Patent ID: 8422898
Filing Date: 2013-04-16
Classification: G03G

Abstract:
1. An image forming apparatus forming an image by using an electronic photography process, comprising: an image carrier capable of holding a toner pattern; a memory device in which toner pattern data is stored; a sensor that puts detection light onto the image carrier and detects reflection light from the image carrier; and a control unit that forms the toner pattern based on the toner pattern data and identifies a toner density of the toner pattern from output of the sensor; wherein the toner pattern data is threshold conversion data of a partial image, the partial image is a part of a base pattern image with a predetermined size and does not contain any sides of the base pattern image, and the base pattern image is an image generated in a threshold conversion method that performs single or multiple threshold conversion by sequentially calculating a converted pixel value from original values of adjacent pixels; and the control unit generates an image of the toner pattern by arranging the partial image of the toner pattern data repeatedly.