本文简要介绍了二维条码PDF417的编码、译码及纠错的原理和图像的采集和识别，然后研究了二维条码PDF417在三种模式下编码和译码算法，并设计了应用系统程序来实现-This article briefly describes the two-dimensional bar code PDF417 encoding, decoding and error correction principle and image capture and recognition, and then study t