An application and implementation of two-dimensional symbols for circuit board quality control system

The ability to accurately monitor and control productive pipelines is extremely important for quality control. Therefore, capturing data from printed circuit boards (PCB) or electronic components is necessary. Two-dimensional (2-D) symbols are constructed by means of extending the functions of barcodes. Because of the advantages of 2-D symbols, barcode technology implementation is efficient, low cost solution for the electronic product control. This paper proposes an algorithm for an application of 2-D symbols for industrial processes at first. And then we use a 2-D matrix symbols - QR code, to implementation a system. This system is compared with other systems such as those using barcodes, OCR, smart card and etc. And then a new adaptable and flexible algorithm for the dot cell 2-D symbol recognition is proposed in this paper compared with the standard reference algorithm. At the end some problems about special 2-D symbol is discussed