| 引用本文: | 黄哲,陈浩,张晔.H.264标准压缩视频的超分辨率重建[J].哈尔滨工业大学学报,2010,42(5):721.DOI:10.11918/j.issn.0367-6234.2010.05.011 |
| HUANG Zhe,CHEN Hao,ZHANG Ye.Super-resolution reconstruction of H.264 compressed video[J].Journal of Harbin Institute of Technology,2010,42(5):721.DOI:10.11918/j.issn.0367-6234.2010.05.011 |
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| 摘要: |
| 为利用低分辨率压缩图像序列来重建高分辨率图像序列,提出一种在凸集投影(POCS)方法框架下基于整数DCT域量化噪声模型的针对H.264标准压缩视频的超分辨率重建方法.首先建立压缩视频的降质退化模型,然后根据H.264标准中的整数DCT变换和量化过程建立整数DCT域的量化噪声模型,最后在凸集投影算法的框架下给出了基于整数DCT域量化噪声的超分辨率重建算法.实验表明该算法的超分辨率重建结果的主观质量提高明显,峰值信噪比可达到30dB,一般迭代5次即可得到良好结果,算法复杂度较低. |
| 关键词: 超分辨率重建 整数DCT变换 量化噪声 H.264压缩视频 |
| DOI：10.11918/j.issn.0367-6234.2010.05.011 |
| 分类号:TP391.41 |
| 基金项目:黑龙江省自然科学基金资助项目(ZJG04-0701) |
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| Super-resolution reconstruction of H.264 compressed video |
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HUANG Zhe1,2, CHEN Hao1, ZHANG Ye1
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1.Institute of Image and Information Technology,Harbin Institute of Technology,Harbin 150001,China,huangzhe;2.Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China)
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| Abstract: |
| To reconstruct high-resolution(HR) images from a sequence of low-resolution(LR) compressed images,this paper proposes a novel algorithm focused on super-resolution reconstruction of H.264 compressed video,which is based on the integer DCT transform-domain quantization noise.Firstly,models of compressed video and integer DCT transform-domain quantization noise are surveyed.Then the reconstruction algorithm under the POCS theory is proposed.Experimental results demonstrate that this algorithm has a great improvement in subjective visual quality and low computation complexity,in which PSNR can reach 30 dB and iterations are less than 5 times. |
| Key words: super-resolution reconstruction integer DCT quantization noise H.264 compressed video |
