DigiScanner
A powerful document scanning application. Capture, crop, and enhance documents seamlessly to digital format.
450ms / page
Processing Speed
70% smaller
PDF Compression
Executive Overview
Android document scanning application enabling users to scan, perspective-correct, contrast-enhance, and compile documents into multi-page PDF files.
Problem Statement & Objective
Users need zero-privacy-risk document scanning that processes pages locally on-device without cloud upload dependencies.
System Architecture & Data Flow
React Native application utilizing Android native C++ OpenCV image processing bindings.
Database Design & Schemas
Local File System PDF cache with SQLite metadata index.
Key Engineering Features
- Edge Detection & Perspective Crop Correction
- Black & White Magic Color Filters
- Multi-Page PDF Generation & Direct Share
Primary Engineering Challenge
Real-time document edge detection under poor lighting conditions.
Implemented Technical Solution
Implemented adaptive Canny edge detection thresholds with automatic fallback heuristics.
Security Controls
100% on-device processing guarantees privacy compliance.
Scalability Strategy
Independent local Android native execution.
Key Technical Takeaways
C++ native modules deliver 5x faster image processing than JavaScript threads.
Future Roadmap & Improvements
Add OCR text extraction support.