首页> 外文学位 >Lossless compression of spectrally limited color images.
【24h】

Lossless compression of spectrally limited color images.

机译:频谱受限的彩色图像的无损压缩。

获取原文
获取原文并翻译 | 示例

摘要

Some of the most common still images encountered on computer displays are palette color images which have a limited number of color components. Examples of such spectrally limited color images are color-enhanced weather maps, clipart (illustrations), business graphics (bar, line, pie charts), and color quantized images (icons). Although these spectrally limited images are common, most of the literature focuses on continuous-tone images. Compression algorithms designed for continuous-tone images (both lossy and lossless) perform poorly on these spectrally limited images. In this dissertation, multiple-pass lossless context-based compression algorithms that utilize the spatial correlation of the color components were investigated.; The main contributions are, (i) a two-part context coding algorithm that avoids the zero-frequency problem, (ii) an equivalent adaptive coding algorithm that also mitigates the zero-frequency problem, (iii) a context model statistics coder that exploits the statistics' interdependencies, (iv) a context-based data sequence coder that exploits the dependencies between context states and prior coded symbols, (v) a compact representation for the statistics of large contexts, and (vi) a very compact searchable representation of static binary trees.
机译:在计算机显示器上遇到的一些最常见的静止图像是调色板彩色图像,其颜色分量数量有限。这种受光谱限制的彩色图像的示例是增强颜色的天气图,剪贴画(插图),商业图形(条形图,折线图,饼图)和彩色量化图像(图标)。尽管这些频谱受限的图像很常见,但是大多数文献都集中在连续色调图像上。专为连续色调图像(有损和无损)设计的压缩算法在这些频谱受限的图像上效果较差。本文研究了利用色彩分量空间相关性的基于多遍无损上下文的压缩算法。主要贡献在于:(i)避免零频问题的两部分上下文编码算法;(ii)也减轻零频问题的等效自适应编码算法;(iii)利用以下内容的上下文模型统计编码器统计信息之间的相互依赖关系;(iv)利用上下文状态与先前编码符号之间的依赖关系的基于上下文的数据序列编码器;(v)用于大型上下文统计的紧凑表示形式;以及(vi)的非常紧凑的可搜索表示形式静态二叉树。

著录项

  • 作者

    Durgan, Bruce Keith.;

  • 作者单位

    University of California, Santa Cruz.;

  • 授予单位 University of California, Santa Cruz.;
  • 学科 Computer Science.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 111 p.
  • 总页数 111
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自动化技术、计算机技术;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号