Biometric imaging method and device
AssigneeEyesmart Technology Ltd.
InventorXiaopeng Wang
Life of this patent
Estimating the term…
Abstract
It is an objective of the present invention to provide a biometric imaging device comprising an optical lens component for performing optical imaging (including static image and dynamic image) on a biometric of a region of interest; an image sensor for converting an optical image of said biometric into an electronic image (including static image and dynamic image); and a micromotor controller for acquiring, delivering, or analyzing image quality information of the electronic image, analyzing in real time the definition of the image according to the image quality information of the electronic image, and feeding back said information in real time so as to adjust the optical lens component to perform autofocus control of the biometric of the region of interest.
Claims25
A biometric imaging device (100), comprising:
- an optical lens component (110) for performing optical imaging on a biometric (12) in a region of interest (13);
- an image sensor (120) for converting an optical image comprising said biometric (12) into an electronic image;
- a micromotor (140) for adjusting said optical lens component (110);
- a micromotor controller (130) for acquiring image quality information of said electronic image, and controlling said micromotor (140) to adjust said optical lens component (110) according to the image quality information of said electronic image so as to perform autofocus control of the biometric (12) of said region of interest (13), wherein the image quality information comprises at least one of contrast, average gray scale, image information entropy, pupil diameter, iris diameter, and horizontal eye width;
- and
- at least one lighting component (150) that employs near infrared light having different center spectrums of 780 nm, 850 nm and 940 nm respectively for illuminating.
A biometric imaging method, comprising:
- acquiring an image (310) of a biometric of a region of interest as captured by an optical lens component;
- acquiring image quality information (320) of said image;
- controlling a micromotor to adjust the optical lens component according to the image quality information of said image so as to perform autofocus control (330) of the biometric (12) of said region of interest (13), wherein the image quality information comprises at least one of contrast, average gray scale, image information entropy, pupil diameter, iris diameter, and horizontal eye width;
- and further comprises:
- employing near infrared light having different center spectrums of 780 nm, 850 nm and 940 nm respectively for illuminating.
Dependencies are inferred from the claim text.