1. An image processing apparatus comprising: an appearance data generating section for generating appearance data according to a drawing appearance of a processed document, the appearance data representing respective drawing total amounts of drawing appearance elements of the processed document; a classification information producing section for producing, by obtaining a ratio of the respective drawing total amounts of the drawing appearance elements from the appearance data, classification information which is for classifying the processed document; a saving section for saving a data file of the processed document in a storage section together with the classification information of the data file; an inputting section to which appearance information of the processed document desired by a user is inputted; an appearance information converting section for converting the appearance information into the classification information and then outputting the classification information; and a searching section for searching the storage section to find the data file of the processed document consistent with the outputted classification information, wherein the classification information being obtained, by weighting the ratio of the respective drawing total amounts of the drawing appearance elements, based on a visual effect, so that a gap due to the visual effect between the drawing appearance of the processed document in the use's memory and the ratio of the respective drawing total amounts of the drawing appearance elements is adjusted.