Description: In this paper, a DSP-based two-dimensional bar code scanner technology. The scanner in MOTOROLA at the core of DSP56F826 using CMOS image sensor with progressive scan bar code data collection methods and to expand the use of high-speed memory chips, as well as sophisticated decoding algorithms, implementation of a highly efficient and accurate real-time processing. Text to clarify the working principle of the system, functional as well as hardware and software implementation methods. At the same time, PDF417 code outlines the principles and two-dimensional bar code encoding system development prospects.
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