Fingerprint image detecting device and method
AssigneeImage Match Design Inc.
InventorZhieng-Chung CHEN
Life of this patent
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Abstract
By use of the characteristics that an analog-to-digital converter sends out data sequentially when it converts data of a two-dimensional analog image into pixel data, a fingerprint image detecting device and method generate digital output data having a plurality of rows of data, generate a plurality of one-dimensional datum segments linearly from the digital output data, and determine whether the two-dimensional analog image is a real fingerprint image according to the plurality of one-dimensional datum segments. Thus, the detection of a fingerprint image is implemented by means of one-dimensional calculation instead of two-dimensional calculation, thereby effectively reducing computational load and computational time.
Claims36
A fingerprint image detecting device comprising:
- an analog-to-digital converter receiving a two-dimensional analog image, and converting the two-dimensional analog image into pixel data and sequentially transmitting the pixel data so as to generate digital output data having a plurality of rows of data;
- a reading unit connected to the analog-to-digital converter, generating a plurality of one-dimensional datum segments linearly from the digital output data;
- and
- a processing unit connected to the reading unit, determining whether the two-dimensional analog image is a real fingerprint image according to the plurality of one-dimensional datum segments.
A fingerprint image detecting method comprising the steps of:
- A.) receiving a two-dimensional analog image;
- B.) converting the two-dimensional analog image into pixel data and sequentially transmitting the pixel data so as to generate digital output data having a plurality of rows of data;
- C.) generating a plurality of one-dimensional datum segments linearly from the digital output data;
- and
- D.) according to the plurality of one-dimensional datum segments determining whether the two-dimensional analog image is a real fingerprint image.
Dependencies are inferred from the claim text.