Apparatus, method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorsTakuya Inoue, Tatsunori Suzuki
Life of this patent
Estimating the term…
Abstract
In a case where a user manually selects an image to be converted into a monochrome image with distinguishability, the user is to take labor and may select an image unsuitable for conversion into a monochrome image with distinguishability. An attribute in a page of print data is analyzed for each page, and based on the attribute of the page, a distinguishability improvement method that performs conversion into gray data by using density difference or outline emphasis is switched.
Claims19
An apparatus comprising:
- an acquisition unit configured to acquire a number of colors used in a page of color data;
- a determination unit configured to determine a gray data conversion method from a first gray data conversion method and a second gray data conversion method, the first gray data conversion method converting the color data into gray data while assigning, based on the acquired number of colors, different gray values to the colors used in the color data, the second gray data conversion method converting the color data into gray data by combining a plurality of color components of the color data at a predetermined ratio;
- and
- a conversion unit configured to convert the color data into the gray data by using the determined gray data conversion method.
A method comprising:
- acquiring a number of colors used in a page of color data;
- determining a gray data conversion method from a first gray data conversion method and a second gray data conversion method, the first gray data conversion method converting the color data into gray data while assigning, based on the acquired number of colors, different gray values to the colors used in the color data, the second gray data conversion method converting the color data into gray data by combining a plurality of color components of the color data at a predetermined ratio;
- and
- converting the color data into the gray data by using the determined gray data conversion method.
A non-transitory computer-readable storage medium storing a program for causing a computer to execute a method, the method comprising:
- acquiring a number of colors used in a page of color data;
- determining a gray data conversion method from a first gray data conversion method and a second gray data conversion method, the first gray data conversion method converting the color data into gray data while assigning, based on the acquired number of colors, different gray values to the colors used in the color data, the second gray data conversion method converting the color data into gray data by combining a plurality of color components of the color data at a predetermined ratio;
- and
- converting the color data into the gray data by using the determined gray data conversion method.
Dependencies are inferred from the claim text.