, we propose a novel algorithm for parameter estimation, using robust estimators to remove outliers. By weighting dynamically, our method acts as a model selection method, which reveals the hidden shape and view parameters from noisy observations of local texture models. Experiments and comparisons on multi-view face alignment are carried out to show the efficiency of our approach
Keywords :
image registration; image texture; parameter estimation; image registration; local texture model; model selection method; multiview active shape model; robust parameter estimation; Active shape model; Computer science; Humans; Multi-stage noise shaping; Parameter estimation; Principal component analysis; Robustness; Solid modeling; Statistical distributions; Training data;
Conference_Titel :
Pattern Recognition, 2006. ICPR 2006. 18th International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
0-7695-2521-0
DOI :
10.1109/ICPR.2006.834