Research On Image Enhancement And Application Of Two-Dimensional Bar Code Of Mobile Terminal

Based on the existing species, advantages, and identification technology of two-dimension bar code, the characteristic of Symbian OS, and developing platform of application, this paper researches the identification system of two-dimension bar code.Firstly, use MMS and built-in camera to gather initial image. Secondly, operate the polluted image by using graying and filter . Thirdly, binary the non-uniform illumination image using thresholding, and identify candidates for orientation bar code among the found regions using rules, and pinpoint bar code using convex hull algorithm. Finally, correct bar code image to login useful WAP website using built-in browser.According to the real-time request of mobile terminal, select weighted average graying with low calculation to operate the initial bar code image, select a kind of adaptive thresholding to operate the problem of non-uniform illumination. According to strict hardware restrict of mobile terminal, select rules from characters of bar code structure to identify candidates for orientation bar code among the found regions from complex background, select convex hull algorithm with low calculation to pinpoint bar code. According to widely application of WAP in mobile terminal, this system integrates the function of entering WAP website.In the end, the image enhanced identification system of two-dimension bar code is constructed on Series 60. And the experimental results proves that this system can recognize two-dimension bar code well and satisfy the real-time request of mobile terminal.