Utpal Garain Atishay Jain Anjan Maity Bhabatosh Chanda Machine reading of camera-held low quality text images: An ICA-based image enhancement approach for improving OCR accuracy. 1-4 2008 ICPR http://dx.doi.org/10.1109/ICPR.2008.4761840 conf/icpr/2008 db/conf/icpr/icpr2008.html#GarainJMC08