1. A character recognition apparatus, comprising: a decolorization control section configured to carry out a decolorization processing for a sheet; an image reading control section configured to carry out an image reading processing for the sheet to which the decolorization processing is executed; and a character recognition processing section configured to carry out a character recognition processing for a decolorized image read through the image reading processing after the decolorization processing is carried out or for a generated image generated according to the decolorized image, the character recognition processing recognizes characters, wherein the characters comprise text data.