实现文字的锐化和平滑 ，可以使模糊和黯淡的文字变得清晰美观，有利于读者的阅读。在实际应用中可以有效的改善效果-Realizing characters sharpen and smooth Can make the fuzzy and dark text becomes clear and beautiful, be helpful for readers reading The text sharpening and smooth, can make the fuzzy and dar