Patent ID: 11869229
Assignee: JAPAN DISPLAY INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 11:
12. An apparatus for training a fingerprint image enhancing engine for use in a fingerprint capturing device, the apparatus comprising:
processing circuitry configured as a synthetic image dataset generator configured to produce a synthetic image dataset comprising plural pairs of synthetic images, each pair of synthetic images including a clean synthetic image and a raw synthetic image corresponding to the clean synthetic image, each rave synthetic image being produced according to a model of the fingerprint capturing device;
the processing circuitry is further configured as a neural network trainer configured to train a neural network using the synthetic image dataset;
the processing circuitry is further configured to train the neural network using the synthetic image dataset to produce synthetic training weights for the neural network;
the processing circuitry is further configured to generate a raw fingerprint image using a sensor and analog front end;
the processing circuitry is further configured to process the raw fingerprint image using the neural network and the synthetic training weights to produce an enhanced fingerprint image;
the processing circuitry is further configured to produce a sensor image dataset comprising plural pairs of sensor images, each pair of sensor images including a raw sensor image and a corresponding clean sensor image;
the processing circuitry is further configured to add the raw fingerprint image to the sensor image dataset as a first raw sensor image if the enhanced fingerprint image meets a first predetermined quality constraint;
the processing circuitry is further configured to process the first raw sensor image to produce a processed image that meets a second predetermined quality constraint; and
the processing circuitry is further configured to add the processed image that meets the second predetermined quality constraint to the sensor dataset as the corresponding clean sensor image that corresponds to the first raw sensor image.