Image forming apparatus performing specified-color removal process, control method therefor, and storage medium storing control program therefor
AssigneeCanon Kabushiki Kaisha
InventorHidekazu Nakashio
Life of this patent
Estimating the term…
Abstract
An image forming apparatus that is capable of improving a specified-color removal process. An obtaining unit obtains color image data. A color specification unit specifies removal color. A specified-color removal unit removes color that is determined to be removed according to determination based on a brightness threshold and a first saturation threshold about the removal color from the color image data obtained.
Claims13
An image forming apparatus comprising:
- an obtaining unit configured to obtain color image data;
- a color specification unit configured to specify color to be removed;
- and
- a specified-color removal unit configured to remove color that is determined to be removed according to a determination based on a brightness threshold and a saturation threshold about the color specified by the color specification unit from the color image data obtained by the obtaining unit,
- wherein in a case where the color specification unit specifies a chromatic color, the specified-color removal unit removes color that is more than the brightness threshold and is more than the saturation threshold in the chromatic color specified by the color specification unit, whereas the specified-color removal unit does not remove color that is equal to or less than the brightness threshold and is more than the saturation threshold in the chromatic color specified by the color specification unit.
An image forming apparatus comprising:
- an obtaining unit configured to obtain color image data;
- a color specification unit configured to specify color to be removed;
- and
- a specified-color removal unit configured to remove color that is determined to be removed according to a determination based on a brightness threshold and a saturation threshold about the color specified by the color specification unit from the color image data obtained by the obtaining unit,
- wherein in a case where the color specification unit specifies black, the specified-color removal unit removes color that is less than the saturation threshold or less than the brightness threshold, whereas the specified-color removal unit does not remove color that is equal to or more than the saturation threshold and equal to or more than the brightness threshold.
A control method for an image forming apparatus obtaining color image data, the control method comprising:
- a color specification step of specifying color to be removed;
- and
- a specified-color removal step of removing color that is determined to be removed according to a determination based on a brightness threshold and a saturation threshold about the color specified in the color specification step from the color image data obtained,
- wherein in a case where chromatic color is specified in the color specification step, color that is more than the brightness threshold and is more than the saturation threshold in the chromatic color specified in the color specification step is removed in the specified-color removal step, whereas color that is equal to or less than the brightness threshold and is more than the saturation threshold in the chromatic color specified in the color specification step is not removed in the specified-color removal step.
A non-transitory computer-readable storage medium storing a control program causing a computer to execute a control method for an image forming apparatus obtaining color image data, the control method comprising:
- a color specification step of specifying color to be removed;
- and
- a specified-color removal step of removing color that is determined to be removed according to a determination based on a brightness threshold and a saturation threshold about the color specified in the color specification step from the color image data obtained,
- wherein in a case where chromatic color is specified in the color specification step, color that is more than the brightness threshold and is more than the saturation threshold in the chromatic color specified in the color specification step is removed in the specified-color removal step, whereas color that is equal to or less than the brightness threshold and is more than the saturation threshold in the chromatic color specified in the color specification step is not removed in the specified-color removal step.
Dependencies are inferred from the claim text.