基于二维条形码PDF417的图像编解码研究

Research on Image Coding & Encoding Based on Two-dimensional Bar Code PDF417

对二维条形码PDF417的符号表示及压缩模式结构做了简要介绍。在图像信息编码预处理时,以一幅人的头肩像为例,采用自适应建立哈夫曼树,使编码图像容量变至最低,并按照PDF417规定的格式,实现了编码。利用DSP对PDF417条形码进行图像识别,采用相应的算法实现解码,并在PC端显示。

In this paper, symbols and compression structure of two-dimensional bar code PDF417 are briefly introduced. In the preprocess of image coding, a piece of person＇s Head-Shoulder picture is taken as an example, of which capacity is minimized by establishing adaptive Huffman Tree, and coding is done in accordance with the provisions of the PDF417 format. PDF417 bar code is recognized by DSP, and displayed on screen of PC by corresponding decoder algorithm.