Patent Document ID: 20040061883
Application ID: 10667413
Patent Status: 0

Claim One:
1. An image processing method comprising: a first pixel block sampling step of recursively sampling black pixel blocks and white pixel blocks from a binary image; a tree structure creating step of creating tree structure data indicating a positional relation between the black pixel blocks and white pixel blocks sampled in said first pixel block sampling step; an inverted image creating step of creating an inverted image by white-black-inverting the insides of black pixel blocks that can include inverted characters, of black pixel blocks included in said tree structure data; a second pixel block sampling step of sampling white pixel block and black pixel blocks from the inverted image created in said inverted image creating step; and a tree structure addition step of adding data regarding the white pixel blocks and black pixel blocks sampled in said second pixel block sampling step to corresponding nodes of said tree structure data.