Image processing apparatus and method evaluating print quality based on density difference data
AssigneeCanon Kabushiki Kaisha
InventorsKyohei Kikuta, Kosei Takahashi
Life of this patent
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Abstract
There is provided with an information processing apparatus. A first obtaining unit obtains data of a reference image indicating a target of printing output to be performed by a printing apparatus. A second obtaining unit obtains data of an image printed by the printing apparatus. A correcting unit corrects a local image density difference or the reference image based on a global image density difference between the reference image and the printed image. An evaluating unit evaluates quality of the printed image based on the local image density difference between the corrected reference image and the printed image.
Claims18
An information processing apparatus comprising:
- a memory storing instructions;
- and
- a processor that implements the instructions to execute a plurality of tasks, including:
- an obtaining task that obtains data of a reference image indicating a target of printing output to be performed by a printing apparatus and data of a printed image printed by the printing apparatus;
- and
- an evaluating task that evaluates quality of the printed image based on:
- a local image density difference between the reference image and the printed image;
- and
- a global image density difference between the reference image and the printed image.
In information processing apparatus comprising:
- a memory storing instructions;
- and
- a processor that implements the instructions to:
- obtain data of a reference image indicating a target of printing output to be performed by a printing apparatus;
- obtain data of a printed image by reading an image printed by the printing apparatus;
- generate difference data using:
- a first image density difference between:
- a pixel in a position of a pixel of interest in the reference image;
- and
- a pixel in the position of a pixel of interest in the printed image;
- and
- a third image density difference obtained by subtracting, from the first image density difference, a second image density difference between:
- a region containing the pixel in the position of the pixel of interest in the reference image;
- and
- a region containing the pixel in the position of the pixel of interest in the printed image;
- and
- evaluate quality of the printed image based on the difference data.
An information processing method comprising:
- obtaining data of a reference image indicating a target of printing output to be performed by a printing apparatus and data of a printed image printed by the printing apparatus;
- and
- evaluating quality of the printed image based on:
- a local image density difference between the reference image and the printed image;
- and
- a global image density difference between the reference image and the printed image.
An information processing method comprising:
- obtaining data of a reference image indicating a target of printing output to be performed by a printing apparatus;
- obtaining data of a printed image by reading an image printed by the printing apparatus;
- generating difference data using:
- a first image density difference between:
- a pixel in a position of a pixel of interest in the reference image:, and
- a pixel in the position of a pixel of interest in the printed image;
- and
- a third image density difference obtained by subtracting, from the first image density difference, a second image density difference between:
- a region containing the pixel in the position of the pixel of interest in the reference image;
- and
- a region containing the pixel in the position of the pixel of interest in the printed image;
- and
- evaluating quality of the printed image based on the difference data.
Dependencies are inferred from the claim text.