System and method for acquiring images of veins of a finger
AssigneeMorpho
InventorsMichel CRUCHAGA, Sylvaine PICARD
Life of this patent
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Abstract
A system for acquiring an image of veins of a finger includes a camera designed to acquire an image of said finger when it is passed in front of it, a lighting device designed to illuminate said finger and a control unit for controlling the illumination intensity of said lighting device. Also, at least one system measures the transmission power of said finger upstream of the camera with respect to the passage of said finger towards said camera, said control unit being designed to control the illumination intensity of said lighting device according to the transmission power measured by said measuring system. Additionally, a method for acquiring images of veins of a finger is provided.
Claims11
An acquisition system for acquiring an image of veins of a finger, comprising
- a camera designed to acquire an image of said finger when it is passed in front of it, a lighting device designed to illuminate said finger;
- a control unit for controlling the intensity of illumination of said lighting device;
- and
- at least one system for measuring the transmission power of said finger;
- upstream of the camera with respect to the passage of said finger towards said camera,
- wherein said control unit is designed to control the illumination intensity of said lighting device according to the transmission power measured by said measuring system.
An acquisition method for acquiring an image of veins of a finger implemented by means of an acquisition system comprising a camera designed to acquire an image of said finger when it is passed in front of it and a lighting device for illuminating said finger, said method comprising;
- a step of adjusting the intensity of illumination of said lighting device;
- a step of acquisition of said image by said camera;
- and
- a step of measuring the transmission power of said finger implemented prior to the presentation of said finger in front of the camera,
- wherein said step of adjusting said lighting device comprises controlling the illumination intensity of said lighting device according to the transmission power measured at the measuring step.
Dependencies are inferred from the claim text.