Biometric-information processing device, method of processing biometric information, and computer-readable recording medium storing biometric-information processing program

A biometric-information processing device comprising:na sensor configured to acquire an image of a biometric object using light reflected from the biometric object; anda processor configured to extract a frequency component having a frequency higher than a predetermined spatial frequency at the image,wherein the processor is further configured to carry out authentication processing using the image acquired by the sensor to determine a first index value of a surface reflection component of the biometric object from the frequency component extracted by the processor and to determine whether the authentication processing is to be carried out on the basis of the first index value, andwherein the frequency component is extracted from a light reflected at a surface of the biometric object, and is separated from another light reflected at a vein in the biometric object.

A method of processing biometric information comprising:nacquiring an image of a biometric object using light reflected at the biometric object;extracting, by a processor, a frequency component having a frequency higher than a predetermined spatial frequency from the image acquired in the acquiring;carrying out an authentication process using the acquired image;determining a first index value of a surface reflection component of the biometric object from the frequency component extracted by the processor; anddetermining whether the authentication processing is to be carried out on the basis of the first index value,wherein the frequency component is extracted from a light reflected at a surface of the biometric object, and is separated from another light reflected at a vein in the biometric object.

A computer-readable storage medium storing a biometric-information processing program that causes a computer to execute a process comprising:nacquiring an image of a biometric object using light reflected from the biometric object;extracting frequency component having a frequency higher than a predetermined spatial frequency from the image acquired by the image acquisition unit;carrying out an authentication process using the acquired image;determining a first index value of a surface reflection component of the biometric object from the frequency component extracted by the processor; anddetermining whether the authentication processing is to be carried out on the basis of the first index value,wherein the frequency component is extracted from a light reflected at a surface of the biometric object, and is separated from another light reflected at a vein in the biometric object.