SThe Research On Barcode Automatic Identification Technology And Error Correction Algorithm Of Broken Barcode

In practice, bar code image capture, when subject to various conditions, restrictions (such as shooting distance, angle, light, temperature, etc.) received by the image will not only contain barcode information, and the image quality will not be ideal, and therefore need to adopt related to image processing methods to the collected images obtained pre-order the initial position bar code image region and improve image quality.The use of bar codes are vulnerable to the process of stains, defects and other forms of damage, so the bar code checking and error-correcting ability to read the correct bar code is extremely important, one-dimensional bar code can check out whether there is dislocation, but the two-dimensional bar code can not only detect errors, but also can correct the error. In this paper, study the advanced two-dimensional bar code error control algorithm - Improved Reed-Solomon error correction algorithm. The improved use of BM (Berlekamp-Massey) iterative algorithm to calculate the error location polynomial; by Chen's search algorithm for computing the error location polynomial roots, root shall be the reciprocal of the error location; error values using Forney algorithm. Experiments show that the relative speed of error correction decoding algorithm for the traditional RS will increase 2% to 7%, and can improve accuracy.Designed and developed a CMOS image sensor based on hand-held scanning device, the device can quickly read all the standard precision, especially for damaged, print and fold the poor quality bar codes can also be read properly...