Hello all, To^i cu~ng ddang ra^'t ca^`n ta`i lie^.ui, sa=B4ch vo*? lie^n quan de^'n= pattern recognition va` nha^=B4t la` chu*o*ng tri`nh ve^` OCR (Optical Character Regconition). Ba'c na`o co=B4 ta`i lie^.u hoa(.c co=B4 ddi.a chi? internet cu?a ta`=EC= lie^.u thi` ma=B4ch cho to^i . Ca=B4m o*n ra^=B4t nhie^ui.