IMAGE PROCESSING APPARATUS, METHOD OF CONTROLLING IMAGE PROCESSING APPARATUS, AND PRINTING APPARATUS
First Claim
1. An image processing apparatus configured to print an image, the image processing apparatus comprising:
- a preliminary halftone processing unit configured to determine whether a preliminary dot through a dithering method is to be formed on the basis of a data gradation value in image data;
a final halftone processing unit configured to determine whether a dot to be printed through an error diffusion method is to be formed on the basis of the data gradation value; and
a dither result application level control unit configured to control a dither result application level, the dither result application level being a level at which probability that the dot to be printed will be formed is raised when the preliminary dot is formed, whereinthe final halftone processing unit applies the dither result application level, andthe dither result application level control unit reduces the dither result application level during printing in a case where copy data from a reflected document is used as the image data or a case where the image data contains many high-frequency components, compared to other instances of printing.
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Accused Products
Abstract
An image processing apparatus that prints an image includes a preliminary halftone processing unit configured to determine whether a preliminary dot through a dithering method is to be formed, a final halftone processing unit configured to determine whether a dot to be printed through an error diffusion method is to be formed, and a dither result application level control unit configured to control a dither result application level which is a level at which probability that the dot to be printed will be formed is raised with the final halftone processing unit when the preliminary dot is to be formed in the preliminary halftone processing unit. The dither result application level control unit reduces the dither result application level during printing in a case of copying a reflected document or a case where the image data contains many high-frequency components, compared to other instances of printing.
2 Citations
20 Claims
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1. An image processing apparatus configured to print an image, the image processing apparatus comprising:
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a preliminary halftone processing unit configured to determine whether a preliminary dot through a dithering method is to be formed on the basis of a data gradation value in image data; a final halftone processing unit configured to determine whether a dot to be printed through an error diffusion method is to be formed on the basis of the data gradation value; and a dither result application level control unit configured to control a dither result application level, the dither result application level being a level at which probability that the dot to be printed will be formed is raised when the preliminary dot is formed, wherein the final halftone processing unit applies the dither result application level, and the dither result application level control unit reduces the dither result application level during printing in a case where copy data from a reflected document is used as the image data or a case where the image data contains many high-frequency components, compared to other instances of printing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of controlling an image processing apparatus configured to print an image, by using a computer, the method comprising:
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carrying out preliminary halftone processing of determining whether a preliminary dot through a dithering method is to be formed on the basis of a data gradation value in image data; carrying out final halftone processing of determining whether a dot to be printed through an error diffusion method is to be formed on the basis of the data gradation value; and controlling a dither result application level, the dither result application level being a level at which probability that the dot to be printed will be formed is raised when the preliminary dot is to be formed, wherein the final halftone processing applies the dither result application level, and the dither result application level control unit reduces the dither result application level during printing in a case where copy data from the reflected document is used as the image data or a case where the image data contains many high-frequency components, compared to other instances of printing.
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20. A printing apparatus including a printing mode for printing an image and a reflective document copying mode for copying a reflected document, the printing apparatus comprising:
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a preliminary halftone processing unit configured to determine whether a preliminary dot through a dithering method is to be formed on the basis of a data gradation value in image data; a final halftone processing unit configured to determine whether a dot to be printed through an error diffusion method is formed on the basis of the data gradation value; and a dither result application level control unit configured to control a dither result application level, the dither result application level being a level at which probability that the dot to be printed will be formed is raised when the preliminary dot is formed, wherein the final halftone processing unit applies the dither result application level, and the dither result application level control unit reduces the dither result application level during printing in the case of the reflective document copying mode, compared to other instances of printing.
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Specification