To effectively cope with the unexpected event of visual contamination of mobile robots,a contingency planning approach is proposed based on case-based reasoning(CBR). Firstly, a wheeled mobile robot(WMR) equipped with the chameleon-inspired visual system is described, and the negative-correlation mechanism of binocular movement is analyzed.In order to realize the detection of static contaminants in dynamic scene, an improved contaminant extraction algorithm is proposed, which combines the frame difference m...