Calculation method of toner consumption amount for use in image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorHiroyuki Yamazaki
Life of this patent
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Abstract
An edge counter counts the number of edges satisfying a predetermined condition to provide an edge count. A pixel counter counts the number of pixels satisfying a predetermined condition to provide a pixel count. An image determination unit and a toner amount acquisition unit obtain a toner consumption amount based on the edge count and the pixel count for each area.
Claims20
An image forming apparatus for forming an image on a recording medium, comprising:
- a count unit configured to count, among a plurality of pixels in image data for forming the image, the number of pixels whose relationship with an adjacent pixel satisfies a predetermined edge condition to provide an edge count and to count the number of pixels having a density greater than or equal to a predetermined density to provide a pixel count;
- a determination unit configured to determine information regarding a type of the image based on the edge count and the pixel count;
- and
- a calculation unit configured to calculate a toner consumption amount based on the determined information regarding the type of the image and the pixel count.
A calculation method of a toner consumption amount, comprising:
- counting, among a plurality of pixels in image data, the number of pixels whose relationship with an adjacent pixel satisfies a predetermined edge condition to provide an edge count and counting the number of pixels having a density greater than or equal to a predetermined density to provide a pixel count;
- determining information regarding a type of the image based on the edge count and the pixel count;
- and
- calculating a toner consumption amount based on the determined information regarding the type of the image and the pixel count.
A non-transitory computer-readable storage medium storing a computer program that, when executed by an image forming apparatus, causes the an image forming apparatus to perform a method comprising:
- obtaining a ratio between a total edge count obtained by adding the number of the horizontal edges and the number of the vertical edges and said number of the vertical edges as an edge ratio;
- obtaining a correction amount for the toner consumption amount based on a pixel count comprising the number of pixels having a density greater than or equal to a predetermined density and the edge ratio;
- and
- correcting the toner consumption amount by adding the correction amount to the toner consumption amount.
Dependencies are inferred from the claim text.