Patent ID: 7035463

Claim:
A document image processor comprising: image inputting means for preparing a document image by reading a paper document; region dividing means for dividing the document image into a plurality of regions; and title-region extracting means for calculating first averages as an average of character size for characters in each region divided by the region dividing means, and then extracting title regions from the respective regions according to the first averages, wherein the title-region extracting means further comprises: means for calculating a second average that is an average of character size for characters within all the regions; means for comparing the first averages and extracting criteria found by multiplying the second average by extracting parameters, the extracting parameters on a plurality of levels calculated based on a value found by dividing a maximum of the first averages by the second average; and means for extracting the regions with the first average larger than the extracting criteria, as the title region.