Face image pickup device and method
First Claim
1. A face image pickup device comprising:
- face image pickup unit which picks up an image of a face of a target person;
illumination unit which illuminates the face of the target person with near-infrared light having an arbitrary light amount;
eye area detecting means which detects an area including an eye from the face image of the target person picked up by the face image pickup unit;
brightness-distribution measuring unit which measures a brightness distribution in the area detected by the eye area detecting unit in the face image of the target person picked up by the face image pickup means; and
control unit which controls the illumination unit so as to increase an amount of the near-infrared light when an average brightness is greater that a predetermined range by calculating the average brightness in the area based on the brightness distribution measured by the brightness-distribution measuring unit.
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Accused Products
Abstract
There are provided a face image pickup device and a face image pickup method which can stably acquire a face image by appropriate illumination, and a program thereof. The face image pickup device comprises a camera which picks up an image of a face of a target person, an illumination light source which illuminates the face of the target person with near-infrared light having an arbitrary light amount, and a computer. The computer detects an area including an eye from the face image of the target person picked up by the camera. The computer measures a brightness distribution in the detected area. Thereafter, the computer controls the illumination light source so as to change the amount of near-infrared light based on the measured brightness distribution.
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Citations
10 Claims
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1. A face image pickup device comprising:
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face image pickup unit which picks up an image of a face of a target person; illumination unit which illuminates the face of the target person with near-infrared light having an arbitrary light amount; eye area detecting means which detects an area including an eye from the face image of the target person picked up by the face image pickup unit; brightness-distribution measuring unit which measures a brightness distribution in the area detected by the eye area detecting unit in the face image of the target person picked up by the face image pickup means; and control unit which controls the illumination unit so as to increase an amount of the near-infrared light when an average brightness is greater that a predetermined range by calculating the average brightness in the area based on the brightness distribution measured by the brightness-distribution measuring unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A face image pickup method executed by a device comprising a face image pickup unit which picks up an image of a face of a target person and an illumination means which illuminates the face of the target person with a near-infrared light having an arbitrary light amount, the method comprising:
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an eye area detecting step of detecting an area including an eye from the face image of the target person picked up by the face image pickup means; a brightness-distribution measuring step of measuring a brightness distribution in the area detected in the eye area detecting step in the face image of the target person picked up by the face image pickup means; and a control step of controlling the illumination means so as to increase an amount of the near-infrared light when an average brightness is greater than a predetermined range by calculating the average brightness in the area based on the brightness distribution measured in the brightness-distribution measuring step.
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10. A non-transitory computer-readable medium storing a program allowing a computer which includes a face image pickup unit that picks up an image of a face of a target person and an illumination unit that illuminates the face of the target person with a near-infrared light having an arbitrary light amount to function as:
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an eye area detecting unit which detects an area including an eye from the face image of the target person picked up by the face image pickup unit; a brightness-distribution measuring unit which measures a brightness distribution in the area detected by the eye area detecting unit in the face image of the target person picked up by the face image pickup unit; and a control unit which controls the illumination unit so as to increase an amount of the near-infrared light when an average brightness is greater than a predetermined range by calculating the average brightness in the area based on the brightness distribution measured by the brightness-distribution measuring unit.
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Specification