Image processing apparatus, image processing method, and program
AssigneeCanon Kabushiki Kaisha
InventorHirokazu Tamura
Life of this patent
Estimating the term…
Abstract
An image processing apparatus which performs image processing for print processing, including: a pseudo halftone processing unit configured to perform pseudo halftone processing by dithering with respect to an input image, and generate a halftone image constituted by plural dots, and a threshold matrix holding unit configured to hold a threshold matrix used for the pseudo halftone processing, wherein in the threshold matrix, thresholds are arranged such that the halftone image has a density region in which dots to be formed depending on a density of the input image are not rotational symmetric on a 90° basis, and orientations of the dots differ from each other in the density region.
Claims15
An image processing apparatus which performs image processing for print processing, comprising:
- a pseudo halftone processing unit configured to perform pseudo halftone processing by dithering with respect to an input image, and generate a halftone image constituted by plural dots, and
- a threshold matrix holding unit configured to hold a threshold matrix used for the pseudo halftone processing,
- wherein
- in the threshold matrix, thresholds are arranged such that the halftone image has a density region in which dots to be formed depending on a density of the input image are not rotational symmetric on a 90° basis, and orientations of the dots differ from each other in the density region.
A method for performing pseudo halftone processing by dithering with respect to an input image, and generating a halftone image constituted by plural dots, wherein
- in a threshold matrix used for the pseudo halftone processing, thresholds are arranged such that the halftone image has a density region in which dots to be formed depending on a density of the input image are not rotational symmetric on a 90° basis, and orientations of the dots differ from each other in the density region.
A non-transitory computer readable storage medium storing a program for causing a computer to perform a method for controlling an image processing apparatus which performs pseudo halftone processing by dithering with respect to an input image, and generates a halftone image constituted by plural dots, the control method comprising the steps of;
- in a threshold matrix used for the pseudo halftone processing, thresholds are arranged such that the halftone image has a density region in which dots to be formed depending on a density of the input image are not rotational symmetric on a 90° basis, and orientations of the dots differ from each other in the density region.
Dependencies are inferred from the claim text.