A VLSI Design of Image Rotation for Real Time 2-D Barcode Identification

Abstract:

Image rotation is a necessity for 2-D barcode identification. The computation complexity of image rotation is considered as a key problem of the implementation of real time 2-D barcode identification. This paper presents a novel VLSI structure for image rotation which can calculate the tilt angle of 2-D barcode image and rotate image to the horizontal way. The circuit to calculate the tilt angel of 2-D barcode is simple and effective and can be implemented with low hardware complexity. Image rotation algorithm takes use of improved CORDIC algorithm and Bi-linear interpolation and is implemented by high-speed pipelined architecture. The proposed architecture is implemented on the Altera Stratix IV FPGA. Experimental results show that the proposed architecture can rotate 2-D barcode images with arbitrary tilt angles to the horizontal way at 132MHz. Moreover, it can keep image details clear thus improving 2-D barcode identification rate.

• Periodical: Applied Mechanics and Materials (Volumes 198-199)
• Pages: 357-360
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.198-199.357
• Online since: September 2012
• Authors: Jian Hua Li, Guo Cheng Wang, Yi Chen, Meng Zhang, Ping Li
• Keywords: Field-Programmable Gate Array (FPGA), Image Rotation, Internet of Things (IOT), QR 2-D Barcode

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