Abstract: A determination method for a computer to execute a process includes acquiring a captured image that is captured by a camera and includes an image area of a person; specifying an image area other than the image area of the person from the acquired captured image; and determining whether the captured image is obtained by capturing a display object of the person according to a distribution of motions of a plurality of positions included in the specified image area.

Abstract: A monitoring system includes a memory, and a processor coupled to the memory and configured to detect a face area of a subject from a captured image divided into a plurality of blocks according to a number of light emitting elements that irradiate an image capturing range, and control a light emission intensity of a light emitting element corresponding to a block including the face area among the plurality of blocks according to one of a position of the face area and a size of the face area.

Abstract: An authentication method implemented by a computer, the method including: accepting biometric information to be authenticated detected by a first sensor; specifying one person included in one or more persons, based on a movement of each of the one or more persons, in a case where the one or more persons are detected by a second sensor at the time of detecting the biometric information to be authenticated; selecting registered biometric information associated with registered face image information that is similar to face image information of the one person, from among registered biometric information associated with each of a plurality of pieces of registered face image information; and authenticating the biometric information to be authenticated, based on a comparison result of comparing the biometric information to be authenticated with the selected registered biometric information.

Abstract: An authentication method executed by a computer, the authentication method includes obtaining a captured image captured by a camera; selecting one facial image from a plurality of facial images based on a position of each of the plurality of facial images included in the captured image; referring to a memory that stores pieces of biometric information associated with the respective plurality of facial images; specifying a piece of the biometric information associated with a facial image in which a degree of similarity to the selected facial image satisfies a criterion; and performing, when biometric information detected by a sensor is received, authentication based on verification of the specified piece of the biometric information against the received biometric information.

Abstract: An authentication method including: accepting biometric information to be authenticated detected by a biometric sensor; specifying, on a basis of an orientation of a line of sight or an orientation of a face of one or more persons that appear in a captured image captured by an imaging device at a time of detecting the biometric information to be authenticated, a face image of any one of the persons included in the captured image; selecting registered biometric information associated with registered face image information similar to the specified face image from among pieces of registered biometric information respectively associated with a plurality of pieces of registered face image information; and authenticating the biometric information to be authenticated on a basis of a comparison result of comparing the biometric information to be authenticated with the selected registered biometric information.

Abstract: An authentication device includes an illumination device, a camera, and a processor configured to obtain, by capturing by the camera, an image including a subject illuminated with light of the illumination device, extract a target region from the obtained image, and perform determination that processing related to authentication is not allowed when the target region includes a first part of a first luminance value having a difference not less than a threshold value from a second luminance value of a second part of the target region.

Abstract: A biometric-image processing apparatus includes a touch panel, a memory, an image-capturing device configured to capture an image of a living body that is in contact with the touch panel to obtain a biometric image, and a processor coupled to the memory. The processor is configured to execute a process including: calculating a distance between the image-capturing device and the living body, and calculating a rotation angle of the living body to the image-capturing device based on the distance.

Abstract: A living body sensor obtains a plurality of living body images along an authentication-target living body, and a shape sensor obtains shape information corresponding to each of the plurality of living body images. A processor determines a position of a part of the authentication-target living body captured in each of the plurality of living body images, according to the shape information corresponding to each of the plurality of living body images. The processor compares a biometric feature of each of the plurality of living body images and a registered biometric feature by using a determined position of the part of the authentication-target living body and performs authentication for the authentication-target living body according to a comparison result of comparing the biometric feature of each of the plurality of living body images and the registered biometric feature.

Abstract: A monitoring system includes a memory, and a processor coupled to the memory and configured to detect a face area of a subject from a captured image divided into a plurality of blocks according to a number of light emitting elements that irradiate an image capturing range, and control a light emission intensity of a light emitting element corresponding to a block including the face area among the plurality of blocks according to one of a position of the face area and a size of the face area.

Abstract: A camera captures an image of a subject, and a light source illuminates with light a plane intersecting an optical axis of the camera at a prescribed angle. The processor generates guidance information related to a distance between the subject and the light source on the basis of a pixel value distribution of the image of the subject which is illuminated with the light, and outputs the generated guidance information.

Abstract: A biometric image processing apparatus includes a touch panel, an biometric sensor configured to capture an image of a living body, and a processor. The processor performs a process including first calculating an amount of movement of the living body that moves on the touch panel while coming into contact with the touch panel, second calculating an amount of movement of each region in images captured by the biometric sensor in a period in which the living body moves on the touch panel while coming into contact with the touch panel, and detecting image noise in the captured images based on the respective amounts of movement calculated by the first calculating and the second calculating.

