Electronic device and method for quickly feeding back comparison result in fingerprint identification system

Abstract

The invention relates to an electronic device and method for quickly feeding back a comparison result in a fingerprint identification system, and the electronic device comprises a storage module, a comparison module, a clock module, a sample cache region, a transition cache region, a priority comparison cache region, a comparison success record table, and a priority comparison table. The method for quickly feeding back the comparison result in the fingerprint identification system specifically comprises the following steps: pre-reading; collecting field sample characteristic data; comparing. The method has the beneficial effects that by combining the previous time when comparison succeeds and the matching feature serial number, a plurality of groups of feature data with high comparison success frequency are loaded into the cache in advance, so that the reading time of a part of feature data is reduced, and the blind sequential reading of the feature data from the storage module is avoided; the whole process execution time is shortened; random comparison is avoided, and the execution time of comparison operation is shortened; the user experience is improved.

Description

technical field [0001] The invention relates to the field of fingerprint identification, in particular to an electronic device and method for rapidly feeding back comparison results in a fingerprint identification system. Background technique [0002] Fingerprint has the characteristics of uniqueness, stability, reliability, easy collection and low cost, so fingerprint recognition technology is one of the most widely used biometric technologies so far, and occupies an absolute dominant position. But at the same time, there are many difficulties in the fingerprint recognition technology. For example, some users have to wait a few seconds after pressing the fingerprint on the device before sending out the feedback of successful recognition. To be further optimized and strengthened. [0003] The traditional fingerprint identification system comparison workflow is as follows: figure 1 As shown, the specific process is as follows: [0004] (1) Obtain on-site sample images; ...

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Problems solved by technology

[0011] The disadvantage of the above-mentioned traditional fingerprint identification system comparison workflow is: when performing step (3), it is necessary to read all valid features stored in the storage module in a predetermined order; the predetermined order of this reading depends on the storage The order has a lot of randomness, and it cannot ensure that the feature with the highest success rate of the first time is compared first; when performing the loop operation of steps (3)-(5), if the matching feature is stored in the last position, It is necessary to read all the valid features stored in the storage module; when the number of valid features stored in the storage module is too large, this operation requires the system to spend more execution time, indirectly wastes the user's waiting time, and directly affects the user experience; Before performing the loop operation of steps (3)-(5), be sure to obtain a valid on-site sample image, otherwise all subsequent actions cannot be carried out

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