摘要:
A biometric authentication device that authenticates a user using biological features of the user, the biometric authentication device includes: an illumination unit configured to illuminate a target which represents the biological features; an image sensor configured to obtain a first captured image by capturing the target illuminated by the illumination unit, and obtain a second captured image by capturing the target not illuminated by the illumination unit; an acquisition unit configured to acquire from a storage unit a mask which has a target area approximating the shape of the target in the first and second captured images obtained by the image sensor; and a detection unit configured to detect light other than illumination light illuminated by the illumination unit based on the mask acquired by the acquisition unit and at least one of the first and second images.
摘要:
A biometric-information processing device includes an image acquisition unit configured to acquire an image of a biometric object using light reflected from the biometric object. The biometric-information processing device further includes an extracting unit configured to extract a frequency component having a frequency higher than a predetermined spatial frequency at the image acquired by the image acquisition unit.
摘要:
A shock absorbing device for a rack and pinion type steering device includes a rack shaft, a rack housing, a stopper portion formed in an end part of the rack shaft, a stopper engaging portion provided on the rack housing to define a stroke end position for the rack shaft by engaging the stopper portion, a stepped portion formed on the rack shaft, a shoulder portion formed in an enlarged diameter portion of the rack housing, and a cylindrical elastic member fitted on the rack shaft such that the elastic member is pressed in the axial direction of the rack shaft by the stepped portion and the shoulder portion. The elastic member is formed with grooves on each of an outer circumferential surface and an inner circumferential surface thereof. Such shock absorbing device for a rack and pinion type steering device has a high shock absorbing capability.
摘要:
A disclosed capture device for biometrics authentication using an image of a person's palm includes an image sensor capturing the person's palm and acquiring an image of the person's palm and a guide member supporting the person's palm when the person's palm is captured by the image sensor. Further, the guide member has a V-shaped-type groove in which a finger of the person's palm is to be inserted.
摘要:
A biometric authentication device includes, an acquisition unit configured to repeatedly image a biological part of an authenticated person while changing a relative position with respect to the biological part so as to acquire time-series biological images; a detection unit configured to detect a pixel corresponding among the biological images from the time-series biological images; an extraction unit configured to extract a pixel of which a pixel value includes a surface reflection component from the biological part, from each of the time-series biological images, on the basis of a degree of divergence of temporal variation of a pixel value of the detected pixel in the time-series biological images from an estimation result of temporal variation; a generation unit configured to correct the pixel value of the extracted pixel on the basis of a pixel value; and an authentication unit configured to perform personal authentication of the authenticated person.
摘要:
A shock absorbing device for a rack and pinion type steering device includes a rack shaft, a rack housing, a stopper portion formed in an end part of the rack shaft, a stopper engaging portion provided on the rack housing to define a stroke end position for the rack shaft by engaging the stopper portion, a stepped portion formed on the rack shaft, a shoulder portion formed in an enlarged diameter portion of the rack housing, and a cylindrical elastic member fitted on the rack shaft such that the elastic member is pressed in the axial direction of the rack shaft by the stepped portion and the shoulder portion. The elastic member is formed with grooves on each of an outer circumferential surface and an inner circumferential surface thereof. Such shock absorbing device for a rack and pinion type steering device has a high shock absorbing capability.
摘要:
A passage authorization system includes a plurality of gate management apparatuses that are individually provided with authentication sensors for acquiring biometric data from a presented hand and form paths, an authentication unit configured to output a result of authentication comparison performed with the biometric data acquired by each of the authentication sensors and a hand determination result of determining whether the biometric data is data of a left hand or a right hand, and a control unit configured to control opening/closing of a gate corresponding to the hand determination result on the basis of the result of authentication comparison.
摘要:
An image processing apparatus includes a first image acquisition section that acquires a first image of an object at illumination-off time, a second image acquisition section that acquires a second image of the object at illumination-on time, a difference image generation section that generates a difference image based on a difference between luminance of each of pixels constituting the first image and luminance of each of pixels constituting the second image, a high-luminance area extraction section that extracts an image area constituted by pixels having a luminance value which is equal to or more than a predetermined luminance value from the difference image, and a movement determination section that determines a movement amount of the object between image take timing of the first image and image take timing of the second image based on the image area.
摘要:
A disclosed capture device for biometrics authentication using an image of a person's palm includes an image sensor capturing the person's palm and acquiring an image of the person's palm and a guide member supporting the person's palm when the person's palm is captured by the image sensor. Further, the guide member has a V-shaped-type groove in which a finger of the person's palm is to be inserted.
摘要:
An image forming apparatus causes an illuminating unit and an imaging unit to equally split a predetermined exposure time into a plurality of split exposure times, and acquire an image with illumination and an image without illumination in each of the split exposure time. A luminance difference image for a particular split exposure time is calculated by subtracting the image without illumination from the image with illumination of the exposure time. The luminance difference images of all the split exposure times are integrated.