Low power fingerprint capture system, apparatus, and method

A method of generating a composite image of a friction ridge signature of a subject, the method comprising:

• emitting light rays toward a platen comprising a first light-reflecting surface to illuminate a subject placed in contact with the first light-reflecting surface of the platen;
• capturing images of the subject in contact with the first light-reflecting surface of the platen, through the platen, in an ongoing manner;
• executing one or more modules on one or more processors to automatically determine whether a sequence of the captured images includes a successful capture sequence;
• and
• generating, responsive to determination that the sequence of the captured images includes a successful capture sequence, a composite image, wherein the composite image is formed from the images included in the successful capture sequence.

A system configured to generate a composite image of a friction ridge signature of a subject, the system comprising:

• a platen comprising a first light-reflecting surface;
• a light source configured to emit light rays to illuminate a finger of the subject placed in contact with the first light-reflecting surface of the platen;
• a camera configured to capture images of the finger of the subject in contact with the first light-reflecting surface of the platen, through the platen, in an ongoing manner;
• and
• a processor configured to receive images of the finger of the subject captured by the camera and determine whether the finger of the subject is being rolled across the first light-reflecting surface based on the received images, the processor configured to determine image parameters for individual ones of the received images, the image parameters including a location parameter that indicates a location of the finger of the subject on the first light-reflecting surface of the platen.

A method of generating a composite image of a friction ridge signature of a subject, the method comprising:

• emitting light rays to illuminate a finger of the subject placed in contact with a first light-reflecting surface of a platen;
• capturing images of the finger of the subject in contact with the first light-reflecting surface of the platen, through the platen, in an ongoing manner;
• receiving images of the finger of the subject captured by the camera;
• and
• determining whether the finger of the subject is being rolled across the first light-reflecting surface based on the received images, the determination of whether the finger of the subject is being rolled across the first light-reflecting surface including determining image parameters for individual ones of the received images, the image parameters including a location parameter that indicates a location of the finger of the subject on the first light-reflecting surface of the platen.