Image processing apparatus, an image processing method, and a program thereof for handling a copy-forgery-inhibited pattern image
AssigneeCanon Kabushiki Kaisha
InventorJunya Arakawa
Life of this patent
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Abstract
In prior art, there are some occasions where functions of a copy-forgery-inhibited pattern are impaired when printed on a sheet after rotation because of the level difference appearing between the density level of a latent image portion and the density level of a background portion of a copy-forgery-inhibited pattern. To cope with the problem, the image processing apparatus which has a generating unit for generating copy-forgery-inhibited pattern image data and a rotation unit for rotating the generated copy-forgery-inhibited pattern image data, wherein the generating unit generates the copy-forgery-inhibited pattern image data to be rotated by the rotation unit in accordance with a rotation angle in the rotation unit.
Claims9
A printing apparatus comprising a printing unit configured to print images on paper and to output the paper on which the images have been printed, the printing apparatus comprising;
- a generating unit configured to generate copy-forgery-inhibited pattern image data;
- and
- a rotation unit configured to rotate the generated copy-forgery-inhibited pattern image data in accordance with an output direction of paper,
- wherein the printing unit prints the generated and rotated copy-forgery-inhibited pattern image data or the generated and non-rotated copy-forgery-inhibited pattern image data on paper and outputs, in accordance with an output direction of the paper, the paper on which the generated and rotated copy-forgery-inhibited pattern image data or the generated and non-rotated copy-forgery-inhibited pattern image data has been printed,
- wherein the generating unit includes plural dithering matrices for generating copy-forgery-inhibited pattern image data, and
- wherein the plural dithering matrices include dithering matrices used for generating copy-forgery-inhibited pattern image data to be rotated by the rotation unit and dithering matrices used for generating copy-forgery-inhibited pattern image data not to be rotated by the rotation unit.
An image processing method, implemented by a printing apparatus, the printing apparatus comprising a printing unit that prints images on paper and outputs the paper on which the images have been printed, the method comprising:
- a generating step of generating copy-forgery-inhibited pattern image data;
- and
- a rotation step of rotating the generated copy-forgery-inhibited pattern image data in accordance with an output direction of paper,
- wherein the printing unit prints the generated and rotated copy-forgery-inhibited pattern image data or the generated and non-rotated copy-forgery-inhibited pattern image data on paper and outputs, in accordance with an output direction of the paper, the paper on which the generated and rotated copy-forgery-inhibited pattern image data or the generated and non-rotated copy-forgery-inhibited pattern image data has been printed,
- wherein plural dithering matrices are adapted for generating copy-forgery-inhibited pattern image data in the generating step, and
- wherein the plural dithering matrices include dithering matrices used for generating copy-forgery-inhibited pattern image data to be rotated in the rotation step and dithering matrices used for generating copy-forgery-inhibited pattern image data not to be rotated in the rotation step.
A non-transitory computer readable medium storing a computer program for causing a computer to function as a printing apparatus, the printing apparatus comprising:
- a printing unit configured to print images on paper and to output the paper on which the images have been printed;
- a generating unit configure to generate copy-forgery-inhibited pattern image data;
- and
- a rotation unit configured to rotate the generated copy-forgery-inhibited pattern image data in accordance with an output direction of paper,
- wherein the printing unit prints the generated and rotated copy-forgery-inhibited pattern image data or the generated and non-rotated copy-forgery-inhibited pattern image data on paper and outputs, in accordance with an output direction of the paper, the paper on which the generated and rotated copy-forgery-inhibited pattern image data or the generated and non-rotated copy-forgery-inhibited pattern image data has been printed,
- wherein the generating unit includes plural dithering matrices for generating copy-forgery-inhibited pattern image data, and
- wherein the plural dithering matrices include dithering matrices used for generating copy-forgery-inhibited pattern image data to be rotated by the rotation unit and dithering matrices used for generating copy-forgery-inhibited pattern image data not to be rotated by the rotation unit.
Dependencies are inferred from the claim text.