计算机应用 ›› 2011, Vol. 31 ›› Issue (05): 1221-1223.DOI: 10.3724/SP.J.1087.2011.01221

• 图形图像技术 • 上一篇    下一篇

基于查找表的误差分散半调图像的混合压缩算法

耿烨1,孔月萍1,刘欣2   

  1. 1.西安建筑科技大学 信息与控制工程学院,西安710055
    2.西安建筑科技大学 网络中心,西安710055
  • 收稿日期:2010-11-15 修回日期:2011-01-10 发布日期:2011-05-01 出版日期:2011-05-01
  • 通讯作者: 耿烨
  • 作者简介:耿烨(1983-),女,陕西西安人,助理工程师,硕士,主要研究方向:数字图像处理;孔月萍(1965-),女,重庆人,教授,博士,主要研究方向:图形图像处理、网络数据库;刘欣(1978-),男,陕西西安人,助理工程师,硕士,主要研究方向:数字图像处理。
  • 基金资助:

    陕西省自然科学基金资助项目(2010JM8010);陕西省教育厅专项(09JK527);西安建筑科技校青年科技基金资助项目(QN1021)。

Mixed compression algorithm for error-diffusion halftone image based on look-up table

GENG Ye1, KONG Yue-ping1, LIU Xin2   

  1. 1. School of Information and Control Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China
    2. Network and Information Center, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China
  • Received:2010-11-15 Revised:2011-01-10 Online:2011-05-01 Published:2011-05-01

摘要: 结合现有逆半调技术,针对无损压缩所得压缩率较低,而现有二值图像有损压缩算法对误差分散图像的压缩效果并不理想等缺陷,设计了一种针对误差分散半调图像的混合压缩算法。该算法采用LUT逆半调对误差分散半调图像进行灰度化重建,再通过改进离散余弦变换(DCT)系数量化法,以提高压缩率。实验证明该算法能获得较好的压缩效果和较高的压缩率。

关键词: 数字半调图像, 逆半调处理, 离散余弦变换

Abstract: A mixed compression algorithm for error-diffusion image that could overcome the disadvantages of the conventional binary image loss coding techniques and combined with the inverse half toning method was proposed. Look-Up-Table (LUT) inverse half toning method was used to convert error-diffusion image back to the contone image, then an improved Discrete Cosine Transform (DCT) coding algorithm was constructed to get higher compression rate. The experimental results indicate that the proposed algorithm fits to the error-diffusion image, and the quality of the decoding image is well.

Key words: digital halftone image, inverse halftoning processing, Discrete Cosine Transform (DCT)