Patent ID: 7508987
Filing Date: 2009-03-24
Classification: G06K,H04N

Abstract:
1. An image processor, comprising: an image obtainer configured to obtain a multivalue image, the multivalue image containing a character or line portion and a background portion; a brightness image generator configured to generate a brightness image of the multivalue image, representing brightness values of respective pixels of the multivalue image, wherein the brightness image is expressed in an XYZ coordinate system, with X corresponding to main scanning directions of the respective pixels, Y corresponding to a subscanning directions of the respective pixels, and Z corresponding to the brightness values of the respective pixels; a topographic feature image generator configured to generate a topographic feature image of the multivalue image, having a topographic feature corresponding to the brightness values of the brightness image; and a topographic feature adder configured to generate a binary image of the multivalue image, by using information contained in the topographic feature of the topographic feature image.