Method of evaluating image information, storage medium, and image-information evaluating apparatus
AssigneeSeiko Epson Corporation
InventorsMegumi Kanda, Eunice Poon, Ian Clarke
Life of this patent
Estimating the term…
Abstract
The present method of evaluating image information, includes: extracting, from image information to be evaluated, a plurality of edge pixels located in a boundary of an image expressed by the image information; calculating, for each of the edge pixels, a number of pixels that include the edge pixel targeted for calculation, that exist in the boundary, and that are arranged in a direction intersecting with the boundary; and performing out-of-focus blurring evaluation of the image information on the basis of the number of pixels that exist in the boundary and a number of the edge pixels.
Claims16
A method of evaluating image information, comprising;
- extracting, from image information to be evaluated, a plurality of edge pixels located in a boundary of an image expressed by the image information;
- calculating, for each of the edge pixels, a number of pixels that include the edge pixel targeted for calculation, that exist in the boundary, and that are arranged in a direction intersecting with the boundary;
- and
- performing out-of-focus blurring evaluation of the image information on the basis of the number of pixels that exist in the boundary and a number of the edge pixels.
A storage medium having an image-information evaluating program stored therein, the evaluating program comprising:
- a code for causing an arithmetic processing unit to extract, from image information to be evaluated, a plurality of edge pixels located in a boundary of an image expressed by the image information;
- a code for causing the arithmetic processing unit to calculate, for each of the edge pixels, a number of pixels that include the edge pixel targeted for calculation, that exist in the boundary, and that are arranged in a direction intersecting with the boundary;
- and
- a code for causing the arithmetic processing unit to perform out-of-focus blurring evaluation of the image information on the basis of the number of pixels that exist in the boundary and a number of the edge pixels.
An image-information evaluating apparatus comprising:
- a memory for storing image information;
- and
- an arithmetic processing unit, the arithmetic processing unit extracting, from image information to be evaluated, a plurality of edge pixels located in a boundary of an image expressed by the image information,
- calculating, for each of the edge pixels, a number of pixels that include the edge pixel targeted for calculation, that exist in the boundary, and that are arranged in a direction intersecting with the boundary, and
- performing out-of-focus blurring evaluation of the image information on the basis of the number of pixels that exist in the boundary and a number of the edge pixels.
A method of evaluating image information, comprising:
- extracting, from image information to be evaluated, an edge pixel located in a boundary of an image expressed by the image information;
- extracting two pixels sandwiching the edge pixel in a direction intersecting with the boundary, a difference in luminance between each of the two pixels and a pixel adjacent thereto being the largest;
- and
- performing out-of-focus blurring evaluation of the image information on the basis of a distance between the two pixels.
A storage medium having an image-information evaluating program stored therein, the evaluating program comprising:
- a code for causing an arithmetic processing unit to extract, from image information to be evaluated, an edge pixel located in a boundary of an image expressed by the image information;
- a code for causing the arithmetic processing unit to extract two pixels sandwiching the edge pixel in a direction intersecting with the boundary, a difference in luminance between each of the two pixels and a pixel adjacent thereto being the largest;
- and
- a code for causing the arithmetic processing unit to perform out-of-focus blurring evaluation of the image information on the basis of a distance between the two pixels.
An image-information evaluating apparatus comprising:
- a memory for storing image information;
- and
- an arithmetic processing unit, the arithmetic processing unit extracting, from image information to be evaluated, an edge pixel located in a boundary of an image expressed by the image information,
- extracting two pixels sandwiching the edge pixel in a direction intersecting with the boundary, a difference in luminance between each of the two pixels and a pixel adjacent thereto being the largest, and
- performing out-of-focus blurring evaluation of the image information on the basis of a distance between the two pixels.
Dependencies are inferred from the claim text.