Image processing apparatus, image processing method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorKenichirou Haruta
Life of this patent
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Abstract
Jaggies in an edge portion are reduced while suppressing deterioration of an image to a minimum. There are provided a determination unit configured to determine an edge of an object from input image data, a unit configured to generate edge correction data used to correct a pixel value of a pixel constituting the edge, a screen data generation unit configured to generate screen data by performing screen processing on the input image dada, and an image combination unit configured to generate output image in which a screen dot existing in the edge in the screen data is shifted into the inside of the object.
Claims2
1-13. (canceled)
An image processing apparatus comprising:
- a detection unit configured to detect an edge portion of an object in first image data to generate edge information corresponding to a pixel of the first image data;
- a performing unit configured to perform dither processing using a dither matrix for the first image data to generate second image data;
- and
- with respect to a pixel on the edge portion of the object in the first image data, perform outputting edge correction data based on a value of the pixel;
- and
- with respect to a neighboring area of the edge portion, the neighboring area is included in the object in the first image data,
- in a case where a value of a pixel in the second image data corresponding to the pixel of the neighboring area is not 0, perform outputting data obtained by using a value of the pixel of the neighboring area in the first image data and a first correction property, and
- in a case where a value of pixel in the second image data corresponding to the pixel of the neighboring area is 0 and a value of a neighboring pixel of the pixel in the second image data is not 0 and edge information corresponding to the neighboring pixel indicates the edge portion, perform outputting data obtained by using a value of the pixel of the neighboring area in the first image data and a second correction property.
Dependencies are inferred from the claim text.