Abstract: A biometric authentication apparatus includes an imaging device, a display device, a memory, and a processor configured to display, on a screen of the display device, a guidance indicating a target area to be in contact with a part of a human body, detect whether the part of the human body is in contact with the target area, when the part of the human body is in contact with the target area, determine a distance between the imaging device and another part of the human body in accordance with an image captured by the imaging device, the image including the other part of the human body, and perform a change of a display position of the guidance in accordance with the determined distance.

Abstract: An image processing apparatus includes a memory and a processor configured to acquire an image in which a subject is captured by a camera, calculate a plurality of spatial frequency characteristics on the basis of each of a plurality of regions included in the image, and perform determination of a tilt of the subject with respect to the camera in accordance with the plurality of spatial frequency characteristics.

Abstract: A computer-implemented method for image processing, the method includes: acquiring an image of a body part captured by an imaging circuit; and determining, in a case where there is a region where luminance is saturated in the acquired image, a cause of the saturation of the luminance based on a distribution of the luminance in the acquired image. The cause is either the distance between the imaging circuit and the body part being shorter than a predetermined distance or an influence of external light.

Abstract: A disclosed illumination apparatus includes first and second light sources that generate light for an illumination area to be illuminated; a first substrate on which the first and second light sources are mounted; and a second substrate that is disposed in an illumination direction of the light of the first and second light sources with respect to the first substrate, the second substrate having first and second diffraction grating elements formed integrally therewith, the first diffraction grating element being provided for the first light source, and the second diffraction grating element being provided for the second light source.

Abstract: A processor obtains characteristics information of a biometric image captured while casting first or second illumination light onto an authentication target. The first illumination light includes light of a first wavelength, and the second illumination light includes light of the first wavelength and light of a second wavelength. The processor reads characteristics information of a biometric image captured while casting illumination light cast onto the authentication target from a memory that stores first characteristics information of a first biometric image and second characteristics information of a second biometric image. The first biometric image is captured while casting the first illumination light onto a registration target, and the second biometric image is captured while casting the second illumination light onto the registration target.

Abstract: A living body sensor obtains a plurality of living body images along an authentication-target living body, and a shape sensor obtains shape information corresponding to each of the plurality of living body images. A processor determines a position of a part of the authentication-target living body captured in each of the plurality of living body images, according to the shape information corresponding to each of the plurality of living body images. The processor compares a biometric feature of each of the plurality of living body images and a registered biometric feature by using a determined position of the part of the authentication-target living body and performs authentication for the authentication-target living body according to a comparison result of comparing the biometric feature of each of the plurality of living body images and the registered biometric feature.

Abstract: A biometric image processing device includes: a memory; and a processor coupled to the memory and the processor configured to execute a process, the process comprising: capturing a biometric image of an object by a camera; obtaining a histogram of brightness values from the biometric image; correcting the biometric image by expanding a dynamic range of a partial histogram of the histogram of which an appearance frequency is equal to or more than a threshold; and calculating a distance between the camera and the object on a basis of a high frequency component of the biometric image corrected in the correcting.

Abstract: A biometric authentication apparatus includes: a biometric sensor configured to capture an image of a hand of a user; a touch panel configured to output a contact signal indicating contact positions of fingers of the user in response to the reception of an operation by the fingers of the user; and control circuitry configured to display, on the touch panel, a plurality of marks each of which indicates position at which any of the fingers of the user is intended to come into contact with the touch panel, acquire the contact signal output from the touch panel, and reduce in size one or more marks among the plurality of marks during acquiring biometric information from the image captured by the biometric sensor when the control circuitry detects, in accordance with the contact signal, that the fingers of the user are in contact with the plurality of marks.

Abstract: A method includes acquiring, from a touch panel, a contact position of a manipulating body and contact information that indicates a degree to which the manipulating body is in contact at the contact position, acquiring, from a camera, a plurality of images captured while the manipulating body is in contact with a plurality of mutually different positions on the touch panel due to manipulations with the manipulating body, creating variation information that indicates a variation in contact information, according to a plurality of contact information corresponding to the plurality of contact positions, and deciding, according to the variation information, suitability of the plurality of images in the biometric authentication to be executed using the plurality of images.