Image forming apparatus and method of page classification therein
AssigneeCanon Kabushiki Kaisha
InventorTakashi Annaka
Life of this patent
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Abstract
In a case of performing free size printing with a charging approach in which a charge classification is determined based on a color pixel utilization rate, the color pixel utilization rate calculating is performed using a total number of pixels in an image area cut out at a size for color pixel utilization rate calculation, rather than the generation image data on the whole, for a denominator. With this, the calculation result of the color pixel utilization rate is prevented from becoming inaccurate.
Claims11
An image forming apparatus comprising:
- a determination unit configured to determine whether an output sheet size is in a first category or in a second category having a size larger than that of the first category;
- a unit configured to obtain a color surface area in a printing target page;
- and
- a deciding unit configured to decide a charge classification of the page from among a monochrome charge classification and a plurality of color charge classification based on the determined category and the obtained color surface area, wherein
- the determining unit, in a case where the output sheet size is unknown, is configured to determine that the output sheet size is in the second category.
A page classification method by an image forming apparatus, the method comprising:
- a determination step of determining whether an output sheet size is in a first category or in a second category having a size larger than that of the first category;
- a step of obtaining a color surface area in a printing target page;
- and
- a decision step of deciding a charge classification of the page from among a monochrome charge classification and a plurality of color charge classification based on the determined category and the obtained color surface area, wherein
- in the determining step, in a case where the output sheet size is unknown, it is determined that the sheet size is in the second category.
A non-transitory computer readable storage medium storing a program for causing a page classification method to be executed by a computer, the method comprising:
- a determination step of determining whether an output sheet size is in a first category or in a second category having a size larger than that of the first category;
- a step of obtaining a color surface area in a printing target page;
- and
- a decision step of deciding a charge classification of the page from among a monochrome charge classification and a plurality of color charge classification based on the determined category and the obtained color surface area, wherein
- in the determining step, in a case where the output sheet size is unknown, it is determined that the sheet size is in the second category.
Dependencies are inferred from the claim text.