Fingerprint Recognition Apparatus Multi-Compression Circuit
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Solution Overview
Problem
The increasing demand for high-resolution fingerprint recognition leads to longer data processing times due to low bandwidth in fingerprint recognition apparatus, necessitating efficient data compression techniques.
Innovation Solution
A fingerprint recognition apparatus with an effective fingerprint distribution judgement circuit to differentiate between effective and invalid fingerprint zones in a pixel array, using a first compression method for the effective zone and a second method for the invalid zone to compress fingerprint data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution fingerprint recognition is implemented, then recognition rate is improved, but data processing time increases due to low bandwidth
Solution Approach 1:
The pixel array is divided into multiple zones based on fingerprint distribution characteristics. The judgement circuit identifies effective fingerprint zones containing actual fingerprint data versus invalid zones containing background or noise. This segmentation allows different compression strategies to be applied to different regions, reducing overall data volume while preserving recognition-critical information.
Solution Approach 2:
Different compression methods are applied to different zones of the pixel array. Effective fingerprint zones use lossless compression to preserve recognition accuracy, while invalid zones use lossy compression with higher compression ratios. This local differentiation optimizes the balance between data fidelity and compression efficiency based on the actual fingerprint distribution.
2Productivity
If data compression is applied to reduce processing time, then data transmission efficiency is improved, but compression ratio and speed need optimization
Solution Approach 1:
The compression process is segmented into two parallel operations: lossless compression for effective zones and lossy compression for invalid zones. This segmentation allows the system to process different regions simultaneously with appropriate compression algorithms, improving overall throughput without sacrificing recognition-critical data quality.
Solution Approach 2:
The compression parameters are dynamically adjusted based on zone type. Effective zones use parameters optimized for lossless compression (higher fidelity, lower compression ratio), while invalid zones use parameters optimized for lossy compression (lower fidelity acceptable, higher compression ratio). This parameter differentiation maximizes data transmission efficiency while maintaining recognition accuracy.
Data Source
AI summary
A fingerprint recognition apparatus with fingerprint data compression is introduced, including: a pixel array obtaining a fingerprint data; a control circuit coupling to the pixel array and obtaining characteristic values of the pixel array; an effective fingerprint distribution judgement circuit coupling to the pixel array and determining a first part of the pixel array as an effective fingerprint zone and a second part of the pixel array as an invalid fingerprint zone according to the characteristic values of each row of the pixel array; and a multi-compressing circuit coupling to the effective fingerprint distribution judgement circuit and compressing the fingerprint data in the effective fingerprint zone with a first compression method and compressing the fingerprint data in the invalid fingerprint zone with a second compression method.