基于JPEG标准静止图像压缩算法的分析与研究  

Analysis and Research JPEG standard compression algorithm based on still images

作　　者：张明[1] 

机构地区：[1]兰州城市学院信息工程学院,甘肃兰州730070

出　　处：《自动化与仪器仪表》2014年第12期51-53,共3页Automation & Instrumentation

基　　金：甘肃省城市发展研究院项目(2012-GSCFY-KJ05);兰州城市学院教学研究项目(2012-JY-24)

摘　　要：介绍了JPEG标准、JPEG2000标准及其相比JPEG标准的改进和优点。通过对JPEG标准压缩流程及算法的分析与研究,得到JPEG标准压缩的基本原理:利用人类的视觉特点对亮度分量的精度敏感,而对色度分量的精度迟钝,将RGB颜色模式转换为YCrCb颜色模式;基于视觉特点来抑制高频部分使用离散余弦变换和量化来实现;应用完全可逆的熵编码即霍夫曼编码使比特序列更小。This paper introduces the JPEG standard, JPEG2000 standard and improvements and advantages than JPEG. Analysis and research of compression process and compression algorithm based on JPEG standard, come to the conclusion that the basic principle of JPEG compression standard： using human visual characteristics is sensitive to the luminance component and insensitive to the chrominance component, convert RGB color mode to YCr Cb color mode; Using discrete cosine transform and quantization to control the high frequency part based on visual features; Application the Huffman coding that is completely reversible entropy coding to make smaller bit sequence.

关 键 词：JPEG JPEG2000 图像压缩 压缩算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]