US 2003/0152251 A1 · Method and apparartus for picking up object being authenticated

Abstract

The number of high luminance lines whose luminance value is equal to or greater than a predetermined value among the lines contained in a thinned image of an image picked up by a telephoto camera oriented toward the iris position of an authentication object is compared with a set value. In case the number of high luminance lines equal to or greater than the set value exists, an iris illuminating direction is switched to obtain the illuminating direction where the number of high luminance lines is smaller than the set value, the iris is illuminated in the illuminating direction thus obtained and a focus position of the iris is searched for using a thinned image of an image picked up by the telephoto camera to acquire an iris image as an object of authentication. This rapidly acquires an iris image containing only a small amount of illuminating light.

Claims10

Dependent claims

An authentication object image pickup method comprising:

comparing the number of high luminance lines whose luminance value is equal to or larger than a predetermined value among the lines contained in a picked up image of an authentication object, with a set value;
changing an illuminating direction of the authentication object to obtain the illuminating direction where the number of the high luminance lines is smaller than the set value, when the number of the high luminance lines is equal to or larger than the set value,;
and
acquiring an image of the authentication object by illuminating the authentication in the illuminating direction obtained.

1 more element

An authentication object image pickup apparatus, comprising:

a camera for picking up an image of an authentication object;
means for extracting an image from image pickup means of the camera;
means for comparing the number of high luminance lines whose luminance value is equal to or larger than a predetermined value among the lines contained in the picked up image with a set value, and determining whether the number of high luminance lines whose luminance value is equal to or larger than the set value;
means for changing the illuminating direction of the authentication object to acquire the illuminating direction where the number of the high luminance lines is smaller than the set value when the number of the high luminance lines is equal to or larger than the set value;
and
means for acquiring an image of the authentication object by illuminating the authentication object in the illuminating direction obtained by the means for changing the illuminating direction.

3 more elements

Dependencies are inferred from the claim text.

Method and apparartus for picking up object being authenticated

Life of this patent

Method and apparartus for picking up object being authenticated

Life of this patent

Abstract

Claims10