3. The method of claim 2 , further comprising: (e) after step (d), binarizing each non-halftone text region using pixel value statistics calculated from pixels in that region only, to generate a binary map for each non-halftone text region.
3. The method of claim 2 , further comprising: (e) after step (d), binarizing each non-halftone text region using pixel value statistics calculated from pixels in that region only, to generate a binary map for each non-halftone text region. 7. The method of claim 3 , wherein step (e) comprises applying a local thresholding method or a global thresholding method to each non-halftone text region.