United coding for compound image compression
United coding for compound image compression
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DOI：
10.1109/cisp.2010.5647270
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发表时间：
2010-11
期刊：
影响因子：
--
通讯作者：
Shuhui Wang;Tao Lin
中科院分区：
文献类型：
--
作者：
Shuhui Wang;Tao Lin
提出了一种复合图像压缩方法--联合编码（UC）。该编码方法以宏块为基本编码单元，将游程编码（RLE）、可移植网络图形（PNG）和gzip等无损编码技术结合到H.该方法利用统一编码中的所有编码器对每个宏块进行编码，并采用率失真（R-D）优化准则选择最优编码器。实验结果表明，与H.264相比，UC在处理文字、图形和图片混合的复合图像时，PSNR提高了2dB~ 34 dB，视觉效果更好。此外，UC还具有部分无损（定义为部分无损和部分接近无损）压缩性能。
This paper proposes a compound image compression method named United Coding (UC). In this coding method, several lossless coding techniques such as run-length encoding (RLE), Portable Network Graphics (PNG) and gzip are combined into H.264 hybrid coding, and macroblock is the basic coding unit. All coders in UC are used to code each macroblock, and rate-distortion (R-D) optimization criterion is applied to select the optimum coder. Experimental results show that compared to H.264, UC achieves 2dB~34dB PSNR improvement and better visual image quality for compound image with mixed text, graphics and picture. Moreover, UC also has a partial-lossless (defined as partially lossless and partially near-lossless) compression performance.