Image checking device, image checking method, and image checking program
AssigneeGlory Ltd.
InventorsToru Yonezawa, Hirofumi Kameyama
Life of this patent
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Abstract
A correlation value image is generated from an input image and a template image, and separated into a positive correlation value image and a negative correlation value image. The template image is separated into a positive template image and a negative template image. A plurality of positive-negative-separated correlation images are generated by combining the positive correlation value image and the negative correlation value image and the positive template image and the negative template image. A polar-coordinates-converted input image and a polar-coordinates-converted template image are employed as the input image and the template image, respectively.
Claims34
1-29. (canceled)
An image verifying apparatus that verifies an image by comparing features of images between an input image of an object to be verified and a plurality of template images registered in advance, the image verifying apparatus comprising:
- a correlation-value-image separating unit that generates a correlation value image from the input image and the template image, and separates the correlation value image into a positive correlation value image and a negative correlation value image depending on whether a pixel value is equal to or larger than a threshold;
- a template-image separating unit that separates the template image into a positive template image and a negative template image depending on whether a pixel value is equal to or larger than a threshold;
- a positive-negative-separated-correlation-image generating unit that generates a plurality of positive-negative-separated correlation-images by combining the positive correlation value image and the negative correlation value image with the positive template image and the negative template image;
- and
- a verification determining unit that performs a verification determination based on the positive-negative-separated correlation images.
An image verifying apparatus that verifies an image by comparing features of images between an input image of a circular object and a plurality of template images registered in advance, the image verifying apparatus comprising:
- a polar-coordinates-converted-image generating unit that performs a polar-coordinates conversion of the input image and the template image, and generates a ρ-θ input image and a ρ-θ template image for which a deviation of rotation between the images is compensated;
- a correlation-value-image separating unit that generates a correlation value image from the ρ-θ input image and the ρ-θ template image, and separates the correlation value image into a positive correlation value image and a negative correlation value image depending on whether a pixel value is equal to or larger than a threshold;
- a template-image separating unit that separates the ρ-θ template image into a positive template image and a negative template image depending on whether a pixel value is equal to or larger than a threshold;
- a positive-negative-separated-correlation-image generating unit that generates a plurality of positive-negative-separated correlation-images by combining the positive correlation value image and the negative correlation value image with the positive template image and the negative template image;
- and
- a verification determining unit that performs a verification determination based on the positive-negative-separated correlation images.
An image verifying method of verifying an image by comparing features of images between an input image of an object to be verified and a plurality of template images registered in advance, the image verifying method comprising:
- correlation-value-image separating including
- generating a correlation value image from the input image and the template image;
- and
- separating the correlation value image into a positive correlation value image and a negative correlation value image depending on whether a pixel value is equal to or larger than a threshold;
- template-image separating including
- separating the template image into a positive template image and a negative template image depending on whether a pixel value is equal to or larger than a threshold;
- positive-negative-separated-correlation-image generating including
- generating a plurality of positive-negative-separated correlation-images by combining the positive correlation value image and the negative correlation value image with the positive template image and the negative template image;
- and
- verification determining including
- performing a verification determination based on the positive-negative-separated correlation images.
An image verifying method of verifying an image by comparing features of images between an input image of a circular object and a plurality of template images registered in advance, the image verifying method comprising:
- polar-coordinates-converted-image generating including
- performing a polar-coordinates conversion of the input image and the template image;
- and
- generating aρ-θ input image and aρ-θ template image for which a deviation of rotation between the images is compensated;
- correlation-value-image separating including
- generating a correlation value image from the ρ-θ input image and theρ-θ template image;
- and
- separating the correlation value image into a positive correlation value image and a negative correlation value image depending on whether a pixel value is equal to or larger than a threshold;
- template-image separating including
- separating the ρ-θ template image into a positive template image and a negative template image depending on whether a pixel value is equal to or larger than a threshold;
- positive-negative-separated-correlation-image generating including
- generating a plurality of positive-negative-separated correlation-images by combining the positive correlation value image and the negative correlation value image with the positive template image and the negative template image;
- and
- verification determining including
- performing a verification determination based on the positive-negative-separated correlation images.
An image verifying program for verifying an image by comparing features of images between an input image of an object to be verified and a plurality of template images registered in advance, the image verifying program causing a computer to execute:
- correlation-value-image separating including
- generating a correlation value image from the input image and the template image;
- and
- separating the correlation value image into a positive correlation value image and a negative correlation value image depending on whether a pixel value is equal to or larger than a threshold;
- template-image separating including
- separating the template image into a positive template image and a negative template image depending on whether a pixel value is equal to or larger than a threshold;
- positive-negative-separated-correlation-image generating including
- generating a plurality of positive-negative-separated correlation-images by combining the positive correlation value image and the negative correlation value image with the positive template image and the negative template image;
- and
- verification determining including
- performing a verification determination based on the positive-negative-separated correlation images.
An image verifying program for verifying an image by comparing features of images between an input image of a circular object and a plurality of template images registered in advance, the image verifying program causing a computer to execute:
- polar-coordinates-converted-image generating including
- performing a polar-coordinates conversion of the input image and the template image;
- and
- generating a ρ-θ input image and a ρ-θ template image for which a deviation of rotation between the images is compensated;
- correlation-value-image separating including
- generating a correlation value image from the ρ-θ input image and the ρ-θ template image;
- and
- separating the correlation value image into a positive correlation value image and a negative correlation value image depending on whether a pixel value is equal to or larger than a threshold;
- template-image separating including
- separating the ρ-θ template image into a positive template image and a negative template image depending on whether a pixel value is equal to or larger than a threshold;
- positive-negative-separated-correlation-image generating including
- generating a plurality of positive-negative-separated correlation-images by combining the positive correlation value image and the negative correlation value image with the positive template image and the negative template image;
- and
- verification determining including
- performing a verification determination based on the positive-negative-separated correlation images.
Dependencies are inferred from the claim text.