How We Built PrezScan: Free Hardware-Free Biometric Attendance for Indian Universities

说明与用途

PrezScan 是一款免费、无硬件的印度高校生物识别考勤 Web 应用，采用人脸识别和校园 Wi‑Fi 地理围栏，保障隐私并提供即时报告。

问题

Hundreds of students line up daily before faulty fingerprint machines, causing delays.

结果

PrezScan eliminates hardware failures, reduces queue times, ensures privacy by keeping raw photos local, and provides instant audited attendance reports.

工作流

• Students open the PrezScan web app on a device
• The app captures a 68‑point facial image via the camera
• Client‑side WebGL GPU processes the image to a 128‑dimensional vector
• The app checks the student’s Wi‑Fi subnet to confirm campus location
• If both checks pass, attendance is recorded locally and synced to the server
• Admins export attendance as audited Excel reports with timestamps and session hours

证据

Every morning across engineering colleges and universities in India, hundreds of people line up in front of wall-mounted fingerprint machines that break down and cause morning delays.

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Dual‑Lock Anti‑Proxy Attendance: Enforces a physical double‑lock combining on‑device 68‑point AI facial recognition with academic building Wi‑Fi subnet (CIDR) geofencing.

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Sub‑200ms Verification: Runs client‑side directly in the browser engine using WebGL GPU acceleration.

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100% Privacy by Design (DPDP Act 2023 Compliant): Raw face photos are never sent over the internet or stored on servers; only local 128‑dimensional mathematical vector embeddings are evaluated.

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1‑Click Audited Excel Reports: Monthly attendance ledgers export complete timestamps and session hours instantly in formatted spreadsheets.

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