| 引用本文: | 卢山,焦李成,吴家骥.改进的整型KL变换和SPECK编码的彩色图像压缩方法[J].哈尔滨工业大学学报,2012,44(3):123.DOI:10.11918/j.issn.0367-6234.2012.03.024 |
| LU Shan,JIAO Li-Cheng,WU Jia-Ji.Color image compression based on improved integer karhunen-loeve transform and SPECK[J].Journal of Harbin Institute of Technology,2012,44(3):123.DOI:10.11918/j.issn.0367-6234.2012.03.024 |
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| 摘要: |
| 为了解决彩色图像的无损压缩问题,提出了一种改进的整型KL变换(Improved Integer Karhunen-Loeve Transform,IIntKLT)和SPECK编码相结合的彩色图像压缩方法．该算法首先设计了一种新的IIntKLT方法,以去除R,G,B颜色分量之间的相关性,并保证了变换的完全无损可逆性,然后再结合改进的SPECK编码方法进一步的提高了编码性能．通过对标准测试彩色图像的实验结果表明:此方法无损压缩比平均提高 0.1 bpp,有损压缩下,最高优于JPEG2000 0.88 dB． |
| 关键词: 完全可逆KL变换 SPECK编码 彩色图像编码 无损压缩 去相关性 |
| DOI：10.11918/j.issn.0367-6234.2012.03.024 |
| 分类号:TQ171 |
| 基金项目:国家自然科学基金资助项目(1,6);国家教育部博士点基金资助项目(200807010003)． |
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| Color image compression based on improved integer karhunen-loeve transform and SPECK |
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LU Shan,JIAO Li-Cheng,WU Jia-Ji
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| Abstract: |
| A lossless compression method for 3-D color images is proposed based on Improved Integer Karhunen-Loeve Transform(IIntKLT), incorporated with SPECK for color image compression. First, the IIntKLT is applied to reduce the redundancies between the color components, so that the complete reversible transform is guaranteed, and then by using SPECK, the performance of coding is improved. The results of experimentation of standard testing color image, show that the new approach has an increase of 0.1 bpp in lossless image compression, and in the case of complete reversible lossy compression, compared with JPEG2000, it at most has a increase of 0.88 dB. |
| Key words: complete reversible KL transform SPECK coding color image coding lossless compression decorrelation |
