String Extraction From Color Airline Coupon Image Using Statistical Approach. - Yi Li; Zhiyan Wang; Haizan Zeng (ICDAR, 2003)

Adaptive color document image binarization for text retrieval. - Yi Li; Zhiyan Wang; Haizan Zeng (DRR, 2004)

Correlation Filter: An Accurate Approach to Detect and Locate Low Contrast Character Strings in Complex Table Environment. - Yi Li; Zhiyan Wang; Haizan Zeng (IEEE Trans. Pattern Anal. Mach. Intell., 2004)