基于投影算法的二维条码识别

文中以PDF417条码为例研究了二维条码的分割和识别算法，首先根据Hough变换定位出图像上的条码，并利用双线性插值将条码旋至水平，然后再在条码中定位单个码字符号的图像，最后利用投影算法识别出单个码字符号。文中提出的投影算法能有效地去除几种常见的图像噪音对条码识别的影响，提高了条码的识别率。实验结果充分表明此算法具有良好的性能，满足了实际使用的要求。

Recognition of Two-dimension Barcode Based on Projection Algorithm

The algorithm of two-dimension barcode segmentation and recognition is discussed in the paper using PDF417 as an example. The position of barcode is located from the image according to Hough transform and the barcode is rotated to be horizontal based on bilinear interpolation. Then the image is further segmented to locate the single codeword image and it's recognized by projection algorithm. The projection algorithm can efficiently remove image noise and achieve high recognition rate. The result shows that the performance of the algorithm is good, which suffices to the requirement of the practical use.