| 摘要 |
The toner consumption amount in the image forming apparatus is calculated accurately. The printing dot subject to process (mark of a circle with hatching) is divided into classes depending upon the number of adjacent dot (mark of a white circle) present around the dot subject to process, and the number of dots is counted for each of the classes. The toner adhesion amount of the printing dot is different depending upon the number of the adjacent dots, hence weight coefficients K0 through K8 corresponding to the difference are set in advance. The count for each of the classes is multiplied by the coefficient corresponding to each of the classes and accumulated, whereby the toner consumption amount is calculated accurately in a state that dots are arranged in two dimension.
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