An image processing apparatus includes a region dividing section, an character recognizing section, a classifying section, a translating section, a calculation section and a correcting section. The region dividing section divides a document image into sentence regions. The character recognizing section recognizes characters in the respective sentence regions. The classifying section classifies the sentence regions into groups in accordance with sizes of the characters. The translating section translates a sentence into a given language for each of the sentence regions. The calculation section calculates a character size of a sentence, which has been translated for each of the sentence regions by the translating section. And The correcting section corrects a size of a translated character of each character region for every sentence region classified into the same group such that the character sizes calculated by the calculating section become equal.