Fingerprint minutia display input device, fingerprint minutia display input method, and fingerprint minutia display input program

A fingerprint minutia input method using a fingerprint minutia input device comprising a main device body which outputs a fingerprint image containing fingerprint ridgelines and a pointer for designating a coordinate position of a minutia of the fingerprint image on a display screen, and which sets a minutia display mark for the minutia on the fingerprint image designated by the pointer according to an external command, the method comprising:

• setting, based on an external command, a gray-scale intensity of the entire fingerprint image where the pointer is located, the gray-scale intensity being adjustable within a display gray-scale range between a gray-scale upper limit value and a gray-scale lower limit value from a memory;
• updating a width of the display gray-scale with the fingerprint image when setting the minutia display mark;
• holding the display gray-scale width for outputting the minutia when no new setting information of the width of the display gray-scale is received;
• and
• displaying the set minutia display mark for the minutia of the fingerprint image according to an external command.

A non-transitory computer readable recording medium storing a fingerprint minutia input program for a fingerprint minutia input device comprising a main device body which outputs a fingerprint image containing fingerprint ridgelines and a pointer for designating a coordinate position of a minutia of the fingerprint image on a display screen, and which sets a minutia display mark for the minutia on the fingerprint image designated by the pointer according to an external command, the program, when executed by a processor of the fingerprint minutia input device, causes the processor to:

• selectively reduce gray-scale intensity of the entire fingerprint image where the pointer is located, the gray-scale intensity being within a display gray-scale range between a gray-scale upper limit value and a gray-scale lower limit value from a memory;
• update a width of the display gray-scale with the entire fingerprint image when setting the minutia display mark;
• hold the display gray-scale width for outputting the minutia when no new setting information of the width of the display gray-scale received;
• and
• display the set minutia display mark for the minutia of the fingerprint image according to an external command.