9. The apparatus of claim 8 , wherein the degraded pattern generating means further comprises: scaling means for performing a scaling process for the original character image, and for performing a blurring process on the scaled character image; and binarizing means for performing a binarization process for the scaled and blurred character image.
9. The apparatus of claim 8 , wherein the degraded pattern generating means further comprises: scaling means for performing a scaling process for the original character image, and for performing a blurring process on the scaled character image; and binarizing means for performing a binarization process for the scaled and blurred character image. 10. The apparatus of claim 9 , wherein the scaling means performs the scaling process for the original character image more than one time, and performs the blurring process for the scaled character image more than one time.