Print And Recognition Research Of Three-dimensional Barcode

Since the invention of barcode, it has been developing very quickly and greatly improved the data collection and speed of information process. It has made great contributions to the management of modern science. With the application of barcode technologies, people meet a higher requirement for barcode on its information capacity, security, recognition rate etc. In recent years, with the low cost and mature of color print and acquisition equipments, people put forward a concept of three-dimensional barcode by adding color information to the two-dimensional barcode. As a new technology of information storage and identification, since the birth of three-dimensional barcode many countries pay great attention to it. The United States and Japan not only applied it to the document management of departments, such as public security, diplomatic service, military branches etc, but also committed to the development of new technologies and related standards in order to meet the further requirements of greater amount of information and pattern structure.With the modules color change and vertical arrangement, three-dimensional barcode can express more information in a limited space at the horizontal and vertical directions for the purpose of improving the information capacity. It is an effective tool to achieve information storage and identification and can describe the product features in detail. Besides the basic features of two-dimensional barcode, three-dimensional barcode has many features, such as higher information capacity, great reliability, nice error correction ability, and can record complex data, such as image data.Based on the Data Matrix two-dimensional barcode and by studying the data coding process, we add color information to the module in order to increase the storage of information without changing the flat space and achieve the purpose of describing more product information in the limited space. By actual examples of barcode generation, this article discussed how to achieve the generation and recognition system of three-dimensional barcode, studied the color space selection methods suitable for the actual print, and designed a color coding scheme. A fixed-color adaptive threshold Canny edge detection algorithm based on three-dimensional bar code image is released in order to achieve effective image segmentation and recognition rate. The experiment shows that the algorithm is feasible.