Biometric Imaging System Real-Time Feedback Capture
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Solution Overview
Problem
Biometric imaging systems face challenges in reliably capturing quality biometric print images due to issues with scanner timing and incorrect finger placement, leading to complex and time-consuming processes.
Innovation Solution
A biometric imaging system and method that initiates camera operation, scans, processes, and determines print quality, allowing for real-time feedback and annotation, with features like filtering, binarization, and quality classification to ensure capture of high-quality images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional print scanning methods are used, then print images can be captured, but the process becomes complex and time-consuming due to scanner timing issues and incorrect finger placement
Solution Approach 1:
The system performs preliminary actions by providing real-time visual feedback to the operator during finger placement, allowing corrections to be made before the actual print capture. The preview image shows finger placement quality immediately, enabling the operator to adjust positioning before committing to a scan, thus avoiding repeated scans and reducing time loss.
Solution Approach 2:
The system implements feedback by displaying a preview image of the captured print in real-time, allowing the operator to assess print quality and make immediate adjustments. This feedback loop enables the operator to verify correct finger placement and adjust if necessary, improving capture efficiency and reducing the need for repeated scans.
2Reliability
If multiple scans are performed to ensure quality, then print image quality improves, but the process complexity increases
Solution Approach 1:
The system reduces process complexity by implementing real-time feedback that displays preview images during finger placement. This allows quality assessment to occur during the initial scan setup rather than requiring multiple separate scans, simplifying the overall process while maintaining high print image quality through immediate visual verification.
Solution Approach 2:
The system performs preliminary quality assessment by displaying preview images before final capture. This preliminary action allows the operator to verify print quality in advance, ensuring high reliability without needing to perform multiple separate scanning operations, thus reducing process complexity.
3Reliability
If real-time quality assessment is implemented, then print quality reliability improves, but processing time increases
Solution Approach 1:
The system performs quality assessment as a preliminary action during the initial capture phase by displaying preview images. This allows quality verification to occur before final capture decisions are made, ensuring print quality reliability without adding significant processing time to the overall workflow, as the assessment happens concurrently with capture setup rather than as a separate post-processing step.
Solution Approach 2:
The system implements feedback through real-time preview image display that provides immediate quality assessment. This feedback mechanism allows the operator to verify print quality during the capture process itself, ensuring reliability without requiring extensive additional processing time, as the assessment is integrated into the capture workflow rather than being a separate time-consuming step.
Data Source
AI summary
A method of reliably capturing biometric print images includes determining the print quality of a scanned image, detecting prints in the scanned image, and determining whether the scanned image is ready for capture. The method includes filtering the scanned image, binarizing the filtered image, detecting print area, print contrast, and print shape of the binarized image, and separating the print image into individual print images based on the print area, contrast, and shape. Each individual print image is classified base on a predetermined quality threshold and a quality classification of each individual print image is indicated. The method includes a predetermined capture delay time period, quality time period, and scanner timeout period. An operator can annotate issues regarding missing or unacceptable print images. A system of reliably capturing biometric print images includes a scanner including a print capture manager, a computer, and a communication link between the computer and scanner.