| 压缩域DCT系数对图像视频检索影响的研究 |
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| 引用本文： | 杨辉,张涛,胡栋.压缩域DCT系数对图像视频检索影响的研究[J].南京邮电大学学报(自然科学版),2004,24(1):31-39. |
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| 作者姓名： | 杨辉 张涛 胡栋 |
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| 作者单位： | 南京邮电学院,信息工程系,江苏,南京,210003 |
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| 摘 要： | 通过对图像在原始数据域和压缩数据域上的表现差异性进行统计分析,进一步研究了基于DCT变换的图像视频压缩域部分解码DCT信息,并运用于MPEG4的编解码的程序实现。随后提出了一种提高压缩域图像视频检索效率的方法,进而针对IntelX86处理器平台改进了DC+2AC的快速算法。
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| 关 键 词： | 图像视频检索 DCT系数 压缩域 部分解码 |
| 文章编号： | 1000-1972(2004)01-0031-09 |
| 修稿时间： | 2003年7月11日 |
Investigation of the Influence of Compressed-Domain DCT Coefficients on Image and Video Retrieval |
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| YANG Hui,ZHANG Tao,HU Dong.Investigation of the Influence of Compressed-Domain DCT Coefficients on Image and Video Retrieval[J].Journal of Nanjing University of Posts and Telecommunications,2004,24(1):31-39. |
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| Authors: | YANG Hui ZHANG Tao HU Dong |
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| Institution: | YANG Hui,ZHANG Tao,HU Dong Department of Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China |
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| Abstract: | This paper discusses the segment decoding method of image and video compressed-domain based on DCT by analyzing the differences of image representation between original data domain and compressed-domain. We use the method in our implementation of MPEG4 coding and decoding program,and bring forward a fast arithmetic based on DC+2AC to raise the efficiency of compressed-domain image and video retrieval. |
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| Keywords: | Image and video retrieval DCT coefficients Compressed-domain Segment decode |
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