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iDocChip: A Configurable Hardware Accelerator for an End-to-End Historical Document Image Processing.

Menbere Kina Tekleyohannes¹, Vladimir Rybalkin¹, Muhammad Mohsin Ghaffar¹

¹Microelectronic Systems Design Research Group, University of Kaiserslautern, 67663 Kaiserslautern, Germany.

Journal of Imaging

|September 26, 2021

Summary

A new portable system, iDocChip, enables accurate optical character recognition (OCR) for historical documents on the go. This low-power device significantly improves upon existing OCR software in speed and energy efficiency.

Keywords:

FPGA OCR Zynq hardware architecture hardware-software co-design historical documents image processing

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Area of Science:

Digital humanities
Computer engineering
Information science

Background:

Increasing demand for digitized historical records necessitates efficient OCR solutions.
Existing OCR software (anyOCR) offers high accuracy but is not suitable for portable devices due to high computational complexity.
Portable scanning and OCR devices are required for digitizing records in situ.

Purpose of the Study:

To design and implement a portable, low-power, and energy-efficient system for accurate OCR of historical documents.
To develop a configurable hardware-software System-on-Chip (SoC) named iDocChip.
To optimize the anyOCR algorithm for real-time performance on portable devices.

Main Methods:

Designed and implemented a hybrid CPU-FPGA architecture for the iDocChip.
Developed optimized software implementations of the anyOCR algorithm for the iDocChip.
Evaluated the system's runtime, power consumption, and recognition accuracy on multiple platforms.

Main Results:

The iDocChip system demonstrated a 44x improvement in runtime compared to existing anyOCR.
Achieved 2201x higher energy efficiency with the iDocChip.
Obtained a 3.8% increase in recognition accuracy.

Conclusions:

The iDocChip provides a portable, real-time, and energy-efficient solution for digitizing historical records using OCR.
The hybrid CPU-FPGA architecture and optimized software enable high accuracy and performance on portable devices.
iDocChip significantly advances the accessibility and processing of historical archives.